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

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 o...

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Bibliographic Details
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
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Summary: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.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP09(2013)160