Lepton Flavor Violation without Supersymmetry

Details Lepton Flavor Violation without Supersymmetry Lepton Flavor Violation without Supersymmetry

2004-04-27

arxiv.org/abs/hep-ph/0404233v1

Phys.Rev. D70 (2004) 075007

Physics

High Energy Physics

High Energy Physics - Phenomenology

24 pages, 7 figures, 2 tables

Scientific paper

10.1103/PhysRevD.70.075007

We study the lepton flavor violating (LFV) processes mu -> e gamma, mu -> 3e, and mu -> e conversion in nuclei in the left-right symmetric model without supersymmetry and perform the first complete computation of the LFV branching ratios B(mu -> f) to leading non-trivial order in the ratio of left- and right-handed symmetry breaking scales. To this order, B(mu -> e gamma) and B(mu -> e) are governed by the same combination of LFV violating couplings, and their ratio is naturally of order unity. We also find B(mu -> 3 e)/B(mu -> e) \sim 100 under slightly stronger assumptions. Existing limits on the branching ratios already substantially constrain mass splittings and/or mixings in the heavy neutrino sector. When combined with future collider studies and precision electroweak measurements, improved limits on LFV processes will test the viability of low-scale, non-supersymmetric LFV scenarios.

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