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Gu Y, Wu L, Zhu B. Detection of inelastic dark matter via electron recoils in SENSEI. Int J Clin Exp Med 2022. [DOI: 10.1103/physrevd.106.075004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Csáki C, Hong S, Kurup G, Lee SJ, Perelstein M, Xue W. Z-Portal Continuum Dark Matter. PHYSICAL REVIEW LETTERS 2022; 128:081807. [PMID: 35275670 DOI: 10.1103/physrevlett.128.081807] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 12/20/2021] [Accepted: 12/24/2021] [Indexed: 06/14/2023]
Abstract
We examine the possibility that dark matter (DM) consists of a gapped continuum, rather than ordinary particles. A weakly interacting continuum (WIC) model, coupled to the standard model via a Z portal, provides an explicit realization of this idea. The thermal DM relic density in this model is naturally consistent with observations, providing a continuum counterpart of the "WIMP miracle." Direct detection cross sections are strongly suppressed compared to ordinary Z-portal WIMP, thanks to a unique effect of the continuum kinematics. Continuum DM states decay throughout the history of the Universe, and observations of cosmic microwave background place constraints on potential late decays. Production of WICs at colliders can provide a striking cascade-decay signature. We show that a simple Z-portal WIC model provides a fully viable DM candidate consistent with all current experimental constraints.
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Affiliation(s)
- Csaba Csáki
- Department of Physics, LEPP, Cornell University, Ithaca, New York 14853, USA
| | - Sungwoo Hong
- Department of Physics, LEPP, Cornell University, Ithaca, New York 14853, USA
- Department of Physics, The University of Chicago, Chicago, Illinois 60637, USA
- Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Gowri Kurup
- Department of Physics, LEPP, Cornell University, Ithaca, New York 14853, USA
- Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PJ, United Kingdom
| | - Seung J Lee
- Department of Physics, Korea University, Seoul 136-713, Korea
| | - Maxim Perelstein
- Department of Physics, LEPP, Cornell University, Ithaca, New York 14853, USA
| | - Wei Xue
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
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Bell NF, Dent JB, Dutta B, Ghosh S, Kumar J, Newstead JL. Low-mass inelastic dark matter direct detection via the Migdal effect. Int J Clin Exp Med 2021. [DOI: 10.1103/physrevd.104.076013] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Bramante J, Song N. Electric But Not Eclectic: Thermal Relic Dark Matter for the XENON1T Excess. PHYSICAL REVIEW LETTERS 2020; 125:161805. [PMID: 33124868 DOI: 10.1103/physrevlett.125.161805] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 08/13/2020] [Accepted: 09/21/2020] [Indexed: 06/11/2023]
Abstract
The identity of dark matter is being sought with increasingly sensitive and voluminous underground detectors. Recently the XENON1T Collaboration reported excess electronic recoil events, with most of these having recoil energies around 1-30 keV. We show that a straightforward model of inelastic dark matter produced via early Universe thermal freeze-out annihilation can account for the XENON1T excess. Remarkably, this dark matter model consists of a few simple elements: sub-GeV mass Dirac fermion dark matter coupled to a lighter dark photon kinetically mixed with the standard model photon. A scalar field charged under the dark U(1) gauge symmetry can provide a mass for the dark photon and splits the Dirac fermion component state masses by a few keV, which survive in equal abundance and interact inelastically with electrons and nuclei.
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Affiliation(s)
- Joseph Bramante
- The McDonald Institute and Department of Physics, Engineering Physics, and Astronomy, Queen's University, Kingston, Ontario, K7L 2S8, Canada and Perimeter Institute for Theoretical Physics, Waterloo, Ontario, N2L 2Y5, Canada
| | - Ningqiang Song
- The McDonald Institute and Department of Physics, Engineering Physics, and Astronomy, Queen's University, Kingston, Ontario, K7L 2S8, Canada and Perimeter Institute for Theoretical Physics, Waterloo, Ontario, N2L 2Y5, Canada
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Bell NF, Dent JB, Dutta B, Ghosh S, Kumar J, Newstead JL. Explaining the XENON1T Excess with Luminous Dark Matter. PHYSICAL REVIEW LETTERS 2020; 125:161803. [PMID: 33124869 DOI: 10.1103/physrevlett.125.161803] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Accepted: 09/09/2020] [Indexed: 06/11/2023]
Abstract
We show that the excess in electron recoil events seen by the XENON1T experiment can be explained by a relatively low-mass luminous dark matter candidate. The dark matter scatters inelastically in the detector (or the surrounding rock) to produce a heavier dark state with a ∼2-3 keV mass splitting. This heavier state then decays within the detector, producing a peak in the electron recoil spectrum that is a good fit to the observed excess. We comment on the ability of future direct detection experiments to differentiate this model from other "beyond the standard model" scenarios and from possible tritium backgrounds, including the use of diurnal modulation, multichannel signals, etc., as possible distinguishing features of this scenario.
