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Title
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Likelihood analysis of the pMSSM11 in light of LHC 13-TeV data
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Author
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Abstract
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| We use MasterCode to perform a frequentist analysis of the constraints on a phenomenological MSSM model with 11 parameters, the pMSSM11, including constraints from similar to 36/fb of LHC data at 13 TeV and PICO, XENON1T and PandaX-II searches for dark matter scattering, as well as previous accelerator and astrophysical measurements, presenting fits both with and without the (g-2)(mu) constraint. The pMSSM11 is specified by the following parameters: 3 gaugino masses M-1,M-2,M-3, a common mass for the first-and second-generation squarks m((q) over tilde) and a distinct third-generation squark mass m((q) over tilde3), a common mass for the first-and second-generation sleptons m((l) over tilde) and a distinct third-generation slepton massm((tau) over tilde), a common trilinear mixing parameter A, the Higgs mixing parameter mu, the pseudoscalar Higgs mass M-A and tan beta. In the fit including (g - 2)(mu), a Bino-like. (chi) over tilde (0)(1) is preferred, whereas a Higgsino-like.(chi) over tilde (0)(1) is mildly favoured when the (g - 2)(mu) constraint is dropped. We identify the mechanisms that operate in different regions of the pMSSM11 parameter space to bring the relic density of the lightest neutralino,. (chi) over tilde (0)(1), into the range indicated by cosmological data. In the fit including (g - 2)(mu), coannihilations with. (chi) over tilde (0)(2) and theWino-like. (chi) over tilde (+/-)(1) or with nearly-degenerate first-and second-generation sleptons are active, whereas coanni-hilations with the. (chi) over tilde (0)(2) and the Higgsino-like. (chi) over tilde (+/-)(1) or with firstand second-generation squarks may be important when the (g - 2)(mu) constraint is dropped. In the two cases, we present chi(2) functions in two-dimensional mass planes as well as their one-dimensional profile projections and best-fit spectra. Prospects remain for discovering strongly-interacting sparticles at the LHC, in both the scenarios with and without the (g - 2)(mu) constraint, as well as for discovering electroweaklyinteracting sparticles at a future linear e(+)e(-) collider such as the ILC or CLIC. |
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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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Volume/pages
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78
:3
(2018)
, 38 p.
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Article Reference
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256
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ISI
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000428181000002
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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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