Imperial College London

ProfessorHenriqueAraujo

Faculty of Natural SciencesDepartment of Physics

Professor of Physics
 
 
 
//

Contact

 

+44 (0)20 7594 7549h.araujo

 
 
//

Location

 

510Blackett LaboratorySouth Kensington Campus

//

Summary

 

Publications

Publication Type
Year
to

173 results found

Aalbers J, Akerib DS, Al Musalhi AK, Alder F, Amarasinghe CS, Ames A, Anderson TJ, Angelides N, Araujo HM, Armstrong JE, Arthurs M, Baker A, Balashov S, Bang J, Bargemann JW, Baxter A, Beattie K, Beltrame P, Benson T, Bhatti A, Biekert A, Biesiadzinski TP, Birch HJ, Blockinger GM, Boxer B, Brew CAJ, Bras P, Burdin S, Buuck M, Carmona-Benitez MC, Chan C, Chawla A, Chen H, Cherwinka JJ, Chott NI, Converse MV, Cottle A, Cox G, Curran D, Dahl CE, David A, Delgaudio J, Dey S, de Viveiros L, Ding C, Dobson JEY, Druszkiewicz E, Eriksen SR, Fan A, Fearon NM, Fiorucci S, Flaecher H, Fraser ED, Fruth TMA, Gaitskell RJ, Geffre A, Genovesi J, Ghag C, Gibbons R, Gokhale S, Green J, van der Grinten MGD, Hall CR, Han S, Hartigan-O'Connor E, Haselschwardt SJ, Huang DQ, Hertel SA, Heuermann G, Horn M, Hunt D, Ignarra CM, Jahangir O, James RS, Johnson J, Kaboth AC, Kamaha AC, Khaitan D, Khazov A, Khurana I, Kim J, Kingston J, Kirk R, Kodroff D, Korley L, Korolkova EV, Kraus H, Kravitz S, Kreczko L, Krikler B, Kudryavtsev VA, Leason EA, Lee J, Leonard DS, Lesko KT, Levy C, Lin J, Lindote A, Linehan R, Lippincott WH, Liu X, Lopes MI, Asamar EL, Lorenzon W, Lu C, Lucero D, Luitz S, Majewski PA, Manalaysay A, Mannino RL, Maupin C, McCarthy ME, McDowell G, McKinsey DN, McLaughlin J, Miller EH, Mizrachi E, Monte A, Monzani ME, Mendoza JDM, Morrison E, Mount BJ, Murdy M, Murphy ASJ, Naim D, Naylor A, Nedlik C, Nelson HN, Neves F, Nguyen A, Nikoleyczik JA, Olcina I, Oliver-Mallory KC, Orpwood J, Palladino KJ, Palmer J, Parveen N, Patton SJ, Penning B, Pereira G, Perry E, Pershing T, Piepke A, Poudel S, Qie Y, Reichenbacher J, Rhyne CA, Riffard Q, Rischbieter GRC, Riyat HS, Rosero R, Rushton T, Rynders D, Santone D, Sazzad ABMR, Schnee RW, Shaw S, Shutt T, Silk JJ, Silva C, Sinev G, Smith R, Solovov VN, Sorensen P, Soria J, Stancu I, Stevens A, Stifter K, Suerfu B, Sumner TJ, Szydagis M, Taylor WC, Temples DJ, Tiedt DR, Timalsina M, Tong Z, Tovey DR, Tranter J, Trask M, Tripathi M, Tronstad Det al., 2023, Search for new physics in low-energy electron recoils from the first LZ exposure, PHYSICAL REVIEW D, Vol: 108, ISSN: 2470-0010

Journal article

Araujo HM, Balashov SN, Borg JE, Brunbauer FM, Cazzaniga C, Frost CD, Garcia F, Kaboth AC, Kastriotou M, Katsioulas I, Khazov A, Kraus H, Kudryavtsev VA, Lilley S, Lindote A, Loomba D, Lopes MI, Asamar EL, Dapica PL, Majewski PA, Marley T, McCabe C, Mills AF, Nakhostin M, Neep T, Neves F, Nikolopoulos K, Oliveri E, Ropelewski L, Tilly E, Solovov VN, Sumner TJ, Tarrant J, Turnley R, van der Grinten MGD, Veenhof Ret al., 2023, The MIGDAL experiment: Measuring a rare atomic process to aid the search for dark matter, ASTROPARTICLE PHYSICS, Vol: 151, ISSN: 0927-6505

Journal article

Aalbers J, Akerib DS, Akerlof CW, Musalhi AKA, Alder F, Alqahtani A, Alsum SK, Amarasinghe CS, Ames A, Anderson TJ, Angelides N, Araujo HM, Armstrong JE, Arthurs M, Azadi S, Bailey AJ, Baker A, Balajthy J, Balashov S, Bang J, Bargemann JW, Barry MJ, Barthel J, Bauer D, Baxter A, Beattie K, Belle J, Beltrame P, Bensinger J, Benson T, Bernard EP, Bhatti A, Biekert A, Biesiadzinski TP, Birch HJ, Birrittella B, Blockinger GM, Boast KE, Boxer B, Bramante R, Brew CAJ, Bras P, Buckley JH, V Bugaev V, Burdin S, Busenitz JK, Buuck M, Cabrita R, Carels C, Carlsmith DL, Carlson B, Carmona-Benitez MC, Cascella M, Chan C, Chawla A, Chen H, Cherwinka JJ, Chott NI, Cole A, Coleman J, V Converse M, Cottle A, Cox G, Craddock WW, Creaner O, Curran D, Currie A, Cutter JE, Dahl CE, David A, Davis J, Davison TJR, Delgaudio J, Dey S, de Viveiros L, Dobi A, Dobson JEY, Druszkiewicz E, Dushkin A, Edberg TK, Edwards WR, Elnimr MM, Emmet WT, Eriksen SR, Faham CH, Fan A, Fayer S, Fearon NM, Fiorucci S, Flaecher H, Ford P, Francis VB, Fraser ED, Fruth T, Gaitskell RJ, Gantos NJ, Garcia D, Geffre A, Gehman VM, Genovesi J, Ghag C, Gibbons R, Gibson E, Gilchriese MGD, Gokhale S, Gomber B, Green J, Greenall A, Greenwood S, Grinten MGDVD, Gwilliam CB, Hall CR, Hans S, Hanzel K, Harrison A, Hartigan-O'Connor E, Haselschwardt SJ, Hernandez MA, Hertel SA, Heuermann G, Hjemfelt C, Hoff MD, Holtom E, Hor JY-K, Horn M, Huang DQ, Hunt D, Ignarra CM, Jacobsen RG, Jahangir O, James RS, Jeffery SN, Ji W, Johnson J, Kaboth AC, Kamaha AC, Kamdin K, Kasey V, Kazkaz K, Keefner J, Khaitan D, Khaleeq M, Khazov A, Khurana I, Kim YD, Kocher CD, Kodroff D, Korley L, V Korolkova E, Kras J, Kraus H, Kravitz S, Krebs HJ, Kreczko L, Krikler B, Kudryavtsev VA, Kyre S, Landerud B, Leason EA, Lee C, Lee J, Leonard DS, Leonard R, Lesko KT, Levy C, Li J, Liao F-T, Liao J, Lin J, Lindote A, Linehan R, Lippincott WH, Liu R, Liu X, Liu Y, Loniewski C, Lopes MI, Asamar EL, Paredes BL, Lorenzon W, Lucero D, Luitz S, Lyle JM, Maet al., 2023, First Dark Matter Search Results from the LUX-ZEPLIN (LZ) Experiment, PHYSICAL REVIEW LETTERS, Vol: 131, ISSN: 0031-9007

Journal article

Aalbers J, Akerib DS, Al Musalhi AK, Alder F, Alsum SK, Amarasinghe CS, Ames A, Anderson TJ, Angelides N, Araujo HM, Armstrong JE, Arthurs M, Baker A, Bang J, Bargemann JW, Baxter A, Beattie K, Beltrame P, Bernard EP, Bhatti A, Biekert A, Biesiadzinski TP, Birch HJ, Blockinger GM, Boxer B, Brew CAJ, Bras P, Burdin S, Buuck M, Cabrita R, Carmona-Benitez MC, Chan C, Chawla A, Chen H, Chiang APS, Chott NI, V Converse M, Cottle A, Cox G, Creaner O, Dahl CE, David A, Dey S, de Viveiros L, Ding C, Dobson JEY, Druszkiewicz E, Eriksen SR, Fan A, Fearon NM, Fiorucci S, Flaecher H, Fraser ED, Fruth T, Gaitskell RJ, Genovesi J, Ghag C, Gibbons R, Gilchriese MGD, Gokhale S, Green J, van der Grinten MGD, Gwilliam CB, Hall CR, Han S, Hartigan-O'Connor E, Haselschwardt SJ, Hertel SA, Heuermann G, Horn M, Huang DQ, Hunt D, Ignarra CM, Jacobsen RG, Jahangir O, James RS, Johnson J, Kaboth AC, Kamaha AC, Khaitan D, Khurana I, Kirk R, Kodroff D, Korley L, V Korolkova E, Kraus H, Kravitz S, Kreczko L, Krikler B, Kudryavtsev VA, Leason EA, Lee J, Leonard DS, Lesko KT, Levy C, Lin J, Lindote A, Linehan R, Lippincott WH, Liu X, Lopes MI, Asamar EL, Paredes BL, Lorenzon W, Lu C, Luitz S, Majewski PA, Manalaysay A, Mannino RL, Marangou N, Mccarthy ME, Mckinsey DN, Mclaughlin J, Miller EH, Mizrachi E, Monte A, Monzani ME, Mendoza JDM, Morrison E, Mount BJ, Murdy M, Murphy ASJ, Naim D, Naylor A, Nedlik C, Nelson HN, Neves F, Nguyen A, Nikoleyczik JA, Olcina I, Oliver-Mallory KC, Orpwood J, Palladino KJ, Palmer J, Parveen N, Patton SJ, Penning B, Pereira G, Perry E, Pershing T, Piepke A, Porzio D, Poudel S, Qie Y, Reichenbacher J, Rhyne CA, Riffard Q, Rischbieter GRC, Riyat HS, Rosero R, Rossiter P, Rushton T, Santone D, Sazzad ABMR, Schnee RW, Shaw S, Shutt T, Silk JJ, Silva C, Sinev G, Smith R, Solmaz M, Solovov VN, Sorensen P, Soria J, Stancu I, Stevens A, Stifter K, Suerfu B, Sumner TJ, Swanson N, Szydagis M, Taylor R, Taylor WC, Temples DJ, Terman PA, Tiedt DR, Timalsina M, Tong Z, Toveyet al., 2023, Background determination for the LUX-ZEPLIN dark matter experiment, PHYSICAL REVIEW D, Vol: 108, ISSN: 2470-0010

Journal article

Wass PJ, Sumner TJ, Araujo HM, Hollington Det al., 2023, Simulating the charging of isolated free-falling masses from TeV to eV energies: Detailed comparison with LISA Pathfinder results, PHYSICAL REVIEW D, Vol: 107, ISSN: 2470-0010

