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Bagnaschi EA, Buchmueller O, Cavanaugh R, Citron M, De Roeck A, Dolan MJ, Ellis JR, Flächer H, Heinemeyer S, Isidori G, Malik S, Martínez Santos D, Olive KA, Sakurai K, de Vries KJ, Weiglein G. Supersymmetric dark matter after LHC run 1. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS 2015; 75:500. [PMID: 26543400 PMCID: PMC4622175 DOI: 10.1140/epjc/s10052-015-3718-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Accepted: 10/05/2015] [Indexed: 06/05/2023]
Abstract
Different mechanisms operate in various regions of the MSSM parameter space to bring the relic density of the lightest neutralino, [Formula: see text], assumed here to be the lightest SUSY particle (LSP) and thus the dark matter (DM) particle, into the range allowed by astrophysics and cosmology. These mechanisms include coannihilation with some nearly degenerate next-to-lightest supersymmetric particle such as the lighter stau [Formula: see text], stop [Formula: see text] or chargino [Formula: see text], resonant annihilation via direct-channel heavy Higgs bosons H / A, the light Higgs boson h or the Z boson, and enhanced annihilation via a larger Higgsino component of the LSP in the focus-point region. These mechanisms typically select lower-dimensional subspaces in MSSM scenarios such as the CMSSM, NUHM1, NUHM2, and pMSSM10. We analyze how future LHC and direct DM searches can complement each other in the exploration of the different DM mechanisms within these scenarios. We find that the [Formula: see text] coannihilation regions of the CMSSM, NUHM1, NUHM2 can largely be explored at the LHC via searches for [Formula: see text] events and long-lived charged particles, whereas their H / A funnel, focus-point and [Formula: see text] coannihilation regions can largely be explored by the LZ and Darwin DM direct detection experiments. We find that the dominant DM mechanism in our pMSSM10 analysis is [Formula: see text] coannihilation: parts of its parameter space can be explored by the LHC, and a larger portion by future direct DM searches.
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Affiliation(s)
| | - O. Buchmueller
- />High Energy Physics Group, Blackett Laboratory, Imperial College, Prince Consort Road, London, SW7 2AZ UK
| | - R. Cavanaugh
- />Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510 USA
- />Physics Department, University of Illinois at Chicago, Chicago, IL 60607-7059 USA
| | - M. Citron
- />High Energy Physics Group, Blackett Laboratory, Imperial College, Prince Consort Road, London, SW7 2AZ UK
| | - A. De Roeck
- />Physics Department, CERN, 1211 Geneva 23, Switzerland
- />Antwerp University, 2610 Wilrijk, Belgium
| | - M. J. Dolan
- />Theory Group, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025-7090 USA
- />ARC Centre of Excellence for Particle Physics at the Terascale, School of Physics, University of Melbourne, Parkville, 3010 Australia
| | - J. R. Ellis
- />Physics Department, CERN, 1211 Geneva 23, Switzerland
- />Theoretical Particle Physics and Cosmology Group, Department of Physics, King’s College London, London, WC2R 2LS UK
| | - H. Flächer
- />H.H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol, BS8 1TL UK
| | - S. Heinemeyer
- />Instituto de Física de Cantabria (CSIC-UC), 39005 Santander, Spain
| | - G. Isidori
- />Physik-Institut, Universität Zürich, 8057 Zürich, Switzerland
| | - S. Malik
- />High Energy Physics Group, Blackett Laboratory, Imperial College, Prince Consort Road, London, SW7 2AZ UK
| | - D. Martínez Santos
- />Universidade de Santiago de Compostela, 15706 Santiago de Compostela, Spain
| | - K. A. Olive
- />William I. Fine Theoretical Physics Institute, School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455 USA
| | - K. Sakurai
- />Theoretical Particle Physics and Cosmology Group, Department of Physics, King’s College London, London, WC2R 2LS UK
| | - K. J. de Vries
- />High Energy Physics Group, Blackett Laboratory, Imperial College, Prince Consort Road, London, SW7 2AZ UK
| | - G. Weiglein
- />DESY, Notkestraße 85, 22607 Hamburg, Germany
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Feng JL, Kant P, Profumo S, Sanford D. Three-loop corrections to the Higgs boson mass and implications for supersymmetry at the LHC. PHYSICAL REVIEW LETTERS 2013; 111:131802. [PMID: 24116767 DOI: 10.1103/physrevlett.111.131802] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Indexed: 06/02/2023]
Abstract
In supersymmetric models with minimal particle content and without left-right squark mixing, the conventional wisdom is that the 125.6 GeV Higgs boson mass implies top squark masses of O(10) TeV, far beyond the reach of colliders. This conclusion is subject to significant theoretical uncertainties, however, and we provide evidence that it may be far too pessimistic. We evaluate the Higgs boson mass, including the dominant three-loop terms at O(αtαs2), in currently viable models. For multi-TeV top squarks, the three-loop corrections can increase the Higgs boson mass by as much as 3 GeV and lower the required top-squark masses to 3-4 TeV, greatly improving prospects for supersymmetry discovery at the upcoming run of the LHC and its high-luminosity upgrade.
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Affiliation(s)
- Jonathan L Feng
- Department of Physics and Astronomy, University of California, Irvine, California 92697, USA
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13
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Baer H, Barger V, Huang P, Mickelson D, Mustafayev A, Sreethawong W, Tata X. Same-sign diboson signature from supersymmetry models with light Higgsinos at the LHC. PHYSICAL REVIEW LETTERS 2013; 110:151801. [PMID: 25167248 DOI: 10.1103/physrevlett.110.151801] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2013] [Indexed: 06/03/2023]
Abstract
In supersymmetric models with light Higgsinos (which are motivated by electroweak naturalness arguments), the direct production of Higgsino pairs may be difficult to search for at the LHC due to the low visible energy release from their decays. However, the wino pair production reaction W2(±)Z4→(W(±)Z1,2)+(W(±)W1(∓)) also occurs at substantial rates and leads to final states including equally opposite-sign and same-sign diboson production. We propose a novel search channel for LHC14 based on the same-sign diboson plus missing ET final state which contains only modest jet activity. Assuming gaugino mass unification, and an integrated luminosity ≳100 fb(-1), this search channel provides a reach for supersymmetry well beyond that from usual gluino pair production.
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Affiliation(s)
- Howard Baer
- Department of Physics and Astronomy, University of Oklahoma, Norman, Oklahoma 73019, USA
| | - Vernon Barger
- Department of Physics, University of Wisconsin, Madison, Wisconsin 53706, USA
| | - Peisi Huang
- Department of Physics, University of Wisconsin, Madison, Wisconsin 53706, USA
| | - Dan Mickelson
- Department of Physics and Astronomy, University of Oklahoma, Norman, Oklahoma 73019, USA
| | - Azar Mustafayev
- Department of Physics and Astronomy, University of Hawaii, Honolulu, Hawaii 96822, USA
| | - Warintorn Sreethawong
- School of Physics, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
| | - Xerxes Tata
- Department of Physics and Astronomy, University of Hawaii, Honolulu, Hawaii 96822, USA
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