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Title: Global analysis of the pMSSM in light of the Fermi GeV excess: prospects for the LHC Run-II and astroparticle experiments

Abstract

We present a new global fit of the 19-dimensional phenomenological Minimal Supersymmetric Standard Model (pMSSM-19) that complies with all the latest experimental results from dark matter indirect, direct and accelerator dark matter searches. We show that the model provides a satisfactory explanation of the excess of gamma rays from the Galactic centre observed by the Fermi Large Area Telescope, assuming that it is produced by the annihilation of neutralinos in the Milky Way halo. We identify two regions that pass all the constraints: the first corresponds to neutralinos with a mass ∼80−100 GeV annihilating into WW with a branching ratio of 95%; the second to heavier neutralinos, with mass ∼180−200 GeV annihilating into t-bart with a branching ratio of 87%. We show that neutralinos compatible with the Galactic centre GeV excess will soon be within the reach of LHC run-II — notably through searches for charginos and neutralinos, squarks and light smuons — and of Xenon1T, thanks to its unprecedented sensitivity to spin-dependent cross-section off neutrons.

Authors:
;  [1];  [2];  [3];  [4];  [5];  [6];  [7];  [1]
  1. GRAPPA, University of Amsterdam,Science Park 904, 1090 GL Amsterdam (Netherlands)
  2. IMAPP, Radboud University Nijmegen,P.O. Box 9010, NL-6500 GL Nijmegen (Netherlands)
  3. (Netherlands)
  4. Instituto de Física Corpuscular, IFIC-UV/CSIC, University of Valencia,Apartado 22085, E-46071 València (Spain)
  5. Instituto de Física Teórica UAM/CSIC, Universidad Autónoma de Madrid,Cantoblanco, E-28049, Madrid (Spain)
  6. Imperial Centre for Inference and Cosmology,Imperial College London, Blackett Laboratory,Prince Consort Road, London SW7 2AZ (United Kingdom)
  7. (United Kingdom)
Publication Date:
Sponsoring Org.:
SCOAP3, CERN, Geneva (Switzerland)
OSTI Identifier:
22572062
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2016; Journal Issue: 04; Other Information: PUBLISHER-ID: JCAP04(2016)037; OAI: oai:repo.scoap3.org:15261; cc-by Article funded by SCOAP3. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BRANCHING RATIO; CERN LHC; COSMIC PHOTONS; COSMOLOGY; CROSS SECTIONS; GAMMA RADIATION; GEV RANGE 100-1000; GLOBAL ANALYSIS; MANY-DIMENSIONAL CALCULATIONS; MILKY WAY; NEUTRALINOS; NONLUMINOUS MATTER; REST MASS; STANDARD MODEL; T QUARKS; TOPONIUM

Citation Formats

Bertone, Gianfranco, Calore, Francesca, Caron, Sascha, Nikhef,Science Park 105, 1098XG Amsterdam, Ruiz, Roberto, Kim, Jong Soo, Trotta, Roberto, Data Science Institute, William Penney Laboratory, Imperial College London,London SW7 2AZ, and Weniger, Christoph. Global analysis of the pMSSM in light of the Fermi GeV excess: prospects for the LHC Run-II and astroparticle experiments. United States: N. p., 2016. Web. doi:10.1088/1475-7516/2016/04/037.
Bertone, Gianfranco, Calore, Francesca, Caron, Sascha, Nikhef,Science Park 105, 1098XG Amsterdam, Ruiz, Roberto, Kim, Jong Soo, Trotta, Roberto, Data Science Institute, William Penney Laboratory, Imperial College London,London SW7 2AZ, & Weniger, Christoph. Global analysis of the pMSSM in light of the Fermi GeV excess: prospects for the LHC Run-II and astroparticle experiments. United States. doi:10.1088/1475-7516/2016/04/037.
Bertone, Gianfranco, Calore, Francesca, Caron, Sascha, Nikhef,Science Park 105, 1098XG Amsterdam, Ruiz, Roberto, Kim, Jong Soo, Trotta, Roberto, Data Science Institute, William Penney Laboratory, Imperial College London,London SW7 2AZ, and Weniger, Christoph. 2016. "Global analysis of the pMSSM in light of the Fermi GeV excess: prospects for the LHC Run-II and astroparticle experiments". United States. doi:10.1088/1475-7516/2016/04/037.
@article{osti_22572062,
title = {Global analysis of the pMSSM in light of the Fermi GeV excess: prospects for the LHC Run-II and astroparticle experiments},
author = {Bertone, Gianfranco and Calore, Francesca and Caron, Sascha and Nikhef,Science Park 105, 1098XG Amsterdam and Ruiz, Roberto and Kim, Jong Soo and Trotta, Roberto and Data Science Institute, William Penney Laboratory, Imperial College London,London SW7 2AZ and Weniger, Christoph},
abstractNote = {We present a new global fit of the 19-dimensional phenomenological Minimal Supersymmetric Standard Model (pMSSM-19) that complies with all the latest experimental results from dark matter indirect, direct and accelerator dark matter searches. We show that the model provides a satisfactory explanation of the excess of gamma rays from the Galactic centre observed by the Fermi Large Area Telescope, assuming that it is produced by the annihilation of neutralinos in the Milky Way halo. We identify two regions that pass all the constraints: the first corresponds to neutralinos with a mass ∼80−100 GeV annihilating into WW with a branching ratio of 95%; the second to heavier neutralinos, with mass ∼180−200 GeV annihilating into t-bart with a branching ratio of 87%. We show that neutralinos compatible with the Galactic centre GeV excess will soon be within the reach of LHC run-II — notably through searches for charginos and neutralinos, squarks and light smuons — and of Xenon1T, thanks to its unprecedented sensitivity to spin-dependent cross-section off neutrons.},
doi = {10.1088/1475-7516/2016/04/037},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 04,
volume = 2016,
place = {United States},
year = 2016,
month = 4
}
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