Heavy --> Light semileptonic decays of pseudoscalar mesons from lattice QCD

TL;DR

This paper presents lattice QCD calculations of form factors for semileptonic decays of pseudoscalar mesons, specifically B to pi and D to K(pi), using non-perturbative improvement in the quenched approximation.

Contribution

It provides new lattice QCD results for semileptonic decay form factors with non-perturbative O(a) improvement, enhancing precision in theoretical predictions.

Findings

Form factors parameterized with few variables

Results applicable to B and D meson decays

Improved accuracy over previous lattice calculations

Abstract

We have computed the form factors for B --> pi and D --> K(pi) semileptonic decays on the lattice by using full non-perturbative O(a) improvement, in the quenched approximation. Our results are expressed in terms of few parameters which describe the q^2-dependence and normalization of the form factors.