The pMSSM10 after LHC run 1
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Author(s)
Type
Journal Article
Abstract
We present a frequentist analysis of the parameter space of the pMSSM10, in which the following ten soft SUSY-breaking parameters are specified independently at the mean scalar top mass scale MSUSY≡
√
m
˜
t
1m
˜
t
2
: the gaugino masses M1,2,3, the first-and second-generation squark masses m
˜
q
1=m
˜
q
2, the third-generation squark mass m
˜
q
3, a common slepton mass m
˜
ℓ
and a common trilinear mixing parameter A, as well as the Higgs mixing parameter μ, the pseudoscalar Higgs mass MA and tanβ, the ratio of the two Higgs vacuum expectation values. We use the MultiNest sampling algorithm with ∼1.2 ×109 points to sample the pMSSM10 parameter space. A dedicated study shows that the sensitivities to strongly interacting sparticle masses of ATLAS and CMS searches for jets, leptons + https://static-content.springer.com/image/art%3A10.1140%2Fepjc%2Fs10052-015-3599-y/MediaObjects/10052_2015_3599_IEq12_HTML.gif signals depend only weakly on many of the other pMSSM10 parameters. With the aid of the Atom and Scorpion codes, we also implement the LHC searches for electroweakly interacting sparticles and light stops, so as to confront the pMSSM10 parameter space with all relevant SUSY searches. In addition, our analysis includes Higgs mass and rate measurements using the HiggsSignals code, SUSY Higgs exclusion bounds, the measurements of BR(Bs→μ+μ−) by LHCb and CMS, other B-physics observables, electroweak precision observables, the cold dark matter density and the XENON100 and LUX searches for spin-independent dark matter scattering, assuming that the cold dark matter is mainly provided by the lightest neutralino
˜
χ
0
1
. We show that the pMSSM10 is able to provide a supersymmetric interpretation of (g−2)μ, unlike the CMSSM, NUHM1 and NUHM2. As a result, we find (omitting Higgs rates) that the minimum χ2=20.5 with 18 degrees of freedom (d.o.f.) in the pMSSM10, corresponding to a χ2 probability of 30.8 %, to be compared with χ2/d.o.f.=32.8/24 (31.1/23) (30.3/22) in the CMSSM (NUHM1) (NUHM2). We display the one-dimensional likelihood functions for sparticle masses, and we show that they may be significantly lighter in the pMSSM10 than in the other models, e.g., the gluino may be as light as ∼1250 GeV at the 68 % CL, and squarks, stops, electroweak gauginos and sleptons may be much lighter than in the CMSSM, NUHM1 and NUHM2. We discuss the discovery potential of future LHC runs, e+e− colliders and direct detection experiments.
√
m
˜
t
1m
˜
t
2
: the gaugino masses M1,2,3, the first-and second-generation squark masses m
˜
q
1=m
˜
q
2, the third-generation squark mass m
˜
q
3, a common slepton mass m
˜
ℓ
and a common trilinear mixing parameter A, as well as the Higgs mixing parameter μ, the pseudoscalar Higgs mass MA and tanβ, the ratio of the two Higgs vacuum expectation values. We use the MultiNest sampling algorithm with ∼1.2 ×109 points to sample the pMSSM10 parameter space. A dedicated study shows that the sensitivities to strongly interacting sparticle masses of ATLAS and CMS searches for jets, leptons + https://static-content.springer.com/image/art%3A10.1140%2Fepjc%2Fs10052-015-3599-y/MediaObjects/10052_2015_3599_IEq12_HTML.gif signals depend only weakly on many of the other pMSSM10 parameters. With the aid of the Atom and Scorpion codes, we also implement the LHC searches for electroweakly interacting sparticles and light stops, so as to confront the pMSSM10 parameter space with all relevant SUSY searches. In addition, our analysis includes Higgs mass and rate measurements using the HiggsSignals code, SUSY Higgs exclusion bounds, the measurements of BR(Bs→μ+μ−) by LHCb and CMS, other B-physics observables, electroweak precision observables, the cold dark matter density and the XENON100 and LUX searches for spin-independent dark matter scattering, assuming that the cold dark matter is mainly provided by the lightest neutralino
˜
χ
0
1
. We show that the pMSSM10 is able to provide a supersymmetric interpretation of (g−2)μ, unlike the CMSSM, NUHM1 and NUHM2. As a result, we find (omitting Higgs rates) that the minimum χ2=20.5 with 18 degrees of freedom (d.o.f.) in the pMSSM10, corresponding to a χ2 probability of 30.8 %, to be compared with χ2/d.o.f.=32.8/24 (31.1/23) (30.3/22) in the CMSSM (NUHM1) (NUHM2). We display the one-dimensional likelihood functions for sparticle masses, and we show that they may be significantly lighter in the pMSSM10 than in the other models, e.g., the gluino may be as light as ∼1250 GeV at the 68 % CL, and squarks, stops, electroweak gauginos and sleptons may be much lighter than in the CMSSM, NUHM1 and NUHM2. We discuss the discovery potential of future LHC runs, e+e− colliders and direct detection experiments.
Date Issued
2015-09-15
Date Acceptance
2015-08-04
Citation
European Physical Journal C, 2015, 75
ISSN
1434-6052
Publisher
Springer Verlag
Journal / Book Title
European Physical Journal C
Volume
75
Copyright Statement
© The Author(s) 2015. 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.
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Subjects
Science & Technology
Physical Sciences
Physics, Particles & Fields
Physics
SUPERSYMMETRIC DARK-MATTER
NONUNIVERSAL HIGGS MASSES
LARGE TAN-BETA
RELIC DENSITY
PP COLLISIONS
MUON G-2
MINIMAL SUPERGRAVITY
PARTICLE PHYSICS
EXCLUSION BOUNDS
PARAMETER SPACE
Nuclear & Particles Physics
0206 Quantum Physics
0202 Atomic, Molecular, Nuclear, Particle And Plasma Physics
Publication Status
Published
Article Number
422