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Lower limits on μ→eγ from new measurements on Ue3

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons30951

Rodejohann,  Werner
Werner Rodejohann - ERC Starting Grant, Junior Research Groups, MPI for Nuclear Physics, Max Planck Society;

Externe Ressourcen
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1204.1000v2.pdf
(Preprint), 262KB

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Zitation

Chakrabortty, J., Ghosh, P., & Rodejohann, W. (2012). Lower limits on μ→eγ from new measurements on Ue3. Physical Review D, 86(7): 075020, pp. 1-8. doi:10.1103/PhysRevD.86.075020.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000E-9590-A
Zusammenfassung
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. We also discuss processes like $\mu\to e\bar{e}e$ and $\mu\to e$ conversion in nuclei. Since these processes have sensitivity on the individual entries of $m_\nu$, their rates can still be vanishingly small.