Journal article

Aalbers J, AbdusSalam SS, Abe K, Aerne V, Agostini F, Maouloud SA, Akerib DS, Akimov DY, Akshat J, Al Musalhi AK, Alder F, Alsum SK, Althueser L, Amarasinghe CS, Amaro FD, Ames A, Anderson TJ, Andrieu B, Angelides N, Angelino E, Angevaare J, Antochi VC, Martin DA, Antunovic B, Aprile E, Araujo HM, Armstrong JE, Arneodo F, Arthurs M, Asadi P, Baek S, Bai X, Bajpai D, Baker A, Balajthy J, Balashov S, Balzer M, Bandyopadhyay A, Bang J, Barberio E, Bargemann JW, Baudis L, Bauer D, Baur D, Baxter A, Baxter AL, Bazyk M, Beattie K, Behrens J, Bell NF, Bellagamba L, Beltrame P, Benabderrahmane M, Bernard EP, Bertone GF, Bhattacharjee P, Bhatti A, Biekert A, Biesiadzinski TP, Binau AR, Biondi R, Biondi Y, Birch HJ, Bishara F, Bismark A, Blanco C, Blockinger GM, Bodnia E, Boehm C, Bolozdynya A, Bolton PD, Bottaro S, Bourgeois C, Boxer B, Bras P, Breskin A, Breur PA, Brew CAJ, Brod J, Brookes E, Brown A, Brown E, Bruenner S, Bruno G, Budnik R, Bui TK, Burdin S, Buse S, Busenitz JK, Buttazzo D, Buuck M, Buzulutskov A, Cabrita R, Cai C, Cai D, Capelli C, Cardoso JMR, Carmona-Benitez MC, Cascella M, Catena R, Chakraborty S, Chan C, Chang S, Chauvin A, Chawla A, Chen H, Chepel V, Chott N, Cichon D, Chavez AC, Cimmino B, Clark M, Co RT, Colijn AP, Conrad J, Converse M, Costa M, Cottle A, Cox G, Creaner O, Garcia JJC, Cussonneau JP, Cutter JE, Dahl CE, David A, Decowski MP, Dent JB, Deppisch FF, de Viveiros L, Di Gangi P, Di Giovanni A, Di Pede S, Dierle J, Diglio S, Dobson JEY, Doerenkamp M, Douillet D, Drexlin G, Druszkiewicz E, Dunsky D, Eitel K, Elykov A, Emken T, Engel R, Eriksen SR, Fairbairn M, Fan A, Fan JJ, Farrell SJ, Fayer S, Fearon NM, Ferella A, Ferrari C, Fieguth A, Fieguth A, Fiorucci S, Fischer H, Flaecher H, Flierman M, Florek T, Foot R, Fox PJ, Franceschini R, Fraser ED, Frenk CS, Frohlich S, Fruth T, Fulgione W, Fuselli C, Gaemers P, Gaior R, Gaitskell RJ, Galloway M, Gao F, Garcia IG, Genovesi J, Ghag C, Ghosh S, Gibson E, Gil W, Giovagnoli D, Girard F, Glade-Beuet al., 2023, A next-generation liquid xenon observatory for dark matter and neutrino physics, Journal of Physics G: Nuclear and Particle Physics, Vol: 50, ISSN: 0954-3899

The nature of dark matter and properties of neutrinos are among the most pressing issues in contemporary particle physics. The dual-phase xenon time-projection chamber is the leading technology to cover the available parameter space for weakly interacting massive particles, while featuring extensive sensitivity to many alternative dark matter candidates. These detectors can also study neutrinos through neutrinoless double-beta decay and through a variety of astrophysical sources. A next-generation xenon-based detector will therefore be a true multi-purpose observatory to significantly advance particle physics, nuclear physics, astrophysics, solar physics, and cosmology. This review article presents the science cases for such a detector.

Journal article

Alonso I, Alpigiani C, Altschul B, Araujo H, Arduini G, Arlt J, Badurina L, Balaz A, Bandarupally S, Barish BC, Barone M, Barsanti M, Bass S, Bassi A, Battelier B, Baynham CFA, Beaufils Q, Berge J, Bernabeu J, Bertoldi A, Bingham R, Bize S, Blas D, Bongs K, Bouyer P, Braitenberg C, Brand C, Braxmaier C, Bresson A, Buchmueller O, Budker D, Bugalho L, Burdin S, Cacciapuoti L, Callegari S, Calmet X, Calonico D, Canuel B, Caramete L-I, Carraz O, Cassettari D, Chakraborty P, Chattopadhyay S, Chauhan U, Chen X, Chen Y-A, Chiofalo ML, Coleman J, Corgier R, Cotter JP, Cruise AM, Cui Y, Davies G, De Roeck A, Demarteau M, Derevianko A, Di Clemente M, Djordjevic GS, Donadi S, Dore O, Dornan P, Doser M, Drougakis G, Dunningham J, Easo S, Eby J, Elertas G, Ellis J, Evans D, Examilioti P, Fadeev P, Fani M, Fassi F, Fattori M, Fedderke MA, Felea D, Feng C-H, Ferreras J, Flack R, Flambaum VV, Forsberg R, Fromhold M, Gaaloul N, Garraway BM, Georgousi M, Geraci A, Gibble K, Gibson V, Gill P, Giudice G, Goldwin J, Gould O, Grachov O, Graham PW, Grasso D, Griffin P, Guerlin C, Gupta RK, Haehnelt M, Hawkins L, Hees A, Henderson VA, Herr W, Herrmann S, Hird T, Hobson R, Hock V, Hogan JM, Holst B, Holynski M, Israelsson U, Jeglic P, Jetzer P, Juzeliunas G, Kaltenbaek R, Kamenik JF, Kehagias A, Kirova T, Kiss-Toth M, Koke S, Kolkowitz S, Kornakov G, Kovachy T, Krutzik M, Kumar M, Kumar P, Lammerzahl C, Landsberg G, Le Poncin-Lafitte C, Leibrandt DR, Leveque T, Lewicki M, Li R, Lipniacka A, Lisdat C, Liu M, Lopez-Gonzalez JL, Loriani S, Louko J, Luciano GG, Lundblad N, Maddox S, Mahmoud MA, Maleknejad A, March-Russell J, Massonnet D, McCabe C, Meister M, Meznarsic T, Micalizio S, Migliaccio F, Millington P, Milosevic M, Mitchell J, Morley GW, Muller J, Murphy E, Mustecaplioglu OE, O'Shea V, Oi DKL, Olson J, Pal D, Papazoglou DG, Pasatembou E, Paternostro M, Pawlowski K, Pelucchi E, dos Santos FP, Peters A, Pikovski I, Pilaftsis A, Pinto A, Prevedelli M, Puthiya-Veettil V, Quenby J, Rafelskiet al., 2022, Cold atoms in space: community workshop summary and proposed road-map, EPJ QUANTUM TECHNOLOGY, Vol: 9, ISSN: 2662-4400

Journal article

Akerib DS, Alsum S, Araujo HM, Bai X, Balajthy J, Bang J, Baxter A, Bernard EP, Bernstein A, Biesiadzinski TP, Boulton EM, Boxer B, Bras P, Burdin S, Byrarn D, Carrara N, Carmona-Benitez MC, Chan C, Cutter JE, de Viveiros L, Druszkiewicz E, Ernst J, Fan A, Fiorucci S, Gaitskell RJ, Ghag C, Gilchriese MGD, Gwilliam C, Hall CR, Haselschwardt SJ, Herte SA, Hogan P, Horn M, Huang DQ, Ignarra CM, Jacobsen RG, Jahangir O, Ji W, Kamdin K, Kazkaz K, Khaitan D, Korolkova E, Kravitz S, Kudryavtsev VA, Leason E, Lenardo BG, Lesko KT, Liao J, Lin J, Lindote A, Lopes M, Manalaysa A, Mannino RL, Marangou N, McKinsey DN, Mei D-M, Morad JA, Murphy ASJ, Naylor A, Nehrkorn C, Nelson HN, Neves F, Nilima A, Oliver-Mallory KC, Palladino KJ, Rhyne C, Riffard Q, Rischbieter GRC, Rossiter P, Shaw S, Shutt TA, Silva C, Solmaz M, Solovov VN, Sorensen P, Sumner TJ, Swanson N, Szydagis M, Taylor DJ, Taylor R, Taylor WC, Tennyson BP, Termn PA, Tiedt DR, To WH, Tvrznikova L, Utku U, Vacheret A, Vaitkus A, Velan V, Webb RC, White JT, Whitis TJ, Witherell MS, Wolfs FLH, Woodward D, Xian X, Xu J, Zhang Cet al., 2022, Fast and flexible analysis of direct dark matter search data with machine learning, PHYSICAL REVIEW D, Vol: 106, ISSN: 2470-0010

Journal article

Linehan R, Mannino RL, Fan A, Ignarra CM, Luitz S, Skarpaas K, Shutt TA, Akerib DS, Alsum SK, Anderson TJ, Araújo HM, Arthurs M, Auyeung H, Bailey AJ, Biesiadzinski TP, Breidenbach M, Cherwinka JJ, Conley RA, Genovesi J, Gilchriese MGD, Glaenzer A, Gonda TG, Hanzel K, Hoff MD, Ji W, Kaboth AC, Kravitz S, Kurita NR, Lambert AR, Lesko KT, Lorenzon W, Majewski PA, Miller EH, Monzani ME, Palladino KJ, Ratcliff BN, Saba JS, Santone D, Shutt GW, Stifter K, Szydagis M, Tomás A, Vavra J, Waldron WL, Webb RC, White RG, Whitis TJ, Wilson K, Wisniewski WJet al., 2022, Design and production of the high voltage electrode grids and electron extraction region for the LZ dual-phase xenon time projection chamber, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol: 1031, ISSN: 0168-9002

The dual-phase xenon time projection chamber (TPC) is a powerful tool for direct-detection experiments searching for WIMP dark matter, other dark matter models, and neutrinoless double-beta decay. Successful operation of such a TPC is critically dependent on the ability to hold high electric fields in the bulk liquid, across the liquid surface, and in the gas. Careful design and construction of the electrodes used to establish these fields is therefore required. We present the design and production of the LUX-ZEPLIN (LZ) experiment’s high-voltage electrodes, a set of four woven mesh wire grids. Grid design drivers are discussed, with emphasis placed on design of the electron extraction region. We follow this with a description of the grid production process and a discussion of steps taken to validate the LZ grids prior to integration into the TPC.

