Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-06-23
Eur.Phys.J.C41:305-310,2005
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages, 2 figures, LaTeX2e. Minor typos corrected. References added and corrected. Introduction changed
Scientific paper
10.1140/epjc/s2005-02198-8
Constraints on the whole spectrum of lepton flavor violating vertices are shown in the context of the standard two Higgs doublet model. The vertex involving the $e-\tau $ mixing is much more constrained than the others, and the decays proportional to such vertex are usually very supressed. On the other hand, bounds on the quark sector are obtained from leptonic decays of the $B_{d,s}^{0}$ mesons and from $\Delta M_{B_{d}^{0}}$. We emphasize that although the $B_{d}^{0}-\bar{B}_{d}^{0}$ mixing restricts severely the $% d-b$ mixing vertex, the upper bound for this vertex could still give a sizeable contribution to the decay $B_{d}^{0}\to \mu \bar{\mu}$ respect to the standard model contribution, from which we see that such vertex could still play a role in the phenomenology.
Diaz Rodolfo A.
Martinez Rafael
Sandoval Carlos E.
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