Staggered Chiral Perturbation Theory with Heavy-Light Mesons

TL;DR

This paper develops a theoretical framework combining heavy quark effective theory with staggered chiral perturbation theory to compute properties of heavy-light mesons, providing next-to-leading order results for decay constants and form factors.

Contribution

It introduces a novel merging of two effective theories to analyze heavy-light mesons, enabling more precise calculations of decay constants and form factors.

Findings

Calculated B and D meson decay constants at NLO

Derived form factors for B(D) to pi(K) transitions

Applicable to both quenched and full QCD scenarios

Abstract

We merge heavy quark effective theory with staggered chiral perturbation theory to calculate heavy-light (B, D) meson quantities. We present results at NLO for the $B(D)$ meson decay constant in the partially quenched and full QCD cases, and discuss the calculation of the form factors for $B(D) \to \pi(K) \ell \nu$ decays.