Journal article

Aalbers J, Akerib DS, Al Musalhi AK, Alder F, Alsum SK, Amarasinghe CS, Ames A, Anderson TJ, Angelides N, Araújo HM, Armstrong JE, Arthurs M, Bai X, Baker A, Balajthy J, Balashov S, Bang J, Bargemann JW, Bauer D, Baxter A, Beattie K, Bernard EP, Bhatti A, Biekert A, Biesiadzinski TP, Birch HJ, Blockinger GM, Bodnia E, Boxer B, Brew CAJ, Brás P, Burdin S, Busenitz JK, Buuck M, Cabrita R, Carmona-Benitez MC, Cascella M, Chan C, Chawla A, Chen H, Chott NI, Cole A, Converse MV, Cottle A, Cox G, Creaner O, Cutter JE, Dahl CE, David A, de Viveiros L, Dobson JEY, Druszkiewicz E, Eriksen SR, Fan A, Fayer S, Fearon NM, Fiorucci S, Flaecher H, Fraser ED, Fruth T, Gaitskell RJ, Genovesi J, Ghag C, Gibson E, Gilchriese MGD, Gokhale S, van der Grinten MGD, Gwilliam CB, Hall CR, Haselschwardt SJ, Hertel SA, Horn M, Huang DQ, Hunt D, Ignarra CM, Jahangir O, James RS, Ji W, Johnson J, Kaboth AC, Kamaha AC, Kamdin K, Khaitan D, Khazov A, Khurana I, Kodroff D, Korley L, Korolkova EV, Kraus H, Kravitz S, Kreczko L, Kudryavtsev VA, Leason EA, Leonard DS, Lesko KT, Levy C, Lee J, Lin J, Lindote A, Linehan R, Lippincott WH, Liu X, Lopes MI, Lopez Asamar E, Lopez-Paredes B, Lorenzon W, Luitz S, Majewski PA, Manalaysay A, Manenti L, Mannino RL, Marangou N, McCarthy ME, McKinsey DN, McLaughlin J, Miller EH, Mizrachi E, Monte A, Monzani ME, Morad JA, Morales Mendoza JD, Morrison E, Mount BJ, Murphy ASJ, Naim D, Naylor A, Nedlik C, Nelson HN, Neves F, Nikoleyczik JA, Nilima A, Olcina I, Oliver-Mallory K, Pal S, Palladino KJ, Palmer J, Parveen N, Patton SJ, Pease EK, Penning B, Pereira G, Perry E, Pershing J, Piepke A, Porzio D, Qie Y, Reichenbacher J, Rhyne CA, Richards A, Riffard Q, Rischbieter GRC, Rosero R, Rossiter P, Rushton T, Santone D, Sazzad ABMR, Schnee RW, Scovell PR, Shaw S, Shutt TA, Silk JJ, Silva C, Sinev G, Smith R, Solmaz M, Solovov VN, Sorensen P, Soria J, Stancu I, Stevens A, Stifter K, Suerfu B, Sumner TJ, Swanson N, Szydagis M, Taylor WC, Taylor R, Temples DJ, Terman PAet al., 2022, Cosmogenic production of 37Ar in the context of the LUX-ZEPLIN experiment, Physical Review D, Vol: 105, Pages: 1-8, ISSN: 2470-0010

We estimate the amount of 37Ar produced in natural xenon via cosmic-ray-induced spallation, an inevitable consequence of the transportation and storage of xenon on the Earth’s surface. We then calculate the resulting 37Ar concentration in a 10-tonne payload (similar to that of the LUX-ZEPLIN experiment) assuming a representative schedule of xenon purification, storage, and delivery to the underground facility. Using the spallation model by Silberberg and Tsao, the sea-level production rate of 37Ar in natural xenon is estimated to be 0.024  atoms/kg/day. Assuming the xenon is successively purified to remove radioactive contaminants in 1-tonne batches at a rate of 1  tonne/month, the average 37Ar activity after 10 tons are purified and transported underground is 0.058−0.090  μBq/kg, depending on the degree of argon removal during above-ground purification. Such cosmogenic 37Ar will appear as a noticeable background in the early science data, while decaying with a 35-day half-life. This newly noticed production mechanism of 37Ar should be considered when planning for future liquid-xenon-based experiments.

Journal article

Akerib DS, Akerlof CW, Akimov DY, Alquahtani A, Alsum SK, Anderson TJ, Angelides N, Araujo HM, Arbuckle A, Armstrong JE, Arthurs M, Auyeung H, Aviles S, Bai X, Bailey AJ, Balajthy J, Balashov S, Bang J, Barry MJ, Bauer D, Bauer P, Baxter A, Belle J, Beltrame P, Bensinger J, Benson T, Bernard EP, Bernstein A, Bhatti A, Biekert A, Biesiadzinski TP, Birch HJ, Birrittella B, Boast KE, Bolozdynya AI, Boulton EM, Boxer B, Bramante R, Branson S, Bras P, Breidenbach M, Brew CAJ, Buckley JH, Bugaev VV, Bunker R, Burdin S, Busenitz JK, Cabrita R, Campbell JS, Carels C, Carlsmith DL, Carlson B, Carmona-Benitez MC, Cascella M, Chan C, Cherwinka JJ, Chiller AA, Chiller C, Chott NI, Cole A, Coleman J, Colling D, Conley RA, Cottle A, Coughlen R, Cox G, Craddock WW, Curran D, Currie A, Cutter JE, da Cunha JP, Dahl CE, Dardin S, Dasu S, Davis J, Davison TJR, de Viveiros L, Decheine N, Dobi A, Dobson JEY, Druszkiewicz E, Dushkin A, Edberg TK, Edwards WR, Edwards BN, Edwards J, Elnimr MM, Emmet WT, Eriksen SR, Faham CH, Fan A, Fayer S, Fiorucci S, Flaecher H, Florang IMF, Ford P, Francis VB, Fraser ED, Froborg F, Fruth T, Gaitskell RJ, Gantos NJ, Garcia D, Gehman VM, Gelfand R, Genovesi J, Gerhard RM, Ghag C, Gibson E, Gilchriese MGD, Gokhale S, Gomber B, Gonda TG, Greenall A, Greenwood S, Gregerson G, van der Grinten MGD, Gwilliam CB, Hall CR, Hamilton D, Hans S, Hanzel K, Harrington T, Harrison A, Harrison J, Hasselkus C, Haselschwardt SJ, Hemer D, Hertel SA, Heise J, Hillbrand S, Hitchcock O, Hjemfelt C, Hoff MD, Holbrook B, Holtom E, Hor JY-K, Horn M, Huang DQ, Hurteau TW, Ignarra CM, Irving MN, Jacobsen RG, Jahangir O, Jeffery SN, Ji W, Johnson M, Johnson J, Johnson P, Jones WG, Kaboth AC, Kamaha A, Kamdin K, Kasey V, Kazkaz K, Keefner J, Khaitan D, Khaleeq M, Khazov A, Khromov AV, Khurana I, Kim YD, Kim WT, Kocher CD, Kodroff D, Konovalov AM, Korley L, Korolkova EV, Koyuncu M, Kras J, Kraus H, Kravitz SW, Krebs HJ, Kreczko L, Krikler B, Kudryavtsev VA, Kumpan AV, Kyre S, Lambertet al., 2022, The LUX-ZEPLIN (LZ) radioactivity and cleanliness control programs (vol 80, 1044, 2020), EUROPEAN PHYSICAL JOURNAL C, Vol: 82, ISSN: 1434-6044

Journal article

Akerib DS, Al Musalhi AK, Alsum SK, Amarasinghe CS, Ames A, Anderson TJ, Angelides N, Araujo HM, Armstrong JE, Arthurs M, Bai X, Balajthy J, Balashov S, Bang J, Bargemann JW, Bauer D, Baxter A, Beltrame P, Bernard EP, Bernstein A, Bhatti A, Biekert A, Biesiadzinski TP, Birch HJ, Blockinger GM, Bodnia E, Boxer B, Brew CAJ, Bras P, Burdin S, Busenitz JK, Buuck M, Cabrita R, Carmona-Benitez MC, Cascella M, Chan C, Chott N, Cole A, Converse M, Cottle A, Cox G, Creaner O, Cutter JE, Dahl CE, de Viveiros L, Dobson JEY, Druszkiewicz E, Eriksen SR, Fan A, Fayer S, Fearon NM, Fiorucci S, Flaecher H, Fraser ED, Fruth T, Gaitskell RJ, Genovesi J, Ghag C, Gibson E, Gokhale S, van der Grinten MGD, Gwilliam CB, Hall CR, Hardy CA, Haselschwardt SJ, Hertel SA, Horn M, Huang DQ, Ignarra CM, Jahangir O, James RS, Ji W, Johnson J, Kaboth AC, Kamaha AC, Kamdin K, Kazkaz K, Khaitan D, Khazov A, Khurana I, Kodroff D, Korley L, Korolkova E, Kraus H, Kravitz S, Kreczko L, Krikler B, Kudryavtsev VA, Leason EA, Lee J, Leonard DS, Lesko KT, Levy C, Li J, Liao J, Lindote A, Linehan R, Lippincott WH, Liu X, Lopes M, Asamar EL, Paredes BL, Lorenzon W, Luitz S, Majewski PA, Manalaysay A, Manenti L, Mannino RL, Marangou N, McCarthy ME, McKinsey DN, McLaughlin J, Miller EH, Mizrachi E, Monte A, Monzani ME, Morad JA, Mendoza JDM, Morrison E, Mount BJ, Murphy ASJ, Naim D, Naylor A, Nedlik C, Nelson HN, Neves F, Nikoleyczik JA, Nilima A, Nguyen A, Olcina I, Oliver-Mallory KC, Pal S, Palladino KJ, Palmer J, Patton S, Parveen N, Pease EK, Penning B, Pereira G, Piepke A, Qie Y, Reichenbacher J, Rhyne CA, Richards A, Riffard Q, Rischbieter GRC, Rosero R, Rossiter P, Santone D, Sazzad ABMR, Schnee RW, Scovell PR, Shaw S, Shutt TA, Silk JJ, Silva C, Smith R, Solmaz M, Solovov VN, Sorensen P, Soria J, Stancu I, Stevens A, Stifter K, Suerfu B, Sumner TJ, Swanson N, Szydagis M, Taylor WC, Taylor R, Temples DJ, Terman PA, Tiedt DR, Timalsina M, To WH, Tovey DR, Tripathi M, Tronstad DR, Turner W, Utku U, Vaitkuset al., 2021, Projected sensitivities of the LUX-ZEPLIN experiment to new physics via low-energy electron recoils, Physical Review D: Particles, Fields, Gravitation and Cosmology, Vol: 104, Pages: 1-16, ISSN: 1550-2368

LUX-ZEPLIN is a dark matter detector expected to obtain world-leading sensitivity to weakly-interacting massive particles interacting via nuclear recoils with a ∼7-tonne xenon target mass. This paper presents sensitivity projections to several low-energy signals of the complementary electron recoil signal type: 1) an effective neutrino magnetic moment, and 2) an effective neutrino millicharge, both for pp-chain solar neutrinos, 3) an axion flux generated by the Sun, 4) axionlike particles forming the Galactic dark matter, 5) hidden photons, 6) mirror dark matter, and 7) leptophilic dark matter. World-leading sensitivities are expected in each case, a result of the large 5.6 t 1000 d exposure and low expected rate of electron-recoil backgrounds in the <100  keV energy regime. A consistent signal generation, background model and profile-likelihood analysis framework is used throughout.

