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Stau with Large Mass Difference and Enhancement of the Higgs to Diphoton Decay Rate in the MSSM

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arxiv 1303.0461 v2 pith:VDVDZCZ2 submitted 2013-03-03 hep-ph

Teppei Kitahara , Takahiro Yoshinaga This is my paper · ORCID
classification hep-ph
keywords largemassdecaydifferencediphotonhiggsstaustaus
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The ATLAS and the CMS collaborations have presented results which show an excess of the Higgs to diphoton decay channel. In the Minimal Supersymmetric Standard Model (MSSM), this situation can be achieved by a light stau and a large left-right mixing of the staus. However, this parameter region is severely constrained by vacuum stability. In order to relax the vacuum meta-stability condition, we focus on the parameter region where the mass difference between the two staus is large. This region has not been considered yet. In this paper, we show that staus with a large mass difference can relax the vacuum meta-stability condition sufficiently even if the lighter stau mass is kept light. We find that when the mass difference of two staus is large, the enhancement of the Higgs to diphoton decay rate becomes small in spite of a relaxation of the vacuum meta-stability condition. Because of this feature, an O(70)% enhancement of the Higgs to diphoton decay rate is difficult to achieve in the light stau scenario in the MSSM.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Non-holomorphic Contributions in GMSB with Adjoint Messengers

    hep-ph 2025-07 conditional novelty 6.0 of 10

    Including non-holomorphic soft terms in the RGE running of GMSB with adjoint messengers enlarges the allowed parameter space, keeps the stau non-tachyonic at small hypercharge messenger coupling, and can reduce SUSY c...

  2. On the coverage of neutralino dark matter in coannihilations at the upgraded LHC

    hep-ph 2019-08 conditional novelty 4.0 of 10

    Projected HE-LHC searches could rule out neutralino dark matter up to 2.6, 1.7, and 0.8 TeV in gluino, stop, and wino coannihilation scenarios, but not in stau coannihilation.

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