Precision charm physics, m_c and alpha_s from lattice QCD
C. T. H. Davies, E. Gregory, I. Kendall, C. McNeile, G. P. Lepage, I., Allison, R. Woloshyn, E. Dalgic, H. Trottier, E. Follana, R. Horgan, K., Hornbostel, J. Shigemitsu
TL;DR
This paper reports precise lattice QCD calculations of charm quark mass and strong coupling constant, improving accuracy and addressing systematic errors in charm physics studies.
Contribution
It provides updated, high-precision determinations of m_c and alpha_s using advanced lattice QCD techniques and Bayesian methods for systematic error control.
Findings
Precise value of charm quark mass m_c
Updated determination of alpha_s from lattice QCD
Preliminary results on bottom quark mass
Abstract
We present an update of results from the HPQCD collaboration on charm physics using the Highly Improved Staggered Quark action. This includes a precise determination of m_c using moments of current-current correlators combined with high-order continuum QCD perturbation theory. We also include an update on the determination of alpha_s from lattice QCD, preliminary results on the determination of m_b and a summary plot of the status of the gold-plated meson spectrum. There is an appendix on tackling systematic errors in fitting using the Bayesian approach.
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Taxonomy
TopicsQuantum Chromodynamics and Particle Interactions · Particle physics theoretical and experimental studies · High-Energy Particle Collisions Research