Published April 2015 | Version v1
Report Open

The pMSSM10 after LHC Run 1

  • 1. Imperial College, London (United Kingdom). High Energy Physics Group
  • 2. DESY, Hamburg (Germany)

Description

We present a frequentist analysis of the parameter space of the pMSSM10, in which the following 10 soft SUSY-breaking parameters are specified independently at the mean scalar top mass scale MSUSY≡√(mt1mt2): the gaugino masses M1,2,3, the 1st-and 2nd-generation squark masses mq1=mq2, the third-generation squark mass mq3, a common slepton mass Ml and a common trilinear mixing parameter A, the Higgs mixing parameter μ, the pseudoscalar Higgs mass MA and tan β. We use the MultiNest sampling algorithm with ∝1.2 x 109 points to sample the pMSSM10 parameter space. A dedicated study shows that the sensitivities to strongly-interacting SUSY masses of ATLAS and CMS searches for jets, leptons+ET 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 EW-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 B-physics observables, EW precision observables, the CDM density and searches for spin-independent DM scattering. We show that the pMSSM10 is able to provide a SUSY interpretation of (g-2)μ, unlike the CMSSM, NUHM1 and NUHM2. As a result, we find (omitting Higgs rates) that the minimum χ2/d.o.f.=20.5/18 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 1-dimensional likelihood functions for SUSY masses, and show that they may be significantly lighter in the pMSSM10 than in the CMSSM, NUHM1 and NUHM2. We discuss the discovery potential of future LHC runs, e+e- colliders and direct detection experiments.

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Additional details

Publishing Information

Imprint Pagination
48 p.
ISSN
0418-9833
Report number
DESY--15-046