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Title
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Likelihood analysis of the sub-GUT MSSM in light of LHC 13-TeV data
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Author
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Abstract
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| We describe a likelihood analysis using MasterCode of variants of the MSSM in which the soft supersymmetry-breaking parameters are assumed to have universal values at some scale M-in below the supersymmetric grand unification scale M-GUT, as can occur in mirage mediation and other models. In addition to Min, such 'sub-GUT' models have the 4 parameters of the CMSSM, namely a common gaugino mass m(1/2), a common soft supersymmetry-breaking scalar mass m(0), a common trilinear mixing parameter A and the ratio of MSSM Higgs vevs tan beta, assuming that the Higgs mixing parameter mu > 0. We take into account constraints on strongly- and electroweakly-interacting spar tidies from similar to 36/fb of LHC data at 13 TeV and the LUX and 2017 PICO, XENONIT and PandaX-II searches for dark matter scattering, in addition to the previous LHC and dark matter constraints as well as full sets of flavour and electroweak constraints. We find a preference for M-in similar to 10(5) to 10(9) GeV, with M-in similar to M-GUT disfavoured by Delta chi(2) similar to 3 due to the BR(B-s,B-d -> mu(+)mu(-)) constraint. The lower limits on strongly-interacting sparticles are largely determined by LHC searches, and similar to those in the CMSSM, We find a preference for the LSP to be a Bino or Higgsino with m(chi 1)(-0) similar to TeV, with annihilation via heavy Higgs bosons H/A and stop coannihilation, or chargino coannitulation, bringing the cold dark matter density into the cosmological range. We find that spin-independent dark matter scattering is likely to be within reach of the planned LUX-Zeplin and XENONnT experiments. We probe the impact of the (g - 2)(mu), constraint, finding similar results whether or not it is included. |
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Language
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English
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Source (journal)
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European physical journal : C : particles and fields. - Berlin
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Publication
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Berlin
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2018
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ISSN
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1434-6044
1434-6052
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DOI
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10.1140/EPJC/S10052-018-5633-3
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Volume/pages
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78
:2
(2018)
, 22 p.
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Article Reference
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158
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ISI
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000426484200001
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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