Journal article

Akerib DS, Al Musalhi AK, Alsum SK, Amarasinghe CS, Ames A, Anderson TJ, Angelides N, Araújo HM, Armstrong JE, Arthurs M, Bai X, Balajthy J, Balashov S, Bang J, Bargemann JW, Bauer D, Baxter A, Beltrame P, Bernard EP, Bernstein A, Bhatti A, Biekert A, Biesiadzinski TP, Birch HJ, Blockinger GM, Bodnia E, Boxer B, Brew CAJ, Brás P, Burdin S, Busenitz JK, Buuck M, Cabrita R, Carmona-Benitez MC, Cascella M, Chan C, Chott NI, Cole A, Converse MV, Cottle A, Cox G, Creaner O, Cutter JE, Dahl CE, de Viveiros L, Dobson JEY, Druszkiewicz E, Eriksen SR, Fan A, Fayer S, Fearon NM, Fiorucci S, Flaecher H, Fraser ED, Fruth T, Gaitskell RJ, Genovesi J, Ghag C, Gibson E, Gokhale S, van der Grinten MGD, Gwilliam CB, Hall CR, Haselschwardt SJ, Hertel SA, Horn M, Huang DQ, gnarra MCI, Jahangir O, James RS, Ji W, Johnson J, Kaboth AC, Kamaha AC, Kamdin K, Kazkaz K, Khaitan D, Khazov A, Khurana I, Kodroff D, Korley L, Korolkova EV, Kraus H, Kravitz S, Kreczko L, Krikler B, Kudryavtsev VA, Leason EA, Lee J, Leonard DS, Lesko KT, Levy C, Liao J, Lin J, Lindote A, Linehan R, Lippincott WH, Liu X, Lopes MI, López Asamar E, López Paredes B, Lorenzon W, Luitz S, Majewski PA, Manalaysay A, Manenti L, Mannino RL, Marangou N, McCarthy ME, McKinsey DN, McLaughlin J, Miller EH, Mizrachi E, Monte A, Monzani ME, Morad JA, Morales Mendoza JD, Morrison E, Mount BJ, Murphy ASJ, Naim D, Naylor A, Nedlik C, Nelson HN, Neves F, Nikoleyczik JA, Nilima A, Olcina I, Oliver-Mallory KC, Pal S, Palladino KJ, Palmer J, Patton S, Parveen N, Pease EK, Penning B, Pereira G, Piepke A, Qie Y, Reichenbacher J, Rhyne CA, Richards A, Riffard Q, Rischbieter GRC, Rosero R, Rossiter P, Santone D, Sazzad ABMR, Schnee RW, Scovell PR, Shaw S, Shutt TA, Silk JJ, Silva C, Smith R, Solmaz M, Solovov VN, Sorensen P, Soria J, Stancu I, Stevens A, Stifter K, Suerfu B, Sumner TJ, Swanson N, Szydagis M, Taylor WC, Taylor R, Temples DJ, Terman PA, Tiedt DR, Timalsina M, To WH, Tovey DR, Tripathi M, Tronstad DR, Turner W, Utku U, Vaitket al., 2021, Projected sensitivity of the LUX-ZEPLIN experiment to the two-neutrino and neutrinoless double β decays of Xe134, Physical Review C, Vol: 104, Pages: 1-11, ISSN: 2469-9985

The projected sensitivity of the LUX-ZEPLIN (LZ) experiment to two-neutrino and neutrinoless double β decay of 134Xe is presented. LZ is a 10-tonne xenon time-projection chamber optimized for the detection of dark matter particles and is expected to start operating in 2021 at Sanford Underground Research Facility, USA. Its large mass of natural xenon provides an exceptional opportunity to search for the double β decay of 134Xe, for which xenon detectors enriched in 136Xe are less effective. For the two-neutrino decay mode, LZ is predicted to exclude values of the half-life up to 1.7×1024 years at 90% confidence level (CL) and has a three-sigma observation potential of 8.7×1023 years, approaching the predictions of nuclear models. For the neutrinoless decay mode LZ, is projected to exclude values of the half-life up to 7.3×1024 years at 90% CL.

Journal article

Akerib DS, Alsum S, Araujo HM, Bai X, Balajthy J, Bang J, Baxter A, Bernard EP, Bernstein A, Biesiadzinski TP, Boulton EM, Boxer B, Bras P, Burdin S, Byram D, Carmona-Benitez MC, Chan C, Cutter JE, de Viveiros L, Druszkiewicz E, Fan A, Fiorucci S, Gaitskell RJ, Ghag C, Gilchriese MGD, Gwilliam C, Hall CR, Haselschwardt SJ, Hertel SA, Hogan DP, Horn M, Huang DQ, Ignarra CM, Jacobsen RG, Jahangir O, Ji W, Kamdin K, Kazkaz K, Khaitan D, Korolkova E, Kravitz S, Kudryavtsev VA, Leason E, Lenardo BG, Lesko KT, Liao J, Lin J, Lindote A, Lopes M, Manalaysay A, Mannino RL, Marangou N, McKinsey DN, Mei D-M, Morad JA, Murphy ASJ, Naylor A, Nehrkorn C, Nelson HN, Neves F, Nilima A, Oliver-Mallory KC, Palladino KJ, Rhyne C, Riffard Q, Rischbieter GRC, Rossiter P, Shaw S, Shutt TA, Silva C, Solmaz M, Solovov VN, Sorensen P, Sumner TJ, Swanson N, Szydagis M, Taylor DJ, Taylor R, Taylor WC, Tennyson BP, Terman PA, Tiedt DR, To WH, Tvrznikova L, Utku U, Vacheret A, Vaitkus A, Velan V, Webb RC, White JT, Whitis TJ, Witherell MS, Wolfs FLH, Woodward D, Xiang X, Xu J, Zhang Cet al., 2021, Constraints on effective field theory couplings using 311.2 days of LUX data, Physical Review D: Particles, Fields, Gravitation and Cosmology, Vol: 104, Pages: 1-19, ISSN: 1550-2368

We report here the results of a nonrelativistic effective field theory (EFT) WIMP search analysis using LUX data. We build upon previous LUX analyses by extending the search window to include nuclear recoil energies up to ∼180  keVnr, requiring a reassessment of data quality criteria and background models. In order to use an unbinned profile likelihood statistical framework, the development of new analysis techniques to account for higher-energy backgrounds was required. With a 3.14×104  kg⋅day exposure using data collected between 2014 and 2016, we find our data is compatible with the background expectation and set 90% C.L. exclusion limits on nonrelativistic EFT WIMP-nucleon couplings, improving upon previous LUX results and providing constraints on a EFT WIMP interactions using the {neutron,proton} interaction basis. Additionally, we report exclusion limits on inelastic EFT WIMP-isoscalar recoils that are competitive and world-leading for several interaction operators.

Journal article

Akerib DS, Alsum S, Araujo HM, Bai X, Balajthy J, Bang J, Baxter A, Bernard EP, Bernstein A, Biesiadzinski TP, Boulton EM, Boxer B, Bras P, Burdin S, Byram D, Carmona-Benitez MC, Chan C, Cutter JE, de Viveiros L, Druszkiewicz E, Fan A, Fiorucci S, Gaitskell RJ, Ghag C, Gilchriese MGD, Gwilliam C, Hall CR, Haselschwardt SJ, Hertel SA, Hogan DP, Horn M, Huang DQ, Ignarra CM, Jacobsen RG, Jahangir O, Ji W, Kamdin K, Kazkaz K, Khaitan D, Korolkova E, Kravitz S, Kudryavtsev VA, Leason E, Lenardo BG, Lesko KT, Liao J, Lin J, Lindote A, Lopes M, Manalaysay A, Mannino RL, Marangou N, McKinsey DN, Mei D-M, Morad JA, Murphy ASJ, Naylor A, Nehrkorn C, Nelson HN, Neves F, Nilima A, Oliver-Mallory KC, Palladino KJ, Rhyne C, Riffard Q, Rischbieter GRC, Rossiter P, Shaw S, Shutt TA, Silva C, Solmaz M, Solovov VN, Sorensen P, Sumner TJ, Swanson N, Szydagis M, Taylor DJ, Taylor R, Taylor WC, Tennyson BP, Terman PA, Tiedt DR, To WH, Tvrznikova L, Utku U, Vacheret A, Vaitkus A, Velan V, Webb RC, White JT, Whitis TJ, Witherell MS, Wolfs FLH, Woodward D, Xiang X, Xu J, Zhang Cet al., 2021, Improving sensitivity to low-mass dark matter in LUX using a novel electrode background mitigation technique, Physical Review D: Particles, Fields, Gravitation and Cosmology, Vol: 104, Pages: 1-15, ISSN: 1550-2368

This paper presents a novel technique for mitigating electrode backgrounds that limit the sensitivity of searches for low-mass dark matter (DM) using xenon time projection chambers. In the Large Underground Xenon (LUX) detector, signatures of low-mass DM interactions would be very low-energy (∼keV) scatters in the active target that ionize only a few xenon atoms and seldom produce detectable scintillation signals. In this regime, extra precaution is required to reject a complex set of low-energy electron backgrounds that have long been observed in this class of detector. Noticing backgrounds from the wire grid electrodes near the top and bottom of the active target are particularly pernicious, we develop a machine learning technique based on ionization pulse shape to identify and reject these events. We demonstrate the technique can improve Poisson limits on low-mass DM interactions by a factor of 1.7–3 with improvement depending heavily on the size of ionization signals. We use the technique on events in an effective 5 tonne·day exposure from LUX’s 2013 science operation to place strong limits on low-mass DM particles with masses in the range mχ∈0.15–10  GeV. This machine learning technique is expected to be useful for near-future experiments, such as LUX-ZEPLIN and XENONnT, which hope to perform low-mass DM searches with the stringent background control necessary to make a discovery.

Journal article

Akerib DS, Alsum S, Araujo HM, Bai X, Balajthy J, Baxter A, Bernard EP, Bernstein A, Biesiadzinski TP, Boulton EM, Boxer B, Bras P, Burdin S, Byram D, Carmona-Benitez MC, Chan C, Cutter JE, de Viveiros L, Druszkiewicz E, Fan A, Fiorucci S, Gaitskell RJ, Ghag C, Gilchriese MGD, Gwilliam C, Hall CR, Haselschwardt SJ, Hertel SA, Hogan DP, Horn M, Huang DQ, Ignarra CM, Jacobsen RG, Jahangir O, Ji W, Kamdin K, Kazkaz K, Khaitan D, Korolkova E, Kravitz S, Kudryavtsev VA, Leason E, Lenardo BG, Lesko KT, Liao J, Lin J, Lindote A, Lopes M, Manalaysay A, Mannino RL, Marangou N, McKinsey DN, Mei D-M, Moongweluwan M, Morad JA, Murphy ASJ, Naylor A, Nehrkorn C, Nelson HN, Neves F, Nilima A, Oliver-Mallory KC, Palladino KJ, Pease EK, Riffard Q, Rischbieter GRC, Rhyne C, Rossiter P, Shaw S, Shutt TA, Silva C, Solmaz M, Solovov VN, Sorensen P, Sumner TJ, Szydagis M, Taylor DJ, Taylor R, Taylor WC, Tennyson BP, Terman PA, Tiedt DR, To WH, Tvrznikova L, Utku U, Uvarov S, Vacheret A, Velan V, Webb RC, White JT, Whitis TJ, Witherell MS, Wolfs FLH, Woodward D, Xu J, Zhang Cet al., 2020, Discrimination of electronic recoils from nuclear recoils in two-phase xenon time projection chambers, Physical Review D: Particles, Fields, Gravitation and Cosmology, Vol: 102, Pages: 1-27, ISSN: 1550-2368

We present a comprehensive analysis of electronic recoil vs nuclear recoil discrimination in liquid/gas xenon time projection chambers, using calibration data from the 2013 and 2014–2016 runs of the Large Underground Xenon experiment. We observe strong charge-to-light discrimination enhancement with increased event energy. For events with S1=120 detected photons, i.e., equivalent to a nuclear recoil energy of ∼100  keV, we observe an electronic recoil background acceptance of <10−5 at a nuclear recoil signal acceptance of 50%. We also observe modest electric field dependence of the discrimination power, which peaks at a field of around 300  V/cm over the range of fields explored in this study (50–500  V/cm). In the weakly interacting massive particle search region of S1=1−80  phd, the minimum electronic recoil leakage we observe is (7.3±0.6)×10−4, which is obtained for a drift field of 240–290  V/cm. Pulse shape discrimination is utilized to improve our results, and we find that, at low energies and low fields, there is an additional reduction in background leakage by a factor of up to 3. We develop an empirical model for recombination fluctuations which, when used alongside the Noble Element Scintillation Technique simulation package, correctly reproduces the skewness of the electronic recoil data. We use this updated simulation to study the width of the electronic recoil band, finding that its dominant contribution comes from electron-ion recombination fluctuations, followed in magnitude of contribution by fluctuations in the S1 signal, fluctuations in the S2 signal, and fluctuations in the total number of quanta produced for a given energy deposition.

