Likelihood analysis of the pMSSM11 in light of LHC 13-TeV data

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Title: Likelihood analysis of the pMSSM11 in light of LHC 13-TeV data
Author(s): Bagnaschi, E
Sakurai, K
Borsato, M
Buchmueller, O
Citron, M
Costa, JC
De Roeck, A
Dolan, MJ
Ellis, JR
Flacher, H
Heinemeyer, S
Lucio, M
Martinez Santos, D
Olive, KA
Richards, A
Spanos, VC
Suarez Fernandez, I
Weiglein, G
Item Type: Journal Article
Abstract: We use MasterCode to perform a frequentist analysis of the constraints on a phenomenological MSSM model with 11 parameters, the pMSSM11, including constraints from ∼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)μ constraint. The pMSSM11 is specified by the following parameters: 3 gaugino masses M1,2,3 , a common mass for the first-and second-generation squarks mq~ and a distinct third-generation squark mass mq~3 , a common mass for the first-and second-generation sleptons mℓ~ and a distinct third-generation slepton mass mτ~ , a common trilinear mixing parameter A, the Higgs mixing parameter μ , the pseudoscalar Higgs mass MA and tanβ . In the fit including (g−2)μ , a Bino-like χ~01 is preferred, whereas a Higgsino-like χ~01 is mildly favoured when the (g−2)μ 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, χ~01 , into the range indicated by cosmological data. In the fit including (g−2)μ , coannihilations with χ~02 and the Wino-like χ~±1 or with nearly-degenerate first- and second-generation sleptons are active, whereas coannihilations with the χ~02 and the Higgsino-like χ~±1 or with first- and second-generation squarks may be important when the (g−2)μ constraint is dropped. In the two cases, we present χ2 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)μ constraint, as well as for discovering electroweakly-interacting sparticles at a future linear e+e− collider such as the ILC or CLIC.
Publication Date: 24-Mar-2018
Date of Acceptance: 3-Mar-2018
URI: http://hdl.handle.net/10044/1/58795
DOI: https://dx.doi.org/10.1140/epjc/s10052-018-5697-0
ISSN: 1434-6044
Publisher: Springer Verlag (Germany)
Journal / Book Title: European Physical Journal C: Particles and Fields
Volume: 78
Issue: 3
Copyright Statement: © The Author(s) 2018. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Funded by SCOAP3.
Keywords: Science & Technology
Physical Sciences
Physics, Particles & Fields
Physics
SUPERSYMMETRIC DARK-MATTER
EFFECTIVE-FIELD THEORY
EVEN HIGGS BOSONS
RUN 1
MSSM
PROGRAM
MUON
PREDICTION
PHYSICS
MASSES
Science & Technology
Physical Sciences
Physics, Particles & Fields
Physics
SUPERSYMMETRIC DARK-MATTER
EFFECTIVE-FIELD THEORY
EVEN HIGGS BOSONS
RUN 1
MSSM
PROGRAM
MUON
PREDICTION
PHYSICS
MASSES
0206 Quantum Physics
0202 Atomic, Molecular, Nuclear, Particle And Plasma Physics
Nuclear & Particles Physics
Publication Status: Published
Article Number: ARTN 256
Online Publication Date: 2018-03-24
Appears in Collections:Physics
High Energy Physics
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