Publications

Search or filter publications

Search publications Search

Filter by type:

Filter by publication type

• Book
• Book chapter
• Conference paper
• Journal article
• Other
• Patent
• Poster
• Report
• Scholarly edition
• Software
• Thesis dissertation
• Working paper

Filter by year:

Filter from 2025202420232022202120202019201820172016201520142013201220112010200920082007200620052004200320022001200019991998199719961995199419931992199119901989198819871986198519841983198219811980197919781977197619751974197319721971197019691968196719661965 to Filter to 2025202420232022202120202019201820172016201520142013201220112010200920082007200620052004200320022001200019991998199719961995199419931992199119901989198819871986198519841983198219811980197919781977197619751974197319721971197019691968196719661965

---

Search results

• Journal article
  Hanany A, Kalveks R, Kumaran G, 2024,

  Quiver polymerisation

  , Journal of High Energy Physics, Vol: 2024

  Two new diagrammatic techniques on 3dN = 4 quiver gauge theories, termed chain and cyclic quiver polymerisation are introduced. These gauge a diagonal SU/U(k) subgroup of the Coulomb branch global symmetry of a quiver (or pair of quivers) with multiple legs. The action on the Coulomb branch is that of a SU/U(k) hyper-Kähler quotient. The polymerisation techniques build and generalise known composition methods from class S. Polymerisation is used to generate a wide range of magnetic quivers from various physical contexts. These include polymerisation constructions for Kronheimer-Nakajima quivers, which generalise the ADHM construction for the moduli space of k SU(N) instantons on ℂ2 to A-type singularities. Also a polymerisation construction of the magnetic quiver for the 6dN = (1, 0) theory coming from two 12 M5 branes probing an E6 Klein singularity. We find a method of extending magnetic quivers for Class S theories to cure the incomplete Higgsing that arises when gluing punctures into the loops associated with higher genus theories. Other novel constructions include a unitary magnetic quiver for the closure of a height four nilpotent orbit of SO(7). We explore the relationships between the Coulomb and Higgs branches of quivers under polymerisation.

  • Abstract
  • Cite
• Journal article
  Braglia M, Calcagni G, Franciolini G, Fumagalli J, Nardini G, Peloso M, Pieroni M, Renaux-Petel S, Ricciardone A, Tasinato G, Vaskonen Vet al., 2024,

  Gravitational waves from inflation in LISA: reconstruction pipeline and physics interpretation

  , Journal of Cosmology and Astroparticle Physics, Vol: 2024

  Various scenarios of cosmic inflation enhance the amplitude of the stochastic gravitational wave background (SGWB) at frequencies detectable by the LISA detector. We develop tools for a template-based analysis of the SGWB and introduce a template databank to describe well-motivated signals from inflation, prototype their template-based searches, and forecast their reconstruction with LISA. Specifically, we classify seven templates based on their signal frequency shape, and we identify representative fundamental physics models leading to them. By running a template-based analysis, we forecast the accuracy with which LISA can reconstruct the template parameters of representative benchmark signals, with and without galactic and extragalactic foregrounds. We identify the parameter regions that can be probed by LISA within each template. Finally, we investigate how our signal reconstructions shed light on fundamental physics models of inflation: we discuss their impact for measurements of e.g., the couplings of inflationary axions to gauge fields; the graviton mass during inflation; the fluctuation seeds of primordial black holes; the consequences of excited states during inflation, and the presence of small-scale spectral features.

  • Abstract
  • Cite
  • Citations: 2
• Journal article
  Arav I, Gauntlett JP, Jiao Y, Roberts MM, Rosen Cet al., 2024,

  Superconformal monodromy defects in ABJM and mABJM theory

  , The Journal of High Energy Physics, Vol: 2024, ISSN: 1029-8479

  We study D = 11 supergravity solutions which are dual to one-dimensional superconformal defects in d = 3 SCFTs. We consider defects in ABJM theory with monodromy for U(1)4 ⊂ SO(8) global symmetry, as well as in 𝒩 = 2 mABJM SCFT, which arises from the RG flow of a mass deformation of ABJM theory, with monodromy for U(1)3 ⊂ SU(3) × U(1) global symmetry. We show that the defects of the two SCFTs are connected by a line of bulk marginal mass deformations and argue that they are also related by bulk RG flow. In all cases we allow for the possibility of conical singularities at the location of the defect. Various physical observables of the defects are computed including the defects conformal weight and the partition function, as well as associated supersymmetric Renyi entropies.