Journal article

Akerib DS, Akerlof CW, Akimov DY, Alquahtani A, Alsum SK, Anderson TJ, Angelides N, Araujo HM, Arbuckle A, Armstrong JE, Arthurs M, Auyeung H, Aviles S, Bai X, Bailey AJ, Balajthy J, Balashov S, Bang J, Barry MJ, Bauer D, Bauer P, Baxter A, Belle J, Beltrame P, Bensinger J, Benson T, Bernard EP, Bernstein A, Bhatti A, Biekert A, Biesiadzinski TP, Birch HJ, Birrittella B, Boast KE, Bolozdynya AI, Boulton EM, Boxer B, Bramante R, Branson S, Bras P, Breidenbach M, Brew CAJ, Buckley JH, Bugaev VV, Bunker R, Burdin S, Busenitz JK, Cabrita R, Campbell JS, Carels C, Carlsmith DL, Carlson B, Carmona-Benitez MC, Cascella M, Chan C, Cherwinka JJ, Chiller AA, Chiller C, Chott NI, Cole A, Coleman J, Colling D, Conley RA, Cottle A, Coughlen R, Cox G, Craddock WW, Curran D, Currie A, Cutter JE, Da Cunha JP, Dahl CE, Dardin S, Dasu S, Davis J, Davison TJR, de Viveiros L, Decheine N, Dobi A, Dobson JEY, Druszkiewicz E, Dushkin A, Edberg TK, Edwards WR, Edwards BN, Edwards J, Elnimr MM, Emmet WT, Eriksen SR, Faham CH, Fan A, Fayer S, Fiorucci S, Flaecher H, Florang IMF, Ford P, Francis VB, Fraser ED, Froborg F, Fruth T, Gaitskell RJ, Gantos NJ, Garcia D, Gehman VM, Gelfand R, Genovesi J, Gerhard RM, Ghag C, Gibson E, Gilchriese MGD, Gokhale S, Gomber B, Gonda TG, Greenall A, Greenwood S, Gregerson G, van der Grinten MGD, Gwilliam CB, Hall CR, Hamilton D, Hans S, Hanzel K, Harrington T, Harrison A, Harrison J, Hasselkus C, Haselschwardt SJ, Hemer D, Hertel SA, Heise J, Hillbrand S, Hitchcock O, Hjemfelt C, Hoff MD, Holbrook B, Holtom E, Hor JY-K, Horn M, Huang DQ, Hurteau TW, Ignarra CM, Irving MN, Jacobsen RG, Jahangir O, Jeffery SN, Ji W, Johnson M, Johnson J, Johnson P, Jones WG, Kaboth AC, Kamaha A, Kamdin K, Kasey V, Kazkaz K, Keefner J, Khaitan D, Khaleeq M, Khazov A, Khromov AV, Khurana I, Kim YD, Kim WT, Kocher CD, Kodroff D, Konovalov AM, Korley L, Korolkova EV, Koyuncu M, Kras J, Kraus H, Kravitz SW, Krebs HJ, Kreczko L, Krikler B, Kudryavtsev VA, Kumpan AV, Kyre S, Lambertet al., 2020, The LUX-ZEPLIN (LZ) radioactivity and cleanliness control programs, European Physical Journal C: Particles and Fields, Vol: 80, Pages: 1-52, ISSN: 1124-1861

LUX-ZEPLIN (LZ) is a second-generation direct dark matter experiment with spin-independent WIMP-nucleon scattering sensitivity above 1.4×10−48cm2 for a WIMP mass of 40GeV/c2 and a 1000days exposure. LZ achieves this sensitivity through a combination of a large 5.6t fiducial volume, active inner and outer veto systems, and radio-pure construction using materials with inherently low radioactivity content. The LZ collaboration performed an extensive radioassay campaign over a period of six years to inform material selection for construction and provide an input to the experimental background model against which any possible signal excess may be evaluated. The campaign and its results are described in this paper. We present assays of dust and radon daughters depositing on the surface of components as well as cleanliness controls necessary to maintain background expectations through detector construction and assembly. Finally, examples from the campaign to highlight fixed contaminant radioassays for the LZ photomultiplier tubes, quality control and quality assurance procedures through fabrication, radon emanation measurements of major sub-systems, and bespoke detector systems to assay scintillator are presented.

Journal article

Akerib DS, Alsum S, Araujo HM, Bai X, Balajthy J, Baxter A, Bernard EP, Bernstein A, Biesiadzinski TP, Boulton EM, Boxer B, Bras P, Burdin S, Byram D, Carmona-Benitez MC, Chan C, Cutter JE, de Viveiros L, Druszkiewicz E, Fan A, Fiorucci S, Gaitskell RJ, Ghag C, Gilchriese MGD, Gwilliam C, Hall CR, Haselschwardt SJ, Hertel SA, Hogan DP, Horn M, Huang DQ, Ignarra CM, Jacobsen RG, Jahangir O, Ji W, Kamdin K, Kazkaz K, Khaitan D, Korolkova E, Kravitz S, Kudryavtsev VA, Leason E, Lenardo BG, Lesko KT, Liao J, Lin J, Lindote A, Lopes M, Manalaysay A, Mannino RL, Marangou N, McKinsey DN, Mei D-M, Moongweluwan M, Morad JA, Murphy ASJ, Naylor A, Nehrkorn C, Nelson HN, Neves F, Nilima A, Oliver-Mallory KC, Palladino KJ, Pease EK, Riffard Q, Rischbieter GRC, Rhyne C, Rossiter P, Shaw S, Shutt TA, Silva C, Solmaz M, Solovov VN, Sorensen P, Sumner TJ, Szydagis M, Taylor DJ, Taylor R, Taylor WC, Tennyson BP, Terman PA, Tiedt DR, To WH, Tvrznikova L, Utku U, Uvarov S, Vacheret A, Velan V, Webb RC, White JT, Whitis TJ, Witherell MS, Wolfs FLH, Woodward D, Xu J, Zhang Cet al., 2020, Investigation of background electron emission in the LUX detector, Physical Review D: Particles, Fields, Gravitation and Cosmology, Vol: 102, Pages: 1-17, ISSN: 1550-2368

Dual-phase xenon detectors, as currently used in direct detection dark matter experiments, have observed elevated rates of background electron events in the low energy region. While this background negatively impacts detector performance in various ways, its origins have only been partially studied. In this paper we report a systematic investigation of the electron pathologies observed in the LUX dark matter experiment. We characterize different electron populations based on their emission intensities and their correlations with preceding energy depositions in the detector. By studying the background under different experimental conditions, we identified the leading emission mechanisms, including photoionization and the photoelectric effect induced by the xenon luminescence, delayed emission of electrons trapped under the liquid surface, capture and release of drifting electrons by impurities, and grid electron emission. We discuss how these backgrounds can be mitigated in LUX and future xenon-based dark matter experiments.

Journal article

Akerib DS, Alsum S, Araujo HM, Bai X, Balajthy J, Baxter A, Bernard EP, Bernstein A, Biesiadzinski TP, Boulton EM, Boxer B, Bras P, Burdin S, Byram D, Carmona-Benitez MC, Chan C, Cutter JE, de Viveiros L, Druszkiewicz E, Fan A, Fiorucci S, Gaitskell RJ, Ghag C, Gilchriese MGD, Gwilliam C, Hall CR, Haselschwardt SJ, Hertel SA, Hogan DP, Horn M, Huang DQ, Ignarra CM, Jacobsen RG, Jahangir O, Ji W, Kamdin K, Kazkaz K, Khaitan D, Korolkova E, Kravitz S, Kudryavtsev VA, Leason E, Lenardo BG, Lesko KT, Liao J, Lin J, Lindote A, Lopes M, Manalaysay A, Mannino RL, Marangou N, Marzioni MF, McKinsey DN, Mei D-M, Moongweluwan M, Morad JA, Murphy AS, Naylor A, Nehrkorn C, Nelson HN, Neves F, Nilima A, Oliver-Mallory KC, Palladino KJ, Pease EK, Riffard Q, Rischbieter GRC, Rhyne C, Rossiter P, Shaw S, Shutt TA, Silva C, Solmaz M, Solovov VN, Sorensen P, Sumner TJ, Szydagis M, Taylor DJ, Taylor R, Taylor WC, Tennyson BP, Terman PA, Tiedt DR, To WH, Tripathi M, Tvrznikova L, Utku U, Uvarov S, Vacheret A, Velan V, Webb RC, White JT, Whitis TJ, Witherell MS, Wolfs FLH, Woodward D, Xu J, Zhang Cet al., 2020, Search for two neutrino double electron capture of(124)Xe and(126)Xe in the full exposure of the LUX detector, Journal of Physics G: Nuclear and Particle Physics, Vol: 47, Pages: 1-13, ISSN: 0954-3899

Two-neutrino double electron capture is a process allowed in the standard model of particle physics. This rare decay has been observed in 78Kr, 130Ba and more recently in 124Xe. In this publication we report on the search for this process in 124Xe and 126Xe using the full exposure of the large underground xenon (LUX) experiment, in a total of 27769.5 kg-days. No evidence of a signal was observed, allowing us to set 90% C.L. lower limits for the half-lives of these decays of 2.0 × 1021 years for 124Xe and 1.9 × 1021 years for 126Xe.

