Lepton flavor violating decays of vector mesons

Details Lepton flavor violating decays of vector mesons Lepton flavor violating decays of vector mesons

2009-12-23

arxiv.org/abs/0912.4562v3

Phys.Rev.D81:037702,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

3 pages, 1 figure, accepted for publication in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.81.037702

We estimate the rates of lepton flavor violating decays of the vector mesons $\rho, \omega, \phi \to e \mu$. The theoretical tools are based on an effective Lagrangian approach without referring to any specific realization of the physics beyond the standard model responsible for lepton flavor violation (\Lfv). The effective lepton-vector meson couplings are extracted from the existing experimental bounds on the nuclear $\mu^--e^-$ conversion. In particular, we derive an upper limit for the \Lfv branching ratio ${\rm Br}(\phi \to e \mu) \leq1.3 \times 10^{-21}$ which is much more stringent than the recent experimental result ${\rm Br}(\phi \to e \mu) < 2 \times 10^{-6}$ presented by the SND Collaboration. Very tiny limits on \Lfv decays of vector mesons derived in this letter make direct experimental observation of these processes unrealistic.

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