Rare B decays with moving NRQCD and improved staggered quarks

TL;DR

This paper presents a novel lattice QCD approach using moving-NRQCD and improved staggered quarks to compute form factors for rare B decays, enabling higher recoil momentum calculations.

Contribution

It introduces the application of moving-NRQCD combined with improved staggered quarks for more accurate form factor calculations in rare B decays.

Findings

Initial matrix element results obtained.

Operator matching coefficients calculated.

Discussion of challenges and potential improvements.

Abstract

We calculate form factors relevant for rare B decays using moving-NRQCD for the b quark and the AsqTad action for the light quarks. Moving NRQCD allows us to work directly with the physical b quark mass and go to higher recoil momentum compared to standard NRQCD. Here, we show first results for the matrix elements and the operator matching coefficients. Some difficulties and possible ways of improvement are discussed.