Lower Limits on $μ\to e γ$ from new Measurements on $U_{e3}$

Details Lower Limits on $μ\to e γ$ from new Measurements on $U_{e3}$ Lower Limits on $μ\to e γ$ from new Measurements on $U_{e3}$

2012-04-04

arxiv.org/abs/1204.1000v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 7 .eps figures; April 2012

Scientific paper

New data on the lepton mixing angle $\theta_{13}$ imply that the $e\mu$ element of the matrix $m_\nu m_\nu^\dagger$, where $m_\nu$ is the neutrino Majorana mass matrix, cannot vanish. This implies a lower limit on lepton flavor violating processes in the $e\mu$ sector in a variety of frameworks, including Higgs triplet models or the concept of minimal flavor violation in the lepton sector. We illustrate this for the branching ratio of $\mu \to e \gamma$ in the type II seesaw mechanism, in which a Higgs triplet is responsible for neutrino mass and also mediates lepton flavor violation.

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