7–10 Apr 2015
Portoroz, Slovenia
Europe/Ljubljana timezone

Flavor violation in tau decays

10 Apr 2015, 09:46
23m
James Cook (Portoroz, Slovenia)

James Cook

Portoroz, Slovenia

Hotel Slovenija, Obala 33, 6320 Portoroz, Slovenia
Planary Talk Flavour

Speaker

Alexey Petrov (Wayne State University)

Description

Lepton flavor-violating processes offer interesting possibilities to probe new physics at multi-TeV scale. We discuss those in the framework of effective field theory, emphasizing the role of gluonic operators. Those operators are obtained by integrating out heavy quarks that are kinematically inaccessible at the scale where low-energy experiments take place and make those experiments sensitive to the couplings of lepton flavor changing neutral currents to heavy quarks. We discuss constraints on the Wilson coefficients of those operators from the muon conversion $\mu^- + (A,Z) \to e^- + (A,Z)$ and from lepton flavor-violating tau decays with one or two hadrons in the final state, e.g. $\tau \to \ell \ \eta^{(\prime)}$ and $\tau \to \ell \ \pi^+\pi^-$ with $\ell = \mu, e$. To illustrate the results we discuss explicit examples of constraining parameters of leptoquark models.

Author

Alexey Petrov (Wayne State University)

Presentation materials