Scalar meson mediated nuclear mu-e conversion

Abstract

We study the nuclear mu-e conversion in the general framework of the effective Lagrangian approach without referring to any specific realization of the physics beyond the standard model (SM) responsible for lepton flavor violation (LFV). We analyze the role of scalar meson exchange between the lepton and nucleon currents and show its relevance for the coherent channel of mu-e conversion. We show that this mechanism introduces modifications in the predicted mu-e conversion rates in comparison with the conventional direct nucleon mechanism, based on the contact type interactions of the nucleon currents with the LFV leptonic current. We derive from the experimental data lower limits on the mass scales of the generic LFV lepton-quark contact terms and demonstrate that they are more stringent than the similar limits existing in the literature.

14 pages, 1 figure

References in corpus (8)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• ππscattering
• Muon-electron conversion in strange quark sea
• Search for new physics at LHC
• Updated analysis of meson-nucleon sigma terms in the perturbative chiral quark model
• B-quark mediated neutrinoless ${\mu }^{-}-e^{-}$ conversion in presence of R-parity violation
• Vector mesons in nuclear mu-e conversion
• Effective Lagrangian approach to nuclear mu-e conversion and the role of vector mesons

Cited by in corpus (13)

• A facility to Search for Hidden Particles at the CERN SPS: the SHiP physics case
• Deep inelastic $e-\tau$ and $\mu -\tau$ conversion in the NA64 experiment at the CERN SPS
• New bounds on lepton flavor violating decays of vector mesons and the Z0 boson
• Implications of R-parity violating supersymmetry for atomic and hadronic EDMs
• Lepton flavor violating decays of vector mesons
• Hadronic electric dipole moments in R-parity violating supersymmetry
• Limits on Lepton Flavor Violation from μ-e-conversion
• Sensitivity potential to a light flavor-changing scalar boson with DUNE and NA64$\mu$
• Photoproduction and mixing effects of scalar a0 and f0 mesons
• Bounds on lepton flavor violating physics and decays of neutral mesons from $\tau (\mu )\to 3\ell ,\ell \gamma \gamma$-decays
• RGE effects on the LFV scale from meson decays
• Conversions of Bound Muons: Lepton Flavour Violation from Doubly Charged Scalars
• Decay of the Z' gauge boson with lepton flavor violation