Search for lepton flavor violation process e+e-→eμ in the energy region s=984-1060MeV and ϕ→eμ decay

Novosibirsk State University, Novo-Nikolaevsk, Novosibirsk, Russia
Physical Review D (Impact Factor: 4.64). 03/2010; 81(5):57102-. DOI: 10.1103/PhysRevD.81.057102
Source: arXiv


A search for lepton-flavor-violating process
e+e-→eμ in the energy region
s=984-1060MeV with the SND detector at the VEPP-2M
e+e- collider is reported. The model independent
90% C.L. upper limits on the e+e-→eμ cross
section, σeμ<8pb, as well as on the corresponding
ϕ→eμ branching fraction,
B(ϕ→eμ)<2×10-6 have been obtained, for
the polar angles 55°<θ<125° of the final particles.

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Available from: T. V. Dimova, Oct 04, 2015
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    ABSTRACT: In the minimal supersymmetric extension of the Standard Model (MSSM) the interactions between the SUSY particles and the Standard Model (SM) particles can contribute to the lepton flavor violation (LFV) decays of vector mesons at loop level. Taking the constraint on the lightest Higgs mass around 126 GeV, we study these decays by a scan over the parameter space which gives the predictions on μ-e conversion and τ→μγ satisfying the experimental bounds. The branching ratios of the vector mesons decays into eμ are strongly suppressed. However, the branching ratios of the heavy flavor mesons decays into τμ can reach the experimental sensitivity in near future. Therefore, the experimental signals of these decays may serve as a probe of the MSSM.
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