Non-decoupling SUSY in LFV Higgs decays: a window to new physics at the LHC

• Published in: The journal of high energy physics 2013-09, Vol.2013 (9), p.1-27, Article 160
• Main Authors: Arana-Catania, M., Arganda, E., Herrero, M. J.
• Format: Article
• Language: English
• Subjects: Bosons; Channels; Classical and Quantum Gravitation; Constants; Decay; Decay rate; Decoupling; Elementary Particles; Flavor (particle physics); Higgs bosons; High energy physics; Large Hadron Collider; Leptons; Luminosity; Physics; Physics and Astronomy; Pushing; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Quarks; Relativity Theory; String Theory; Supersymmetry
• ISSN: 1029-8479; 1029-8479
• DOI: 10.1007/JHEP09(2013)160

A bstract The recent discovery of a SM-like Higgs boson at the LHC, with a mass around 125-126 GeV, together with the absence of results in the direct searches for supersymmetry, is pushing the SUSY scale ( m SUSY ) into the multi-TeV range. This discouraging situation from a low-energy SUSY point of view has its counterpart in indirect SUSY observables which present a non-decoupling behavior with m SUSY . This is the case of the one-loop lepton flavor violating Higgs decay rates induced by SUSY, which are shown here to remain constant as m SUSY grows, for large m SUSY > 2 TeV values and for all classes of intergenerational mixing in the slepton sector, LL , LR , RL and RR . In this work we focus on the LFV decays of the three neutral MSSM Higgs bosons h , H , A → τμ , considering the four types of slepton mixing , and show that all the three channels could be measurable at the LHC, being h → τμ the most promising one, with up to about hundred of events expected with the current LHC center-of-mass energy and luminosity. The most promising predictions for the future LHC stage are also included.