Imperial College London

Professor Geoffrey Hall FRS

Faculty of Natural SciencesDepartment of Physics

Professor of Physics
 
 
 
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Contact

 

+44 (0)20 7594 7800g.hall Website

 
 
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Assistant

 

Ms Paula Brown +44 (0)20 7594 7823

 
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Location

 

511ABlackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Tumasyan:2022:10.1103/PhysRevD.105.112007,
author = {Tumasyan, A and Adam, W and Andrejkovic, JW and Bergauer, T and Chatterjee, S and Damanakis, K and Dragicevic, M and Del, Valle AE and Fruhwirth, R and Jeitler, M and Krammer, N and Lechner, L and Liko, D and Mikulec, I and Paulitsch, P and Pitters, FM and Schieck, J and Schofbeck, R and Schwarz, D and Templ, S and Waltenberger, W and Wulz, C-E and Chekhovsky, V and Litomin, A and Makarenko, V and Darwish, MR and De, Wolf EA and Janssen, T and Kello, T and Lelek, A and Sfar, HR and Van, Mechelen P and Van, Putte S and Van, Remortel N and Blekman, F and Bols, ES and D'Hondt, J and Delcourt, M and El, Faham H and Lowette, S and Moortgat, S and Morton, A and Muller, D and Sahasransu, AR and Tavernier, S and Van, Doninck W and Vannerom, D and Beghin, D and Bilin, B and Clerbaux, B and De, Lentdecker G and Favart, L and Kalsi, AK and Lee, K and Mahdavikhorrami, M and Makarenko, I and Moureaux, L and Paredes, S and Petre, L and Popov, A and Postiau, N and Starling, E and Thomas, L and Vanden},
doi = {10.1103/PhysRevD.105.112007},
journal = {Physical Review D: Particles, Fields, Gravitation and Cosmology},
title = {Inclusive nonresonant multilepton probes of new phenomena at root s=13 TeV},
url = {http://dx.doi.org/10.1103/PhysRevD.105.112007},
volume = {105},
year = {2022}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - An inclusive search for nonresonant signatures of beyond the standard model (SM) phenomena in events with three or more charged leptons, including hadronically decaying τ leptons, is presented. The analysis is based on a data sample corresponding to an integrated luminosity of 138  fb−1 of proton-proton collisions at √s=13  TeV, collected by the CMS experiment at the LHC in 2016–2018. Events are categorized based on the lepton and b-tagged jet multiplicities and various kinematic variables. Three scenarios of physics beyond the SM are probed, and signal-specific boosted decision trees are used for enhancing sensitivity. No significant deviations from the background expectations are observed. Lower limits are set at 95% confidence level on the mass of type-III seesaw heavy fermions in the range 845–1065 GeV for various decay branching fraction combinations to SM leptons. Doublet and singlet vectorlike τ lepton extensions of the SM are excluded for masses below 1045 GeV and in the mass range 125–150 GeV, respectively. Scalar leptoquarks decaying exclusively to a top quark and a lepton are excluded below 1.12–1.42 TeV, depending on the lepton flavor. For the type-III seesaw as well as the vectorlike doublet model, these constraints are the most stringent to date. For the vectorlike singlet model, these are the first constraints from the LHC experiments. Detailed results are also presented to facilitate alternative theoretical interpretations.
