The pMSSM10 after LHC run 1

The European physical journal. C, Particles and fields(2015)

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摘要
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 M_SUSY≡√(m_t̃_1 m_t̃_2) : the gaugino masses M_1,2,3 , the first-and second-generation squark masses m_q̃_1= m_q̃_2 , the third-generation squark mass m_q̃_3 , a common slepton mass m_ℓ̃ and a common trilinear mixing parameter A , as well as the Higgs mixing parameter μ , the pseudoscalar Higgs mass M_A and tanβ , the ratio of the two Higgs vacuum expectation values. We use the MultiNest sampling algorithm with ∼ 1.2 × 10^9 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 + 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(B_s →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 χ̃^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 χ ^2 = 20.5 with 18 degrees of freedom (d.o.f.) in the pMSSM10, corresponding to a χ ^2 probability of 30.8
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particles,fields
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