Quark masses and strong coupling constant in 2+1 flavor QCD

Maezawa, Y.; Petreczky, P.

doi:10.1103/PhysRevD.94.034507

Title: Quark masses and strong coupling constant in 2+1 flavor QCD

Journal Article · Tue Aug 30 00:00:00 EDT 2016 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.94.034507· OSTI ID:1341636

Maezawa, Y. ^[1]; Petreczky, P. ^[2]

Kyoto Univ. (Japan)
Brookhaven National Lab. (BNL), Upton, NY (United States)

We present a determination of the strange, charm and bottom quark masses as well as the strong coupling constant in 2+1 flavor lattice QCD simulations using highly improved staggered quark action. The ratios of the charm quark mass to the strange quark mass and the bottom quark mass to the charm quark mass are obtained from the meson masses calculated on the lattice and found to be mc/ms = 11.877(91) and mb/mc = 4.528(57) in the continuum limit. We also determine the strong coupling constant and the charm quark mass using the moments of pseudoscalar charmonium correlators: α_s(μ = m_c) = 0.3697(85) and mc(μ = mc) = 1.267(12) GeV. Our result for αs corresponds to the determination of the strong coupling constant at the lowest energy scale so far and is translated to the value α_s(μ = M_Z, n_f = 5) = 0.11622(84).

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Research Organization:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Under Secretary for Science (S-4); USDOE

Grant/Contract Number:: SC00112704; SC0012704

OSTI ID:: 1341636

Alternate ID(s):: OSTI ID: 1312056

Report Number(s):: BNL-113345-2016-JA; R&D Project: KB0301020; KB0301020; TRN: US1701680

Journal Information:: Physical Review D, Vol. 94; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 25 works

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