  • Abstract
  • Publisher Web Link
  • Cite
• Journal article
  Ho M, Price HCW, Evans TS, O'Sullivan Eet al., 2024,

  Who made the mRNA vaccine? Measuring division of labor in therapeutic innovation

  , NATURE BIOTECHNOLOGY, Vol: 42, Pages: 1643-1648, ISSN: 1087-0156
  • Cite
• Journal article
  Magueijo J, 2024,

  Mach's principle and dark matter

  , PHYSICS LETTERS B, Vol: 858, ISSN: 0370-2693
  • Cite
• Journal article
  Hanif F, Das D, Halliwell J, Home D, Mazumdar A, Ulbricht H, Bose Set al., 2024,

  Testing Whether Gravity Acts as a Quantum Entity When Measured

  , PHYSICAL REVIEW LETTERS, Vol: 133, ISSN: 0031-9007
  • Cite
• Journal article
  Braglia M, Pieroni M, Marsat S, 2024,

  Impact of a primordial gravitational wave background on LISA resolvable sources

  , PHYSICAL REVIEW D, Vol: 110, ISSN: 2470-0010
  • Cite
• Journal article
  Magueijo J, 2024,

  Spacetime symmetry breaking on nongeodesic leaves and a new form of matter

  , PHYSICAL REVIEW D, Vol: 110, ISSN: 2470-0010
  • Cite
• Journal article
  Leung R, Stelle KS, 2024,

  Localised gravity and resolved braneworlds

  , JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479
  • Cite
• Journal article
  Fredenhagen S, Lausch F, Mkrtchyan K, 2024,

  Interactions of massless fermionic fields in three dimensions

  , PHYSICAL REVIEW D, Vol: 110, ISSN: 2470-0010
  • Cite
• Journal article
  Hull C, Hutt ML, Lindstrom U, 2024,

  Gauge-invariant magnetic charges in linearised gravity

  , CLASSICAL AND QUANTUM GRAVITY, Vol: 41, ISSN: 0264-9381
  • Cite
• Journal article
  Shaw EC, Ade PAR, Akers S, Amiri M, Austermann J, Beall J, Becker DT, Benton SJ, Bergman AS, Bock JJ, Bond JR, Bryan SA, Chiang HC, Contaldi CR, Domagalski RS, Doré O, Duff SM, Duivenvoorden AJ, Eriksen HK, Farhang M, Filippini JP, Fissel LM, Fraisse AA, Freese K, Galloway M, Gambrel AE, Gandilo NN, Ganga K, Gibbs SM, Gourapura S, Grigorian A, Gualtieri R, Gudmundsson JE, Halpern M, Hartley J, Hasselfield M, Hilton G, Holmes W, Hristov VV, Huang Z, Hubmayr J, Irwin KD, Jones WC, Kahn A, Kermish ZD, King C, Kuo CL, Lennox AR, Leung JSY, Li S, Luu TVT, Mason PV, May J, Megerian K, Moncelsi L, Morford TA, Nagy JM, Nie R, Netterfield CB, Nolta M, Osherson B, Padilla IL, Rahlin AS, Redmond S, Reintsema C, Romualdez LJ, Ruhl JE, Runyan MC, Shariff JA, Shiu C, Soler JD, Song X, Tartakovsky S, Thommesen H, Trangsrud A, Tucker C, Turner AD, Ullom J, Van Der List JF, Van Lanen J, Vissers MR, Weber AC, Wehus IK, Wen S, Wiebe DV, Young EYet al., 2024,

  In-flight performance of Spider's 280-GHz receivers

  , Journal of Astronomical Telescopes, Instruments, and Systems, Vol: 10, ISSN: 2329-4124

  Spider is a balloon-borne instrument designed to map the cosmic microwave background at degree-angular scales in the presence of Galactic foregrounds. Spider has mapped a large sky area in the Southern Hemisphere using more than 2000 transition-edge sensors (TESs) during two NASA Long Duration Balloon flights above the Antarctic continent. During its first flight in January 2015, Spider was observed in the 95- and 150-GHz frequency bands, setting constraints on the B-mode signature of primordial gravitational waves. Its second flight in the 2022-2023 season added new receivers at 280 GHz, each using an array of TESs coupled to the sky through feedhorns formed from stacks of silicon wafers. These receivers are optimized to produce deep maps of polarized Galactic dust emission over a large sky area, providing a unique data set with lasting value to the field. We describe the instrument's performance during Spider's second flight, focusing on the performance of the 280-GHz receivers. We include details on the flight, in-band optical loading at float, and an early analysis of detector noise.

