24–28 Oct 2022
University of Santiago de Compostela
Europe/Madrid timezone

Lambda_c semileptonic decay including new physics

25 Oct 2022, 15:30
20m
Classroom 3, Facultad de Ciencias de la Comunicación (University of Santiago de Compostela)

Classroom 3, Facultad de Ciencias de la Comunicación

University of Santiago de Compostela

Campus Norte, Av. de Castelao, s/n, 15782 Santiago de Compostela, Spain
P6 Hadron Structure, Spectroscopy, and Dynamics P6 Hadron Structure, Spectroscopy, and Dynamics

Speaker

Fernando Alvarado

Description

We study deviations from the Standard Model in the Lambda_c to Lambda_s semileptonic decay, where lepton flavour universality violation could be observed. We consider generalised dimension-6 semileptonic c to s operators of scalar, pseudoscalar, vector, axial-vector and tensor types. We rely on lattice QCD for the hadronic transition form factors, employing heavy quark spin symmetry (HQSS) to estimate those that have not yet been determined on the lattice. Uncertainties due to the truncation of the new-physics Hamiltonian and different implementations of HQSS are carefully taken into account. As a result, we unravel the new-physics discovery potential of the Lambda_c semileptonic decay in different observables.

Primary authors

Fernando Alvarado Luis Alvarez-Ruso

Presentation materials