Semileptonic τ decays: powerful probes of non-standard charged current weak interactions
Centro de Investigación y de Estudios Avanzados del IPN, Apdo. Postal 14-740, 07000 Ciudad de México, México.
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Published online: 17 June 2019
When looking for heavy (O(few TeV)) New Physics, the most eﬃcient way to bene?t from both high and low-energy measurements simultaneously is the use of the Standard Model Eﬀective Field Theory (SMEFT). In this talk I highlight the importance of semileptonic τ decays in complementing, in this respect, the traditional low-energy precision observables and high-energy measurements. This is yet another reason for considering hadronic tau decays as golden channels at Belle-II beyond the unquestionable interest of the CP violation anomaly in τ → KS πντ decays, that I also discuss within the eﬀective theory. A couple of new results for τ−→ K− ντ decays are also included.
© The Authors, published by EDP Sciences, 2019
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