Journal article

Akerib DS, Akerlof CW, Alqahtani A, Alsum SK, Anderson TJ, Angelides N, Araújo HM, Armstrong JE, Arthurs M, Bai X, Balajthy J, Balashov S, Bang J, Baxter A, Bensinger J, Bernard EP, Bernstein A, Bhatti A, Biekert A, Biesiadzinski TP, Birch HJ, Boast KE, Boxer B, Brás P, Buckley JH, Bugaev VV, Burdin S, Busenitz JK, Cabrita R, Carels C, Carlsmith DL, Carmona-Benitez MC, Cascella M, Chan C, Chott NI, Cole A, Cottle A, Cutter JE, Dahl CE, de Viveiros L, Dobson JEY, Druszkiewicz E, Edberg TK, Eriksen SR, Fan A, Fiorucci S, Flaecher H, Fraser ED, Fruth T, Gaitskell RJ, Genovesi J, Ghag C, Gibson E, Gilchriese MGD, Gokhale S, van der Grinten MGD, Hall CR, Harrison A, Haselschwardt SJ, Hertel SA, Hor JY-K, Horn M, Huang DQ, Ignarra CM, Jahangir O, Ji W, Johnson J, Kaboth AC, Kamaha AC, Kamdin K, Kazkaz K, Khaitan D, Khazov A, Khurana I, Kocher CD, Korley L, Korolkova EV, Kras J, Kraus H, Kravitz S, Kreczko L, Krikler B, Kudryavtsev VA, Leason EA, Lee J, Leonard DS, Lesko KT, Levy C, Li J, Liao J, Liao F-T, Lin J, Lindote A, Linehan R, Lippincott WH, Liu R, Liu X, Loniewski C, Lopes MI, López Paredes B, Lorenzon W, Luitz S, Lyle JM, Majewski PA, Manalaysay A, Manenti L, Mannino RL, Marangou N, Marzioni MF, McKinsey DN, McLaughlin J, Meng Y, Miller EH, Mizrachi E, Monte A, Monzani ME, Morad JA, Morrison E, Mount BJ, Murphy ASJ, Naim D, Naylor A, Nedlik C, Nehrkorn C, Nelson HN, Neves F, Nikoleyczik JA, Nilima A, O'Sullivan K, Olcina I, Oliver-Mallory KC, Pal S, Palladino KJ, Palmer J, Parveen N, Pease EK, Penning B, Pereira G, Pushkin K, Reichenbacher J, Rhyne CA, Riffard Q, Rischbieter GRC, Rosero R, Rossiter P, Rutherford G, Santone D, Sazzad ABMR, Schnee RW, Schubnell M, Seymour D, Shaw S, Shutt TA, Silk JJ, Silva C, Smith R, Solmaz M, Solovov VN, Sorensen P, Stancu I, Stevens A, Stifter K, Sumner TJ, Swanson N, Szydagis M, Tan M, Taylor WC, Taylor R, Temples DJ, Terman PA, Tiedt DR, Timalsina M, Tomás A, Tripathi M, Tronstad DR, Turner W, Tvrznikova L, Utku U, Vacheret Aet al., 2020, Projected sensitivity of the LUX-ZEPLIN experiment to the 0νββ decay of 136Xe, Physical Review C, Vol: 102, Pages: 014602 – 1-014602 – 13, ISSN: 2469-9985

The LUX-ZEPLIN (LZ) experiment will enable a neutrinoless double β decay search in parallel to the main science goal of discovering dark matter particle interactions. We report the expected LZ sensitivity to 136Xe neutrinoless double β decay, taking advantage of the significant (>600 kg) 136Xe mass contained within the active volume of LZ without isotopic enrichment. After 1000 live-days, the median exclusion sensitivity to the half-life of 136Xe is projected to be 1.06×1026 years (90% confidence level), similar to existing constraints. We also report the expected sensitivity of a possible subsequent dedicated exposure using 90% enrichment with 136Xe at 1.06×1027 years.

Journal article

Araújo H, 2020, Revised performance parameters of the ZEPLIN-III dark matter experiment, Publisher: arXiv

This note presents revised detector parameters applicable to data from theFirst Science Run of the ZEPLIN-III dark matter experiment; these datasets wereacquired in 2008 and reanalised in 2011. This run demonstrated electron recoildiscrimination in liquid xenon at the level of 1 part in 10,000 below 40 keVnuclear recoil energy, at an electric field of 3.8 kV/cm; this remains the bestdiscrimination reported for this medium to date. Building on relevantmeasurements published in recent years, the calibration of the scintillationand ionisation responses for both electron and nuclear recoils, which had beenmapped linearly to Co-57 gamma-ray interactions, is converted here into opticalparameters which are better suited to relate the data to the emerging liquidxenon response models. Additional information is given on the fitting of theelectron and nuclear recoil populations at low energy. The aim of this note isto support the further development of these models with valuable data acquiredat high field.

Working paper

Collaboration TLUX-ZEPLIN, Akerib DS, Akerlof CW, Alquahtani A, Alsum SK, Anderson TJ, Angelides N, Araújo HM, Armstrong JE, Arthurs M, Bai X, Balajthy J, Balashov S, Bang J, Bauer D, Baxter A, Bensinger J, Bernard EP, Bernstein A, Bhatti A, Biekert A, Biesiadzinski TP, Birch HJ, Boast KE, Boxer B, Brás P, Buckley JH, Bugaev VV, Burdin S, Busenitz JK, Cabrita R, Carels C, Carlsmith DL, Carmona-Benitez MC, Cascella M, Chan C, Chott NI, Cole A, Cottle A, Cutter JE, Dahl CE, Viveiros LD, Dobson JEY, Druszkiewicz E, Edberg TK, Eriksen SR, Fan A, Fayer S, Fiorucci S, Flaecher H, Fraser ED, Fruth T, Gaitskell RJ, Genovesi J, Ghag C, Gibson E, Gilchriese MGD, Gokhale S, Grinten MGDVD, Hall CR, Harrison A, Haselschwardt SJ, Hertel SA, Hor JY-K, Horn M, Huang DQ, Ignarra CM, Jahangir O, Ji W, Johnson J, Kaboth AC, Kamaha AC, Kamdin K, Kazkaz K, Khaitan D, Khazov A, Khurana I, Kocher CD, Korley L, Korolkova EV, Kras J, Kraus H, Kravitz S, Kreczko L, Krikler B, Kudryavtsev VA, Leason EA, Lee J, Leonard DS, Lesko KT, Levy C, Li J, Liao J, Liao F-T, Lin J, Lindote A, Linehan R, Lippincott WH, Liu R, Liu X, Loniewski C, Lopes MI, Paredes BL, Lorenzon W, Luitz S, Lyle JM, Majewski PA, Manalaysay A, Manenti L, Mannino RL, Marangou N, Marzioni MF, McKinsey DN, McLaughlin J, Meng Y, Miller EH, Mizrachi E, Monte A, Monzani ME, Morad JA, Morrison E, Mount BJ, Murphy ASJ, Naim D, Naylor A, Nedlik C, Nehrkorn C, Nelson HN, Neves F, Nikoleyczik JA, Nilima A, Olcina I, Oliver-Mallory KC, Pal S, Palladino KJ, Palmer J, Parveen N, Pease EK, Penning B, Pereira G, Piepke A, Pushkin K, Reichenbacher J, Rhyne CA, Richards A, Riffard Q, Rischbieter GRC, Rosero R, Rossiter P, Rutherford G, Santone D, Sazzad ABMR, Schnee RW, Schubnell M, Seymour D, Shaw S, Shutt TA, Silk JJ, Silva C, Smith R, Solmaz M, Solovov VN, Sorensen P, Stancu I, Stevens A, Stifter K, Sumner TJ, Swanson N, Szydagis M, Tan M, Taylor WC, Taylor R, Temples DJ, Terman PA, Tiedt DR, Timalsina M, Tomás A, Tripathi M, Tronstad DR Tet al., 2020, Simulations of Events for the LUX-ZEPLIN (LZ) Dark Matter Experiment, Astroparticle Physics, ISSN: 0927-6505

The LUX-ZEPLIN dark matter search aims to achieve a sensitivity to theWIMP-nucleon spin-independent cross-section down to (1-2) $\times$ $10^{-12}$pb at a WIMP mass of 40 GeV/$c^2$. This paper describes the simulationsframework that, along with radioactivity measurements, was used to support thisprojection, and also to provide mock data for validating reconstruction andanalysis software. Of particular note are the event generators, which allow usto model the background radiation, and the detector response physics used inthe production of raw signals, which can be converted into digitized waveformssimilar to data from the operational detector. Inclusion of the detectorresponse allows us to process simulated data using the same analysis routinesas developed to process the experimental data.

Journal article

Akerib DS, Alsum S, Araújo HM, Bai X, Balajthy J, Baxter A, Bernard EP, Bernstein A, Biesiadzinski TP, Boulton EM, Boxer B, Brás P, Burdin S, Byram D, Carmona-Benitez MC, Chan C, Cutter JE, Viveiros LD, Druszkiewicz E, Fan A, Fiorucci S, Gaitskell RJ, Ghag C, Gilchriese MGD, Gwilliam C, Hall CR, Haselschwardt SJ, Hertel SA, Hogan DP, Horn M, Huang DQ, Ignarra CM, Jacobsen RG, Jahangir O, Ji W, Kamdin K, Kazkaz K, Khaitan D, Korolkova EV, Kravitz S, Kudryavtsev VA, Larsen NA, Leason E, Lenardo BG, Lesko KT, Liao J, Lin J, Lindote A, Lopes MI, Manalaysay A, Mannino RL, Marangou N, McKinsey DN, Mei D-M, Moongweluwan M, Morad JA, Murphy ASJ, Naylor A, Nehrkorn C, Nelson HN, Neves F, Nilima A, Oliver-Mallory KC, Palladino KJ, Pease EK, Riffard Q, Rischbieter GRC, Rhyne C, Rossiter P, Shaw S, Shutt TA, Silva C, Solmaz M, Solovov VN, Sorensen P, Sumner TJ, Szydagis M, Taylor DJ, Taylor R, Taylor WC, Tennyson BP, Terman PA, Tiedt DR, To WH, Tvrznikova L, Utku U, Uvarov S, Vacheret A, Velan V, Webb RC, White JT, Whitis TJ, Witherell MS, Wolfs FLH, Woodward D, Xu J, Zhang Cet al., 2020, An effective field theory analysis of the first LUX dark matter search, Publisher: arXiv

The Large Underground Xenon (LUX) dark matter search was a 250-kg active massdual-phase time projection chamber that operated by detecting light andionization signals from particles incident on a xenon target. In December 2015,LUX reported a minimum 90% upper C.L. of 6e-46 cm^2 on the spin-independentWIMP-nucleon elastic scattering cross section based on a 1.4e4 kg*day exposurein its first science run. Tension between experiments and the absence of adefinitive positive detection suggest it would be prudent to search for WIMPsoutside the standard spin-independent/spin-dependent paradigm. Recenttheoretical work has identified a complete basis of 14 independent effectivefield theory (EFT) operators to describe WIMP-nucleon interactions. In additionto spin-independent and spin-dependent nuclear responses, these operators canproduce novel responses such as angular-momentum-dependent and spin-orbitcouplings. Here we report on a search for all 14 of these EFT couplings withdata from LUX's first science run. Limits are placed on each coupling as afunction of WIMP mass.