AU - Tumasyan,A
AU - Adam,W
AU - Andrejkovic,JW
AU - Bergauer,T
AU - Chatterjee,S
AU - Damanakis,K
AU - Dragicevic,M
AU - Del,Valle AE
AU - Fruhwirth,R
AU - Jeitler,M
AU - Krammer,N
AU - Lechner,L
AU - Liko,D
AU - Mikulec,I
AU - Paulitsch,P
AU - Pitters,FM
AU - Schieck,J
AU - Schofbeck,R
AU - Schwarz,D
AU - Templ,S
AU - Waltenberger,W
AU - Wulz,C-E
AU - Chekhovsky,V
AU - Litomin,A
AU - Makarenko,V
AU - Darwish,MR
AU - De,Wolf EA
AU - Janssen,T
AU - Kello,T
AU - Lelek,A
AU - Sfar,HR
AU - Van,Mechelen P
AU - Van,Putte S
AU - Van,Remortel N
AU - Blekman,F
AU - Bols,ES
AU - D'Hondt,J
AU - Delcourt,M
AU - El,Faham H
AU - Lowette,S
AU - Moortgat,S
AU - Morton,A
AU - Muller,D
AU - Sahasransu,AR
AU - Tavernier,S
AU - Van,Doninck W
AU - Vannerom,D
AU - Beghin,D
AU - Bilin,B
AU - Clerbaux,B
AU - De,Lentdecker G
AU - Favart,L
AU - Kalsi,AK
AU - Lee,K
AU - Mahdavikhorrami,M
AU - Makarenko,I
AU - Moureaux,L
AU - Paredes,S
AU - Petre,L
AU - Popov,A
AU - Postiau,N
AU - Starling,E
AU - Thomas,L
AU - Vanden,Bemden M
AU - Vander,Velde C
AU - Vanlaer,P
AU - Cornelis,T
AU - Dobur,D
AU - Knolle,J
AU - Lambrecht,L
AU - Mestdach,G
AU - Niedziela,M
AU - Rendon,C
AU - Roskas,C
AU - Samalan,A
AU - Skovpen,K
AU - Tytgat,M
AU - Vermassen,B
AU - Wezenbeek,L
AU - Benecke,A
AU - Bethani,A
AU - Bruno,G
AU - Bury,F
AU - Caputo,C
AU - David,P
AU - Delaere,C
AU - Donertas,IS
AU - Giammanco,A
AU - Jaffel,K
AU - Jain,S
AU - Lemaitre,V
AU - Mondal,K
AU - Prisciandaro,J
AU - Taliercio,A
AU - Teklishyn,M
AU - Tran,TT
AU - Vischia,P
AU - Wertz,S
AU - Alves,GA
AU - Hensel,C
AU - Moraes,A
AU - Teles,PR
AU - Alda,Junior WL
AU - Gallo,Pereira MA
AU - Ferreira,Filho MB
AU - Malbouisson,HB
AU - Carvalho,W
AU - Chinellato,J
AU - Da,Costa EM
AU - Da,Silveira GG
AU - Damiao,DDJ
AU - Sousa,VDS
AU - De,Souza SF
AU - Herrera,CM
AU - Amarilo,KM
AU - Mundim,L
AU - Nogima,H
AU - Santoro,A
AU - Silva,Do Amaral SM
AU - Sznajder,A
AU - Thiel,M
AU - Da,Silva De Araujo FT
AU - Pereira,AV
AU - Bernardes,CA
AU - Calligaris,L
AU - Fernandez,Perez Tomei TR
AU - Gregores,EM
AU - Lemos,DS
AU - Mercadante,PG
AU - Novaes,SF
AU - Padula,SS
AU - Aleksandrov,A
AU - Antchev,G
AU - Hadjiiska,R
AU - Iaydjiev,P
AU - Misheva,M
AU - Rodozov,M
AU - Shopova,M
AU - Sultanov,G
AU - Dimitrov,A
AU - Ivanov,T
AU - Litov,L
AU - Pavlov,B
AU - Petkov,P
AU - Petrov,A
AU - Cheng,T
AU - Javaid,T
AU - Mittal,M
AU - Yuan,L
AU - Ahmad,M
AU - Bauer,G
AU - Dozen,C
AU - Hu,Z
AU - Martins,J
AU - Wang,Y
AU - Yi,K
AU - Chapon,E
AU - Chen,GM
AU - Chen,HS
AU - Chen,M
AU - Iemmi,F
AU - Kapoor,A
AU - Leggat,D
AU - Liao,H
AU - Liu,Z-A
AU - Milosevic,V
AU - Monti,F
AU - Sharma,R
AU - Tao,J
AU - Thomas-Wilsker,J
AU - Wang,J
AU - Zhang,H
AU - Zhao,J
DO - 10.1103/PhysRevD.105.112007
PY - 2022///
SN - 1550-2368
TI - Inclusive nonresonant multilepton probes of new phenomena at root s=13 TeV
T2 - Physical Review D: Particles, Fields, Gravitation and Cosmology
UR - http://dx.doi.org/10.1103/PhysRevD.105.112007
UR - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000830403500012&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR - https://journals.aps.org/prd/abstract/10.1103/PhysRevD.105.112007
UR - http://hdl.handle.net/10044/1/98917
VL - 105
ER -