  • Abstract
  • Cite
• Journal article
  Caprini C, Jinno R, Lewicki M, Madge E, Merchand M, Nardini G, Pieroni M, Pol AR, Vaskonen Vet al., 2024,

  Gravitational waves from first-order phase transitions in LISA: reconstruction pipeline and physics interpretation

  , JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, ISSN: 1475-7516
  • Cite
• Journal article
  Benetti Genolini P, Gauntlett JP, Jiao Y, Lüscher A, Sparks Jet al., 2024,

  Localization of the free energy in supergravity

  , Physical Review Letters, Vol: 133, ISSN: 0031-9007

  We derive a general formula for the gravitational free energy of Euclidean supersymmetric solutions toD ¼ 4, N ¼ 2 gauged supergravity coupled to vector multiplet matter. This allows one to compute the freeenergy without solving any supergravity equations, just assuming the solutions exist. As well as recoveringsome known results in the literature with ease, we also present new supergravity results that match withholographically dual field theory computations.

  • Abstract
  • Publisher Web Link
  • Cite
• Journal article
  Viegas E, Evans T, Viegas E, Evans TSet al., 2024,

  The Behavioural House Indicator: a faster and real time small-area indicative deprivation measure for England

  , Environment and Planning B: Urban Analytics and City Science, ISSN: 2399-8083

  Researchers have been long preoccupied with the measuring and monitoring of economic and social deprivation at small scales, neighbourhood, level in order to provide official government agencies and policy makers with more precise data insights. Whist valuable methodologies have been developed, the exercise of data collection associated with these methods tends to be expensive, time consuming, published infrequently with significant time delays, and subject to recurring changes to methodology. Here, we propose a novel method based on a straightforward methodology and data sources to generate a faster and real time indicator for deprivation at different scaling, small to larger areas. The results of our work show that our method provides a consistent view of deprivation across the regions of England and Wales, which are in line with the other indexes, but also highlight specific flash points of deep rural and highly dense urban deprivation areas that are not well captured by existing indexes. Our method is intended to aid researchers and policy makers by complementing existing but infrequent indexes.

  • Abstract
  • Publisher Web Link
  • Cite
• Journal article
  Babak S, Falxa M, Franciolini G, Pieroni Met al., 2024,

  Forecasting the sensitivity of pulsar timing arrays to gravitational wave backgrounds

  , Physical Review B, Vol: 110, ISSN: 2469-9950

  Pulsar timing array (PTA) observations hinted towards the existence of a stochastic gravitational wave background (SGWB) in the nHz frequency band. Still, the nature of the SGWB signal cannot be confidently inferred from current data, and the leading explanation invokes mergers of supermassive black holes. If confirmed, such discovery would not only represent a turning point in our understanding of astrophysics, but it may severely limit the capability of searching for additional cosmological sources in the nHz frequency range. In this work, we build a simple framework to forecast the sensitivity of future pulsar timing array configurations and assess the parameter estimation of SGWB, which could consist of several contributions. We release the python code fastpta, implementing this framework and ready to use.