Working paper

El-Neaj YA, Alpigiani C, Amairi-Pyka S, Araujo H, Balaz A, Bassi A, Bathe-Peters L, Battelier B, Belic A, Bentine E, Bernabeu J, Bertoldi A, Bingham R, Blas D, Bolpasi V, Bongs K, Bose S, Bouyer P, Bowcock T, Bowden W, Buchmueller O, Burrage C, Calmet X, Canuel B, Caramete L-I, Carroll A, Cella G, Charmandaris V, Chattopadhyay S, Chen X, Chiofalo ML, Coleman J, Cotter J, Cui Y, Derevianko A, De Roeck A, Djordjevic GS, Dornan P, Doser M, Drougkakis I, Dunningham J, Dutan I, Easo S, Elertas G, Ellis J, El Sawy M, Fassi F, Felea D, Feng C-H, Flack R, Foot C, Fuentes I, Gaaloul N, Gauguet A, Geiger R, Gibson V, Giudice G, Goldwin J, Grachov O, Graham PW, Grasso D, Van der Grinten M, Guendogan M, Haehnelt MG, Harte T, Hees A, Hobson R, Hogan J, Holst B, Holynski M, Kasevich M, Kavanagh BJ, Von Klitzing W, Kovachy T, Krikler B, Krutzik M, Lewicki M, Lien Y-H, Liu M, Luciano GG, Magnon A, Mahmoud MA, Malik S, McCabe C, Mitchell J, Pahl J, Pal D, Pandey S, Papazoglou D, Paternostro M, Penning B, Peters A, Prevedelli M, Puthiya-Veettil V, Quenby J, Rasel E, Ravenhall S, Ringwood J, Roura A, Sabulsky D, Sameed M, Sauer B, Schaffer SA, Schiller S, Schkolnik V, Schlippert D, Schubert C, Sfar HR, Shayeghi A, Shipsey I, Signorini C, Singh Y, Soares-Santos M, Sorrentino F, Sumner T, Tassis K, Tentindo S, Tino GM, Tinsley JN, Unwin J, Valenzuela T, Vasilakis G, Vaskonen V, Vogt C, Webber-Date A, Wenzlawski A, Windpassinger P, Woltmann M, Yazgan E, Zhan M-S, Zou X, Zupan Jet al., 2020, AEDGE: Atomic Experiment for Dark Matter and Gravity Exploration in Space, EPJ QUANTUM TECHNOLOGY, Vol: 7, ISSN: 2662-4400

Journal article

Akerib DS, Akerlof CW, Alsum SK, Araujo HM, Arthurs M, Bai X, Bailey AJ, Balajthy J, Balashov S, Bauer D, Belle J, Beltrame P, Benson T, Bernard EP, Biesiadzinski TP, Boast KE, Boxer B, Bras P, Buckley JH, Bugaev VV, Burdin S, Busenitz JK, Carels C, Carlsmith DL, Carlson B, Carmona-Benitez MC, Chan C, Cherwinka JJ, Cole A, Cottle A, Craddock WW, Currie A, Cutter JE, Dahl CE, de Viveiros L, Dobi A, Dobson JEY, Druszkiewicz E, Edberg TK, Edwards WR, Fan A, Fayer S, Fiorucci S, Fruth T, Gaitskell RJ, Genovesi J, Ghag C, Gilchriese MGD, van der Grinten MGD, Hall CR, Hans S, Hanzel K, Haselschwardt SJ, Hertel SA, Hillbrand S, Hjemfelt C, Hoff MD, Hor JY-K, Huang DQ, Ignarra CM, Ji W, Kaboth AC, Kamdin K, Keefner J, Khaitan D, Khazov A, Kim YD, Kocher CD, Korolkova E, Kraus H, Krebs HJ, Kreczko L, Krikler B, Kudryavtsev VA, Kyre S, Lee J, Lenardo BG, Leonard DS, Lesko KT, Levy C, Li J, Liao J, Liao F-T, Lin J, Lindote A, Linehan R, Lippincott WH, Liu X, Lopes M, Paredes BL, Lorenzon W, Luitz S, Lyle JM, Majewski P, Manalaysay A, Mannino RL, Maupin C, McKinsey DN, Meng Y, Miller EH, Mock J, Monzani ME, Morad JA, Morrison E, Mount BJ, Murphy ASJ, Nelson HN, Neves F, Nikoleyczik J, O'Sullivan K, Olcina I, Olevitch MA, Oliver-Mallory KC, Palladino KJ, Patton SJ, Pease EK, Penning B, Piepke A, Powell S, Preece RM, Pushkin K, Ratcliff BN, Reichenbacher J, Rhyne CA, Richards A, Rodrigues JP, Rosero R, Rossiter P, Saba JS, Sarychev M, Schnee RW, Schubnell M, Scovell PR, Shaw S, Shutt TA, Silk JJ, Silva C, Skarpaas K, Skulski W, Solmaz M, Solovov VN, Sorensen P, Stancu I, Stark MR, Stiegler TM, Stifter K, Szydagis M, Taylor WC, Taylor R, Taylor DJ, Temples D, Terman PA, Thomas KJ, Timalsina M, To WH, Tomas A, Tope TE, Tripathi M, Tull CE, Tvrznikova L, Utku U, Vavra J, Vacheret A, Verbus JR, Voirin E, Waldron WL, Watson JR, Webb RC, White DT, Whitis TJ, Wisniewski WJ, Witherell MS, Wolfs FLH, Woodward D, Worm SD, Yeh M, Yin J, Young Iet al., 2020, Projected WIMP sensitivity of the LUX-ZEPLIN dark matter experiment, Physical Review D: Particles, Fields, Gravitation and Cosmology, Vol: 101, Pages: 1-17, ISSN: 1550-2368

LUX-ZEPLIN (LZ) is a next-generation dark matter direct detection experiment that will operate 4850 feet underground at the Sanford Underground Research Facility (SURF) in Lead, South Dakota, USA. Using a two-phase xenon detector with an active mass of 7 tonnes, LZ will search primarily for low-energy interactions with weakly interacting massive particles (WIMPs), which are hypothesized to make up the dark matter in our galactic halo. In this paper, the projected WIMP sensitivity of LZ is presented based on the latest background estimates and simulations of the detector. For a 1000 live day run using a 5.6-tonne fiducial mass, LZ is projected to exclude at 90% confidence level spin-independent WIMP-nucleon cross sections above 1.4×10−48  cm2 for a 40  GeV/c2 mass WIMP. Additionally, a 5σ discovery potential is projected, reaching cross sections below the exclusion limits of recent experiments. For spin-dependent WIMP-neutron(-proton) scattering, a sensitivity of 2.3×10−43  cm2 (7.1×10−42  cm2) for a 40  GeV/c2 mass WIMP is expected. With underground installation well underway, LZ is on track for commissioning at SURF in 2020.

Journal article

Akerib DS, Akerlof CW, Alsum SK, Angelides N, Araujo HM, Armstrong JE, Arthurs M, Bai X, Balajthy J, Balashov S, Baxter A, Bernard EP, Biekert A, Biesiadzinski TP, Boast KE, Boxer B, Bras P, Buckley JH, Bugaev VV, Burdin S, Busenitz JK, Carels C, Carlsmith DL, Carmona-Benitez MC, Cascella M, Chan C, Cole A, Cottle A, Cutter JE, Dahl CE, de Viveiros L, Dobson JEY, Druszkiewicz E, Edberg TK, Fan A, Fiorucci S, Flaecher H, Fruth T, Gaitskell RJ, Genovesi J, Ghag C, Gilchriese MGD, Gokhale S, van der Grinten MGD, Hall CR, Hans S, Harrison J, Haselschwardt SJ, Hertel SA, Hor JY-K, Horn M, Huang DQ, Ignarra CM, Jahangir O, Ji W, Johnson J, Kaboth AC, Kamdin K, Khaitan D, Khazov A, Kim WT, Kocher CD, Korley L, Korolkova E, Kras J, Kraus H, Kravitz SW, Kreczko L, Krikler B, Kudryavtsev VA, Leason EA, Lee J, Leonard DS, Lesko KT, Levy C, Li J, Liao J, Liao F-T, Lin J, Lindote A, Linehan R, Lippincott WH, Liu R, Liu X, Loniewski C, Lopes M, Paredes BL, Lorenzon W, Luitz S, Lyle JM, Majewski PA, Manalaysay A, Manenti L, Mannino RL, Marangou N, Marzioni MF, McKinsey DN, McLaughlin J, Meng Y, Miller EH, Monzani ME, Morad JA, Morrison E, Mount BJ, Murphy ASJ, Naim D, Naylor A, Nedlik C, Nehrkorn C, Nelson HN, Neves F, Nikoleyczik J, Nilima A, Olcina I, Oliver-Mallory KC, Pal S, Palladino KJ, Pease EK, Penning BP, Pereira G, Piepke A, Pushkin K, Reichenbacher J, Rhyne CA, Riffard Q, Rischbieter GRC, Rodrigues JP, Rosero R, Rossiter P, Rutherford G, Sazzad ABMR, Schnee RW, Schubnell M, Scovell PR, Seymour D, Shaw S, Shutt TA, Silk JJ, Silva C, Solmaz M, Solovov VN, Sorensen P, Stancul I, Stevens A, Stiegler TM, Stifter K, Szydagis M, Taylor WC, Taylors R, Temples D, Terman PA, Tiedt DR, Timalsina M, Tomas A, Tripathi M, Tvrznikova L, Utku U, Uvarov S, Vacheret A, Wang JJ, Watson JR, Webb RC, White RG, Whitis TJ, Wolfs FLH, Woodward D, Yin Jet al., 2020, Measurement of the gamma ray background in the Davis cavern at the Sanford Underground Research Facility, Astroparticle Physics, Vol: 116, Pages: 1-10, ISSN: 0927-6505

Deep underground environments are ideal for low background searches due to the attenuation of cosmic rays by passage through the earth. However, they are affected by backgrounds from γ-rays emitted by 40K and the 238U and 232Th decay chains in the surrounding rock. The LUX-ZEPLIN (LZ) experiment will search for dark matter particle interactions with a liquid xenon TPC located within the Davis campus at the Sanford Underground Research Facility, Lead, South Dakota, at the 4850-foot level. In order to characterise the cavern background, in-situ γ-ray measurements were taken with a sodium iodide detector in various locations and with lead shielding. The integral count rates (0–3300 keV) varied from 596 Hz to 1355 Hz for unshielded measurements, corresponding to a total flux from the cavern walls of 1.9 ± 0.4 γ cms. The resulting activity in the walls of the cavern can be characterised as 220 ± 60 Bq/kg of 40K, 29 ± 15 Bq/kg of 238U, and 13 ± 3 Bq/kg of 232Th.

