Indirect Bounds on Z-> mu e and Lepton Flavor Violation at Future Colliders

Details Indirect Bounds on Z-> mu e and Lepton Flavor Violation at Future Colliders Indirect Bounds on Z-> mu e and Lepton Flavor Violation at Future Colliders

2001-06-26

arxiv.org/abs/hep-ph/0106287v2

Phys.Lett. B522 (2001) 95-101

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, references added

Scientific paper

10.1016/S0370-2693(01)01254-0

Motivated by the interest in lepton number violating processes, we study the connection between the rate of Z -> mu e decay and those of the low-energy processes mu ->3 e, and mu -> e conversion in nuclear field. We show that if the vector or axial Z form factors are dominant, Br(Z->mu e) is not observable, while if the Z dipole form factors are dominant, the relatively weak indirect bound Br(Z->mu e)<7 10^{-9} does not fully preclude a signal at future colliders, as TESLA. We finally comment on the relation of Z->mu e with Z->tau e and Z->tau mu decays, and suggest a simple scaling law for these three processes.

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