Heavy-Light Meson Semileptonic Decays with Staggered Light Quarks
J. Shigemitsu, C.T.H. Davies, A. Gray, E. Gulez, G.P. Lepage, M., Wingate
TL;DR
This study explores heavy-light meson semileptonic decays using lattice QCD techniques, demonstrating effective handling of oscillatory correlator contributions and incorporating perturbative matching for improved accuracy.
Contribution
It introduces Bayesian fitting methods to manage oscillatory contributions in staggered quark correlators and applies one-loop perturbative matching in heavy-light decay calculations.
Findings
Successful handling of oscillatory contributions with Bayesian fits
Investigation of B meson decays to Goldstone and non-Goldstone pions
Implementation of perturbative matching for heavy-light currents
Abstract
We report on exploratory studies of heavy-light meson semileptonic decays using Asqtad light quarks, NRQCD heavy quarks and Symanzik improved glue on coarse quenched lattices. Oscillatory contributions to three-point correlators coming from the staggered light quarks are found to be handled well by Bayesian fitting methods. B meson decays to both the Goldstone pion and to one of the point-split non-Goldstone pions are investigated. One-loop perturbative matching of NRQCD/Asqtad heavy-light currents is incorporated.
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