Journal
PHYSICS LETTERS B
Volume 511, Issue 2-4, Pages 203-208Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0370-2693(01)00657-8
Keywords
lepton flavor violation; exotic mu-e conversion in nuclei; muon capture; physics beyond the standard model; strange quark sea
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We study nuclear mu (-)-e(-) conversion in the general framework of effective Lagrangian approach without referring to any specific realization of the physics beyond the standard model (SM) responsible for lepton flavor violation (L-f) All the possible types of short range interactions (non-photonic mechanisms), i.e., (pseudo-)scalar, (axial-)vector and tenser, are included in our formalism. We show that the mu (-)-e(-) conversion in the strange nucleon sea via the scalar interactions is comparable with that in the valence quarks, This provides an insight into the strange quark couplings beyond the SM. From the available experimental data on mu (-)-e(-) conversion and expected sensitivities of planned experiments we derived upper bounds on the generic L-f-parameters of mu (-)-e(-) conversion sensitive to the relevant u-, d- and s-quark couplings. (C) 2001 Elsevier Science B.V. All rights reserved.
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