  • Abstract
  • Cite
• Journal article
  Babak S, Falxa M, Franciolini G, Pieroni Met al., 2024,

  Forecasting the sensitivity of pulsar timing arrays to gravitational wave backgrounds

  , PHYSICAL REVIEW D, Vol: 110, ISSN: 2470-0010
  • Cite
• Journal article
  Arav I, Gauntlett JP, Jiao Y, Roberts MM, Rosen Cet al., 2024,

  Superconformal monodromy defects in N=4 SYM andLS theory

  , The Journal of High Energy Physics, Vol: 2024, ISSN: 1029-8479

  We study type IIB supergravity solutions that are dual to two-dimensionalsuperconformal defects in d = 4 SCFTs which preserve N = (0, 2) supersymmetry. Weconsider solutions dual to defects in N = 4 SYM theory that have non-trivial monodromy forU(1)3 ⊂ SO(6) global symmetry and we also allow for the possibility of conical singularities.In addition, we consider the addition of fermionic and bosonic mass terms that have nontrivial dependence on the spatial directions transverse to the defect, while preserving thesuperconformal symmetry of the defect. We compute various physical quantities including thecentral charges of the defect expressed as a function of the monodromy, the on-shell action aswell as associated supersymmetric Rényi entropies. Analogous computations are carried outfor superconformal defects in the N = 1, d = 4 Leigh-Strassler SCFT. We also show thatthe defects of the two SCFTs are connected by a line of bulk marginal mass deformationsand argue that they are also related by bulk RG fow.

  • Abstract
  • Publisher Web Link
  • Cite
• Journal article
  Acharya B, Alexandre J, Behera SC, Benes P, Bergmann B, Bertolucci S, Bevan A, Brancaccio R, Branzas H, Burian P, Campbell M, Cecchini S, Cho YM, de Montigny M, De Roeck A, Ellis JR, Fairbairn M, Felea D, Frank M, Gould O, Hays J, Hirt AM, Ho DL-J, Hung PQ, Janecek J, Kalliokoski M, Lacarrere DH, Leroy C, Levi G, Margiotta A, Maselek R, Maulik A, Mauri N, Mavromatos NE, Millward L, Mitsou VA, Musumeci E, Ostrovskiy I, Ouimet P-P, Papavassiliou J, Patrizii L, Pavalas GE, Pinfold JL, Popa LA, Popa V, Pozzato M, Pospisil S, Rajantie A, de Austri RR, Sahnoun Z, Sakellariadou M, Sakurai K, Sarkar S, Semenoff G, Shaa A, Sirri G, Sliwa K, Soluk R, Spurio M, Staelens M, Suk M, Tenti M, Togo V, Tuszynski JA, Upreti A, Vento V, Vives Oet al., 2024,

  MoEDAL Search in the CMS Beam Pipe for Magnetic Monopoles Produced via the Schwinger Effect

  , PHYSICAL REVIEW LETTERS, Vol: 133, ISSN: 0031-9007
  • Cite
• Journal article
  Seibold FK, Tseytlin AA, 2024,

  Scattering on the supermembrane

  , JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479
  • Cite
• Journal article
  Gill AS, Benton SJ, Damaren CJ, Everett SW, Fraisse AA, Hartley JW, Harvey D, Holder B, Huff EM, Jauzac M, Jones WC, Lagattuta D, Leung JSY, Li L, Luu TVT, Massey R, McCleary JE, Nagy JM, Netterfield CB, Paracha E, Redmond SF, Rhodes JD, Robertson A, Romualdez LJ, Schmoll J, Shaaban MM, Sirks EL, Vassilakis GN, Vitorelli AZet al., 2024,

  SuperBIT Superpressure Flight Instrument Overview and Performance: Near-diffraction-limited Astronomical Imaging from the Stratosphere

  , Astronomical Journal, Vol: 168, ISSN: 0004-6256

  SuperBIT was a 0.5 m near-UV to near-infrared wide-field telescope that launched on a NASA superpressure balloon into the stratosphere from New Zealand for a 45-night flight. SuperBIT acquired multiband images of galaxy clusters to study the properties of dark matter using weak gravitational lensing. We provide an overview of the instrument and its various subsystems. We then present the instrument performance from the flight, including the telescope and image stabilization system, the optical system, the power system, and the thermal system. SuperBIT successfully met the instrument’s technical requirements, achieving a telescope pointing stability of 0.″34 ± 0.″10, a focal plane image stability of 0.″055 ± 0.″027, and a point-spread function FWHM of ∼0.″35 over 5-minute exposures throughout the 45-night flight. The telescope achieved a near-diffraction-limited point-spread function in all three science bands (u, b, and g). SuperBIT served as a pathfinder to the GigaBIT observatory, which will be a 1.34 m near-UV to near-infrared balloon-borne telescope.