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Affiliation(s)
- Nicole F Bell
- ARC Centre of Excellence for Dark Matter Particle Physics, School of Physics, The University of Melbourne, Victoria 3010, Australia
| | - James B Dent
- Department of Physics, Sam Houston State University, Huntsville, Texas 77341, USA
| | - Bhaskar Dutta
- Mitchell Institute for Fundamental Physics and Astronomy, Department of Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA
| | - Sumit Ghosh
- Mitchell Institute for Fundamental Physics and Astronomy, Department of Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA
| | - Jason Kumar
- Department of Physics, University of Hawaii, Honolulu, Hawaii 96822, USA
| | - Jayden L Newstead
- ARC Centre of Excellence for Dark Matter Particle Physics, School of Physics, The University of Melbourne, Victoria 3010, Australia
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Curtin D, Drewes M, McCullough M, Meade P, Mohapatra RN, Shelton J, Shuve B, Accomando E, Alpigiani C, Antusch S, Carlos Arteaga-Velázquez J, Batell B, Bauer M, Blinov N, Salomé Caballero-Mora K, Hyeok Chang J, Chun EJ, Co RT, Cohen T, Cox P, Craig N, Csáki C, Cui Y, D'Eramo F, Delle Rose L, Bhupal Dev PS, Dienes KR, Dror JA, Essig R, Evans JA, Evans JL, Fernández Tellez A, Fischer O, Flacke T, Fradette A, Frugiuele C, Fuchs E, Gherghetta T, Giudice GF, Gorbunov D, Gupta RS, Hagedorn C, Hall LJ, Harris P, Carlos Helo J, Hirsch M, Hochberg Y, Hook A, Ibarra A, Ipek S, Jung S, Knapen S, Kuflik E, Liu Z, Lombardo S, Lubatti HJ, McKeen D, Molinaro E, Moretti S, Nagata N, Neubert M, Miguel No J, Olaiya E, Perez G, Peskin ME, Pinner D, Pospelov M, Reece M, Robinson DJ, Rodríguez Cahuantzi M, Santonico R, Schlaffer M, Shepherd-Themistocleous CH, Spray A, Stolarski D, Subieta Vasquez MA, Sundrum R, Thamm A, Thomas B, Tsai Y, Tweedie B, West SM, Young C, Yu F, Zaldivar B, Zhang Y, Zurek K, Zurita J. Long-lived particles at the energy frontier: the MATHUSLA physics case. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2019; 82:116201. [PMID: 31185458 DOI: 10.1088/1361-6633/ab28d6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We examine the theoretical motivations for long-lived particle (LLP) signals at the LHC in a comprehensive survey of standard model (SM) extensions. LLPs are a common prediction of a wide range of theories that address unsolved fundamental mysteries such as naturalness, dark matter, baryogenesis and neutrino masses, and represent a natural and generic possibility for physics beyond the SM (BSM). In most cases the LLP lifetime can be treated as a free parameter from the [Formula: see text]m scale up to the Big Bang Nucleosynthesis limit of [Formula: see text] m. Neutral LLPs with lifetimes above [Formula: see text]100 m are particularly difficult to probe, as the sensitivity of the LHC main detectors is limited by challenging backgrounds, triggers, and small acceptances. MATHUSLA is a proposal for a minimally instrumented, large-volume surface detector near ATLAS or CMS. It would search for neutral LLPs produced in HL-LHC collisions by reconstructing displaced vertices (DVs) in a low-background environment, extending the sensitivity of the main detectors by orders of magnitude in the long-lifetime regime. We study the LLP physics opportunities afforded by a MATHUSLA-like detector at the HL-LHC, assuming backgrounds can be rejected as expected. We develop a model-independent approach to describe the sensitivity of MATHUSLA to BSM LLP signals, and compare it to DV and missing energy searches at ATLAS or CMS. We then explore the BSM motivations for LLPs in considerable detail, presenting a large number of new sensitivity studies. While our discussion is especially oriented towards the long-lifetime regime at MATHUSLA, this survey underlines the importance of a varied LLP search program at the LHC in general. By synthesizing these results into a general discussion of the top-down and bottom-up motivations for LLP searches, it is our aim to demonstrate the exceptional strength and breadth of the physics case for the construction of the MATHUSLA detector.
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Affiliation(s)
- David Curtin
- Department of Physics, University of Toronto, Toronto, ON M5S 1A7, Canada
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Curtin D, Dienes KR, Thomas B. Dynamical Dark Matter, MATHUSLA, and the lifetime frontier. Int J Clin Exp Med 2018. [DOI: 10.1103/physrevd.98.115005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Dienes KR, Kumar J, Thomas B, Yaylali D. Off-diagonal dark-matter phenomenology: Exploring enhanced complementarity relations in nonminimal dark sectors. Int J Clin Exp Med 2017. [DOI: 10.1103/physrevd.96.115009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Boddy KK, Dienes KR, Kim D, Kumar J, Park JC, Thomas B. Boxes, boosts, and energy duality: Understanding the Galactic Center gamma-ray excess through Dynamical Dark Matter. Int J Clin Exp Med 2017. [DOI: 10.1103/physrevd.95.055024] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Dienes KR, Fennick J, Kumar J, Thomas B. Randomness in the dark sector: Emergent mass spectra and Dynamical Dark Matter ensembles. Int J Clin Exp Med 2016. [DOI: 10.1103/physrevd.93.083506] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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