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

Maezawa, Y.; Petreczky, P.

doi:10.1103/PhysRevD.94.034507

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).

View Accepted Manuscript (DOE)

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

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

Grant/Contract Number:: SC0012704

OSTI ID:: 1341636

Alternate ID(s):: OSTI ID: 1312056

Report Number(s):: BNL--113345-2016-JA; KB0301020

Journal Information:: Physical Review D, Journal Name: 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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Extended soft wall model with background related to features of QCD thermodynamics Zöllner, R.; Kämpfer, B. The European Physical Journal A, Vol. 53, Issue 6 https://doi.org/10.1140/epja/i2017-12328-0	journal	June 2017
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FLAG Review 2019 Aoki, S.; Aoki, Y.; Becirevic, D. Deutsches Elektronen-Synchrotron, DESY, Hamburg https://doi.org/10.3204/pubdb-2020-04064	text	January 2020
Determination of the QCD coupling from the static energy and the free energy Bazavov, Alexei; Brambilla, Nora; Tormo, Xavier Garcia i. arXiv https://doi.org/10.48550/arxiv.1907.11747	text	January 2019
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