Lepton flavor violation in $τ$ decays

Details Lepton flavor violation in $τ$ decays Lepton flavor violation in $τ$ decays

2006-05-27

arxiv.org/abs/hep-ph/0605299v4

Phys.Rev.D74:035010,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 3 figures, typos corrected, references added, version to fit journal

Scientific paper

10.1103/PhysRevD.74.035010

We study the lepton flavor violation (LFV) in tau decays in the framework of the supersymmetric seesaw mechanism with nonholomorphic terms for the lepton sector at a large $\tan\beta$. In particular, we analyze two new decay modes $\tau\to \ell f_0(980)$ and $\tau\to \ell K^{+} K^{-}$ arising from the scalar boson exchanges contrast to $\tau\to \ell\eta^{(\prime)}$ from the pseudoscalar ones. We find that the decay branching ratios of the two new modes could be not only as large as the current upper limits of $O(10^{-7})$, but also larger than those of $\tau\to \ell \eta^{(\prime)}$. Experimental searches for the two modes are important for the LFV induced by the scalar-mediated mechanism. In addition, we show that the decay branching ratios of $\tau\to \ell \mu^{+} \mu^{-}$ are related to those of $\tau\to \ell \eta$ and $\tau\to \ell f_0(980)$.

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