Lattice QCD Study of $B$-meson Decay Constants from ETMC
A. Bussone, N. Carrasco, P. Dimopoulos, R. Frezzotti, V. Gim\'enez, G., Herdo\'iza, P. Lami, V. Lubicz, C. Michael, E. Picca, L. Riggio, G.C. Rossi,, F. Sanfilippo, A. Shindler, S. Simula, C. Tarantino
TL;DR
This paper presents a lattice QCD calculation of B-meson decay constants using a ratio method that combines charm-quark simulations with a static limit, addressing systematic effects and comparing different flavor simulations.
Contribution
It introduces a ratio method for computing B-meson decay constants that effectively reaches the bottom quark sector and assesses systematic uncertainties.
Findings
Consistent results between two and four flavor simulations.
Effective ratio method for bottom quark sector.
Quantitative estimates of systematic effects.
Abstract
We discuss a lattice QCD computation of the -meson decay constants by the ETM collaboration where suitable ratios allow to reach the bottom quark sector by combining simulations around the charm-quark mass with an exactly known static limit. The different steps involved in this ratio method are discussed together with an account of the assessment of various systematic effects. A comparison of results from simulations with two and four flavour dynamical quarks is presented.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions · High-Energy Particle Collisions Research