Pseudoscalar meson $P\to \tau (\to \pi {\nu }_{\tau },\rho {\nu }_{\tau },\ell {\bar{\nu }}_{\ell }{\nu }_{\tau }){\bar{\nu }}_{\tau }$ decays in the Standard Model and beyond

Quan-Yi Hu

In this work, we have conducted a comprehensive and systematic theoretical investigation of the full cascade decays of charged pseudoscalar mesons, specifically $D_s$, $D$, $B$, an…