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22-28 July 2018
Kellogg Hotel and Conference Center
EST timezone

Precise determinations of quark masses

Jul 24, 2018, 10:45 AM
30m
Big Ten A (Kellogg Hotel and Conference Center)

Big Ten A

Kellogg Hotel and Conference Center

219 S Harrison Rd, East Lansing, MI 48824
Plenary Standard Model Parameters and Renormalization Plenary

Speaker

Dr Javad Komijani (University of Glasgow)

Description

We discuss the determination of quark masses using the MILC highly improved staggered-quark ensembles with four flavors of dynamical quarks. We extract quark masses from heavy-light pseudoscalar meson masses by making use of heavy quark effective theory (HQET) and continuum-QCD perturbative calculations. While heavy-light meson masses can be measured very precisely on lattice, perturbative calculations typically suffer from large truncation errors resulting in large uncertainties in final results. We present the MRS scheme, in which heavy quark masses are free from renormalon ambiguities and any renormalization scales, and we discuss how the use of the MRS scheme, as an intermediate scheme, improves the precision in our calculations. Combining our analysis with our separate determination of ratios of light-quark masses we present masses of the up, down, strange, charm, and bottom quarks. The method employed in this work also yields the matrix elements of some operators arising in HQET. Finally, we discuss and compare our results with other lattice determinations of quark masses.

Primary author

Dr Javad Komijani (University of Glasgow)

Presentation Materials