Pure gravity mediation with m3/2=10-100TeV

Physical review D: Particles and fields (Impact Factor: 4.86). 05/2012; 85(9):95011-. DOI: 10.1103/PhysRevD.85.095011
Source: arXiv

ABSTRACT Recently, the ATLAS and CMS collaborations reported exciting hints of a
standard model-like Higgs boson with a mass around 125 GeV. Such a Higgs
boson mass can be easily obtained in the minimal supersymmetric standard
model based on the “pure gravity mediation model” where the
sfermion masses and the Higgs mass parameters are in the tens to
hundreds TeV range, while the gauginos are in the hundreds GeV to TeV
range. In this paper, we discuss details of the gaugino mass spectrum in
the pure gravity mediation model. We also discuss the signals of the
model at current and future experiments such as cosmic-ray observations
and the LHC experiments. In particular, we show that the parameter space
which is consistent with the thermal leptogenesis can be fully surveyed
experimentally in the foreseeable future.

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    • "The several extensions of the MSSM are proposed; the additional vector-like matters [4], the specific mass spectrum (large A-term or Next-to-MSSM) [5], and the high-scale SUSY scenarios [6] [7] [8]. "
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    ABSTRACT: The electric dipole moments (EDMs) of electron and nucleons are the promising probe of the new physics. In the generic high-scale supersymmetric (SUSY) scenarios such as models based on mixture of the anomaly and gauge mediations, gluino has an additional contribution to the nucleon EDMs. In this paper, we estimated the effect of the CP-violating gluon Weinberg operator induced by the gluino chromoelectric dipole moment in the high-scale SUSY scenarios, and we evaluated the nucleon and electron EDMs in these scenarios. We found that in the generic high-scale SUSY models, the nucleon EDMs may receive the sizable contribution from the Weinberg operator. Thus, it is important to compare the nucleon EDMs with the electron EDM in order to discriminate among the high-scale SUSY models.
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    ABSTRACT: In this note, we advocate a new method for identifying gluino pair production events at the LHC. The method is motivated by and works for theories with heavy squarks and Wino-like LSPs (with nearly degenerate LSP and chargino). Such theories are well motivated and their gluinos typically have a O(50%) branching ratio to charged Winos. Observing the track of a long lived charged Wino produced from gluino decay could give a clear identification of a gluino event. Charged Wino NLSPs produced in colliders can be long-lived enough to leave a reconstructable high pT charged track before decaying into a soft pion (or a soft lepton) and the LSP, a signature with low SM background. By supplementing the canonical gluino search strategy with a search for these stiff chargino tracks, our results suggest it will be possible to find gluinos with significantly less luminosity. In addition, we describe a procedure for obtaining a kinematic measurement of the gluino mass using the three momenta of the reconstructed chargino tracks. With measurements of the gluino mass and cross section, it will be possible to determine the gluino spin, and confirm that the excess events are indeed due to a spin 1/2 superpartner. It may also be possible to use these stiff Wino tracks to obtain an approximate measurement of the chargino mass, and therefore the LSP (dark matter) mass.
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    ABSTRACT: The spontaneous breaking of B-L symmetry naturally accounts for the small observed neutrino masses via the seesaw mechanism. We have recently shown that the cosmological realization of B-L breaking in a supersymmetric theory can successfully generate the initial conditions of the hot early universe, i.e. entropy, baryon asymmetry and dark matter, if the gravitino is the lightest superparticle (LSP). This implies relations between neutrino and superparticle masses. Here we extend our analysis to the case of very heavy gravitinos which are motivated by hints for the Higgs boson at the LHC. We find that the nonthermal production of 'pure' wino or higgsino LSPs, i.e. weakly interacting massive particles (WIMPs), in heavy gravitino decays can account for the observed amount of dark matter while simultaneously fulfilling the constraints imposed by primordial nucleosynthesis and leptogenesis within a range of LSP, gravitino and neutrino masses. For instance, a mass of the lightest neutrino of 0.05 eV would require a higgsino mass below 900 GeV and a gravitino mass of at least 10 TeV.
    Physics Letters B 03/2012; 713(2). DOI:10.1016/j.physletb.2012.05.042 · 6.13 Impact Factor
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