  • Abstract
  • Cite
  • Citations: 1
• Journal article
  Etkin A, Magueijo J, Rassouli F-S, 2024,

  Vortices, topology and time

  , Physics Letters B: Nuclear Physics and Particle Physics, Vol: 855, ISSN: 0370-2693

  We relate physical time with the topology of magnetic field vortices. We base ourselves on a formulation of unimodular gravity where the cosmological constant Λ appears as the canonical dual to a variable which on-shell becomes four-volume time. If the theory is restricted to a topological axionic form (viz. a parity-odd product of an electric and a magnetic field), such a time variable becomes the spatial integral of the Chern-Simons density. The latter equates to helicity, so that unimodular time is transmuted into the linking number of the vortices of the topological magnetic field, times their flux. With the added postulate that this flux is a universal constant, the flow of time can thus be interpreted as the progressive weaving of further links between magnetic field vortices, each link providing a quantum of time with value related to the fixed flux. Non-abelian extensions, and targetting parameters other than Λ are briefly examined, exposing different types of vortices and a possible role for inter-linking leading to new phenomenology.

  • Abstract
  • Publisher Web Link
  • Cite
• Journal article
  Jiang H, Tseytlin AA, 2024,

  On co-dimension 2 defect anomalies in <i>N</i>=4 SYM and (2,0) theory via brane probes in AdS/CFT

  , JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479
  • Cite
• Journal article
  Gkountoumis G, Hull C, Vandoren S, 2024,

  Exact moduli spaces for N=2, <i>D</i>=5 freely acting orbifolds

  , JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479
  • Cite
• Journal article
  Hull C, Hutt ML, Lindstrom U, 2024,

  Charges and topology in linearised gravity

  , JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479
  • Cite
• Journal article
  Gonzalez MC, de Rham C, Jaitly S, Pozsgay V, Tokareva Aet al., 2024,

  Positivity-causality competition: a road to ultimate EFT consistency constraints

  , JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479
  • Cite
• Journal article
  Magueijo J, 2024,

  Dark matter and spacetime symmetry restoration

  , Physical Review D: Particles, Fields, Gravitation and Cosmology, Vol: 109, ISSN: 1550-2368

  We examine local physics in the presence of global variables: variables associated with the whole of the spacelike surfaces of a foliation. These could be the (pseudo)constants of nature and their conjugate times, but our statements are more general. Interactions between the local and the global (for example, dependence of the local action on global times dual to constants) degrades full space-time diffeomorphism invariance down to spatial diffeomorphism invariance, and so an extra degree of freedom appears. When these presumably primordial global interactions switch off, the local action recovers full invariance and so the usual two gravitons, but a legacy matter component is left over, bearing the extra degree of freedom. Under the assumption that the preferred foliation is geodesic, this component behaves like dark matter, except that 3 of its 4 local degrees of freedom are frozen, forcing its rest frame to coincide with the preferred foliation. The nonfrozen degree of freedom (the number density of the effective fluid) is the survivor of the extra “graviton” present in the initial theory and keeps memory of all the past global interactions that took place in a given location in the preferred foliation. Such “painted-on” dark matter is best distinguished from the conventional one in situations where the preferred frame would be preposterous if all 4 degrees of freedom of dark matter were available. We provide one example: an outflowing halo of legacy matter with exact escape speed at each point and a very specific profile, surrounding a condensed structure made of normal matter.

  • Abstract
  • Publisher Web Link
  • Cite
• Journal article
  Gerhardinger M, Giblin Jr JT, Tolley AJ, Trodden Met al., 2024,

  Simulating a numerical UV completion of quartic Galileons

  , PHYSICAL REVIEW D, Vol: 109, ISSN: 2470-0010
  • Cite
• Journal article
  Liu X, Santos JE, Wiseman T, 2024,

  New Well-Posed boundary conditions for semi-classical Euclidean gravity

  , JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479
  • Cite
• Journal article
  Basile T, Joung E, Mkrtchyan K, Mojaza Met al., 2024,

  Spinor-helicity representations of particles of any mass in dS 4 and AdS 4 spacetimes

  , PHYSICAL REVIEW D, Vol: 109, ISSN: 2470-0010
  • Cite

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.