Programme

O.17 -- Oral, VCTP-49

Date: Friday, 2 August 2024

Time: 17:30 - 17:55

Semileptonic decays $B_s \to D_s^{(*)}\tau\nu$ as probe for new physics

Chien-Thang Tran (1), Mikhail A. Ivanov (2), Pietro Santorelli (3,4), Quoc-Phong Vo (5)

(1) Ho Chi Minh City University of Technology and Education; (2) Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, Russia; (3) University of Naples Federico II, Italy; (4) INFN Naples, Italy; (5) University of Science, Ho Chi Minh City.

We study the semileptonic decays $B_s \to D_s^{(*)}\tau\nu$ as a promising probe for new physics (NP) beyond the standard model (SM). The extension of the SM is done through the introduction of four-fermion operators beyond the $V-A$ structure with the corresponding Wilson coefficients characterizing their contribution. The constraints on these coefficients are obtained from recent experimental data. Form factors describing hadron transitions are calculated in our covariant quark model with infrared confinement. Theoretical predictions for the full set of observables in these chanels are provided. We compare our results with other studies and analyze possible NP effects to be tested in future experiments.

Presenter: Tran Chien-Thang