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

Abstract

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).

Authors:
 [1];  [2]
  1. Kyoto Univ. (Japan)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Under Secretary for Science (S-4)
OSTI Identifier:
1341636
Report Number(s):
BNL-113345-2016-JA
Journal ID: ISSN 2470-0010; R&D Project: KB0301020; KB0301020; TRN: US1701680
Grant/Contract Number:
SC00112704; SC0012704
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 94; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Maezawa, Y., and Petreczky, P. Quark masses and strong coupling constant in 2+1 flavor QCD. United States: N. p., 2016. Web. doi:10.1103/PhysRevD.94.034507.
Maezawa, Y., & Petreczky, P. Quark masses and strong coupling constant in 2+1 flavor QCD. United States. doi:10.1103/PhysRevD.94.034507.
Maezawa, Y., and Petreczky, P. 2016. "Quark masses and strong coupling constant in 2+1 flavor QCD". United States. doi:10.1103/PhysRevD.94.034507. https://www.osti.gov/servlets/purl/1341636.
@article{osti_1341636,
title = {Quark masses and strong coupling constant in 2+1 flavor QCD},
author = {Maezawa, Y. and Petreczky, P.},
abstractNote = {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: αs(μ = mc) = 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 αs(μ = MZ, nf = 5) = 0.11622(84).},
doi = {10.1103/PhysRevD.94.034507},
journal = {Physical Review D},
number = ,
volume = 94,
place = {United States},
year = 2016,
month = 8
}

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