Lepton flavor violating decays of vector mesons

Abstract

We estimate the rates of lepton flavor violating decays of the vector mesons $\rho ,\omega ,\varphi \to e\mu$. 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 $\mathrm{Br}(\varphi \to e\mu )\le 1.3\times 10^{-21}$ which is much more stringent than the recent experimental result $\mathrm{Br}(\varphi \to e\mu )<2\times 10^{-6}$ 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.

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

References in corpus (5)

• Muon-electron conversion in strange quark sea
• B-quark mediated neutrinoless ${\mu }^{-}-e^{-}$ conversion in presence of R-parity violation
• Scalar meson mediated nuclear mu-e conversion
• Effective Lagrangian approach to nuclear mu-e conversion and the role of vector mesons
• Vector mesons in nuclear mu-e conversion

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• Left-Right Symmetric Models at the High-Intensity Frontier
• Indirect constraints on lepton-flavour-violating quarkonium decays
• Search for lepton flavor violation in supersymmetric models via meson decays
• Limits on Lepton Flavor Violation from μ-e-conversion
• New gauge boson Z' and lepton flavor violating decays and production of vector mesons
• Lepton flavor violation decays of vector mesons in unparticle physics
• Sensitivity potential to a light flavor-changing scalar boson with DUNE and NA64$\mu$
• Bounds on lepton flavor violating physics and decays of neutral mesons from $\tau (\mu )\to 3\ell ,\ell \gamma \gamma$-decays
• Search for charged lepton flavor violation of vector mesons in BLMSSM model
• The lepton flavor violating decays of vector mesons in the MRSSM