Journal article

Collaboration TLUX, Akerib DS, Alsum S, Araújo HM, Bai X, Balajthy J, Baxter A, Bernard EP, Bernstein A, Biesiadzinski TP, Boulton EM, Boxer B, Brás P, Burdin S, Byram D, Carmona-Benitez MC, Chan C, Cutter JE, Viveiros LD, Druszkiewicz E, Fan A, Fiorucci S, Gaitskell RJ, Ghag C, Gilchriese MGD, Gwilliam C, Hall CR, Haselschwardt SJ, Hertel SA, Hogan DP, Horn M, Huang DQ, Ignarra CM, Jacobsen RG, Jahangir O, Ji W, Kamdin K, Kazkaz K, Khaitan D, Korolkova EV, Kravits S, Kudryavtsev VA, Leason E, Lenardo BG, Lesko KT, Liao J, Lin J, Lindote A, Lopes MI, Manalaysay A, Mannino RL, Marangou N, Marzioni MF, McKinsey DN, Mei DM, Moongweluwan M, Morad JA, Murphy ASJ, Naylor A, Nehrkorn C, Nelson HN, Neves F, Nilima A, Oliver-Mallory KC, Palladino KJ, Pease EK, Riffard Q, Rischbieter GRC, Rhyne C, Rossiter P, Shaw S, Shutt TA, Silva C, Solmaz M, Solovov VN, Sorensen P, Sumner TJ, Szydagis M, Taylor DJ, Taylor R, Taylor WC, Tennyson BP, Terman PA, Tiedt DR, To WH, Tripathi M, Tvrznikova L, Utku U, Uvarov S, Vacheret A, Velan V, Webb RC, White JT, Whitis TJ, Witherell MS, Wolfs FLH, Woodward D, Xu J, Zhang Cet al., 2020, Improved modeling of $β$ electronic recoils in liquid xenon using LUX calibration data, Journal of Instrumentation, ISSN: 1748-0221

We report here methods and techniques for creating and improving a model thatreproduces the scintillation and ionization response of a dual-phase liquid andgaseous xenon time-projection chamber. Starting with the recent release of theNoble Element Simulation Technique (NEST v2.0), electronic recoil data from the$\beta$ decays of ${}^3$H and ${}^{14}$C in the Large Underground Xenon (LUX)detector were used to tune the model, in addition to external data sets thatallow for extrapolation beyond the LUX data-taking conditions. This paper alsopresents techniques used for modeling complicated temporal and spatial detectorpathologies that can adversely affect data using a simplified model framework.The methods outlined in this report show an example of the robust applicationspossible with NEST v2.0, while also providing the final electronic recoil modeland detector parameters that will used in the new analysis package, the LUXLegacy Analysis Monte Carlo Application (LLAMA), for accurate reproduction ofthe LUX data. As accurate background reproduction is crucial for the success ofrare-event searches, such as dark matter direct detection experiments, thetechniques outlined here can be used in other single-phase and dual-phase xenondetectors to assist with accurate ER background reproduction.

Journal article

Akerib DS, Akerlof CW, Akimov DY, Alquahtani A, Alsum SK, Anderson TJ, Angelides N, Araujo HM, Arbuckle A, Armstrong JE, Arthurs M, Auyeung H, Bai X, Bailey AJ, Balajthy J, Balashov S, Bang J, Barry MJ, Barthel J, Bauer D, Bauer P, Baxter A, Belle J, Beltrame P, Bensinger J, Benson T, Bernard EP, Bernstein A, Bhatti A, Biekert A, Biesiadzinski TP, Birrittella B, Boast KE, Bolozdynya A, Boulton EM, Boxer B, Bramante R, Branson S, Bras P, Breidenbach M, Buckley JH, Bugaev VV, Bunker R, Burdin S, Busenitz JK, Campbell JS, Carels C, Carlsmith DL, Carlson B, Carmona-Benitez MC, Cascella M, Chan C, Cherwinka JJ, Chiller AA, Chiller C, Chott N, Cole A, Coleman J, Colling D, Conley RA, Cottle A, Coughlen R, Craddock WW, Curran D, Currie A, Cutter JE, da Cunha JP, Dahl CE, Dardin S, Dasu S, Davis J, Davison TJR, de Viveiros L, Decheine N, Dobi A, Dobson JEY, Druszkiewicz E, Dushkin A, Edberg TK, Edwards WR, Edwards BN, Edwards J, Elnimr MM, Emmet WT, Eriksen SR, Faham CH, Fan A, Fayer S, Fiorucci S, Flaecher H, Florang IMF, Ford P, Francis VB, Froborg F, Fruth T, Gaitskell RJ, Gantos NJ, Garcia D, Geffre A, Gehman VM, Gelfand R, Genovesi J, Gerhard RM, Ghag C, Gibson E, Gilchriese MGD, Gokhale S, Gomber B, Gonda TG, Greenall A, Greenwood S, Gregerson G, van der Grinten MGD, Gwilliam CB, Hall CR, Hamilton D, Hans S, Hanzel K, Harrington T, Harrison A, Hasselkus C, Haselschwardt SJ, Hemer D, Hertel SA, Heise J, Hillbrand S, Hitchcock O, Hjemfelt C, Hoff MD, Holbrook B, Holtom E, Hor JY-K, Horn M, Huang DQ, Hurteau TW, Ignarra CM, Irving MN, Jacobsen RG, Jahangir O, Jeffery SN, Ji W, Johnson M, Johnson J, Johnson P, Jones WG, Kaboth AC, Kamaha A, Kamdin K, Kasey V, Kazkaz K, Keefner J, Khaitan D, Khaleeq M, Khazov A, Khromov A, Khurana I, Kim YD, Kim WT, Kocher CD, Konovalov AM, Korley L, Korolkova E, Koyuncu M, Kras J, Kraus H, Kravitz SW, Krebs HJ, Kreczko L, Krikler B, Kudryavtsev VA, Kumpan A, Kyre S, Lambert AR, Landerud B, Larsen NA, Laundrie A, Leason EA, Lee HS, Lee Jet al., 2020, The LUX-ZEPLIN (LZ) experiment, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, Vol: 953, Pages: 1-22, ISSN: 0168-9002

We describe the design and assembly of the LUX-ZEPLIN experiment, a direct detection search for cosmic WIMP dark matter particles. The centerpiece of the experiment is a large liquid xenon time projection chamber sensitive to low energy nuclear recoils. Rejection of backgrounds is enhanced by a Xe skin veto detector and by a liquid scintillator Outer Detector loaded with gadolinium for efficient neutron capture and tagging. LZ is located in the Davis Cavern at the 4850’ level of the Sanford Underground Research Facility in Lead, South Dakota, USA. We describe the major subsystems of the experiment and its key design features and requirements.

Journal article

Akerib DS, Alsum S, Araujo HM, Bai X, Balajthy J, Baxter A, Beltrame P, Bernard EP, Bernstein A, Biesiadzinski TP, Boulton EM, Boxer B, Bras P, Burdin S, Byram D, Carmona-Benitez MC, Chan C, Cutter JE, de Viveiros L, Druszkiewicz E, Fallon SR, Fan A, Fiorucci S, Gaitskell RJ, Genovesi J, Ghag C, Gilchriese MGD, Gwilliam C, Hall CR, Haselschwardt SJ, Hertel SA, Hogan DP, Horn M, Huang DQ, Ignarra CM, Jacobsen RG, Jahangir O, Ji W, Kamdin K, Kazkaz K, Khaitan D, Korolkova EV, Kravitz S, Kudryavtsev VA, Leason E, Lenardo BG, Lesko KT, Lin JLJ, Lindote A, Lopes MI, Paredes BL, Manalaysay A, Mannino RL, Marangou N, Marzioni MF, McKinsey DN, Mei DM, Moongweluwan M, Morad JA, Murphy ASJ, Naylor A, Nehrkorn C, Nelson HN, Neves F, Nilima A, Oliver-Mallory KC, Palladino KJ, Pease EK, Riffard Q, Rischbieter GRC, Rhyne C, Rossiter P, Shaw S, Shutt TA, Silva C, Solmaz M, Solovov VN, Sorensen P, Sumner TJ, Szydagis M, Taylor DJ, Taylor R, Taylor WC, Tennyson BP, Terman PA, Tiedt DR, To WH, Tripathi M, Tvrznikova L, Utku U, Uvarov S, Vacheret A, Velan V, Webb RC, White JT, Whitis TJ, Witherell MS, Wolfs FLH, Woodward D, Xu J, Zhang Cet al., 2020, Extending light WIMP searches to single scintillation photons in LUX, Physical Review D: Particles, Fields, Gravitation and Cosmology, Vol: 101, Pages: 1-11, ISSN: 1550-2368

We present a novel analysis technique for liquid xenon time projection chambers that allows for a lower threshold by relying on events with a prompt scintillation signal consisting of single detected photons. The energy threshold of the LUX dark matter experiment is primarily determined by the smallest scintillation response detectable, which previously required a twofold coincidence signal in its photomultiplier arrays, enforced in data analysis. The technique presented here exploits the double photoelectron emission effect observed in some photomultiplier models at vacuum ultraviolet wavelengths. We demonstrate this analysis using an electron recoil calibration dataset and place new constraints on the spin-independent scattering cross section of weakly interacting massive particles (WIMPs) down to 2.5  GeV/c2 WIMP mass using the 2013 LUX dataset. This new technique is promising to enhance light WIMP and astrophysical neutrino searches in next-generation liquid xenon experiments.

Journal article

Akerib DS, Alsum S, Araujo HM, Bai X, Balajthy J, Baxter A, Bernard EP, Bernstein A, Biesiadzinski TP, Boulton EM, Boxer B, Bras P, Burdin S, Byram D, Carmona-Benitez MC, Chan C, Cutter JE, de Viveiros L, Druszkiewicz E, Fan A, Fiorucci S, Gaitskell RJ, Ghag C, Gilchriese MGD, Gwilliam C, Hall CR, Haselschwardt SJ, Hertel SA, Hogan DP, Horn M, Huang DQ, Ignarra CM, Jacobsen RG, Jahangir O, Ji W, Kamdin K, Kazkaz K, Khaitan D, Korolkova EV, Kravitz S, Kudryavtsev VA, Leason E, Lenardo BG, Lesko KT, Liao J, Lin J, Lindote A, Lopes MI, Manalaysay A, Mannino RL, Marangou N, Marzioni MF, McKinsey DN, Mei D-M, Moongweluwan M, Morad JA, Murphy ASJ, Naylor A, Nehrkorn C, Nelson HN, Neves F, Nilima A, Oliver-Mallory KC, Palladino KJ, Pease EK, Riffard Q, Rischbieter GRC, Rhyne C, Rossiter P, Shaw S, Shutt TA, Silva C, Solmaz M, Solovov VN, Sorensen P, Sumner TJ, Szydagis M, Taylor DJ, Taylor R, Taylor WC, Tennyson BP, Terman PA, Tiedt DR, To WH, Tripathi M, Tvrznikova L, Utku U, Uvarov S, Vacheret A, Velan V, Webb RC, White JT, Whitis TJ, Witherell MS, Wolfs FLH, Woodward D, Xu J, Zhang Cet al., 2020, First direct detection constraint on mirror dark matter kinetic mixing using LUX 2013 data, Physical Review D: Particles, Fields, Gravitation and Cosmology, Vol: 101, Pages: 012003 – 1-012003 – 8, ISSN: 1550-2368

We present the results of a direct detection search for mirror dark matter interactions, using data collected from the Large Underground Xenon experiment during 2013, with an exposure of 95 live−days×118  kg. Here, the calculations of the mirror electron scattering rate in liquid xenon take into account the shielding effects from mirror dark matter captured within the Earth. Annual and diurnal modulation of the dark matter flux and atomic shell effects in xenon are also accounted for. Having found no evidence for an electron recoil signal induced by mirror dark matter interactions we place an upper limit on the kinetic mixing parameter over a range of local mirror electron temperatures between 0.1 and 0.9 keV. This limit shows significant improvement over the previous experimental constraint from orthopositronium decays and significantly reduces the allowed parameter space for the model. We exclude mirror electron temperatures above 0.3 keV at a 90% confidence level, for this model, and constrain the kinetic mixing below this temperature.

Journal article

This data is extracted from the Web of Science and reproduced under a licence from Thomson Reuters. You may not copy or re-distribute this data in whole or in part without the written consent of the Science business of Thomson Reuters.

Request URL: http://wlsprd.imperial.ac.uk:80/respub/WEB-INF/jsp/search-html.jsp Request URI: /respub/WEB-INF/jsp/search-html.jsp Query String: respub-action=search.html&id=00359053&limit=30&person=true