Strong coupling constant and heavy quark masses in ( )-flavor QCD
Abstract
We present a determination of the strong coupling constant and heavy quark masses in (2+1)-flavor QCD using lattice calculations of the moments of the pseudo-scalar quarkonium correlators at several values of the heavy valence quark mass with Highly Improved Staggered Quark (HISQ) action. We determine the strong coupling constant in the $$\overline{MS}$$ scheme at four low-energy scales corresponding to mc, 1.5mc, 2mc, and 3mc, with mc being the charm quark mass. The novel feature of our analysis that up to eleven lattice spacings are used in the continuum extrapolations, with the smallest lattice spacing being 0.025 fm. We obtain Λ$$\frac{n_{f} =3}{MS}$$= 298 ± 16 MeV, which is equivalent to αs(μ = MZ, nf = 5) = 0.1159(12). For the charm and bottom quark masses in the $$\overline{MS}$$ scheme, we obtain: mc(μ = mc, nf = 4) = 1.265(10) GeV and mb(μ = mb, nf = 5) = 4.188(37) GeV.
- Authors:
- Publication Date:
- Research Org.:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- OSTI Identifier:
- 1559076
- Alternate Identifier(s):
- OSTI ID: 1566299
- Report Number(s):
- BNL-212119-2019-JAAM
Journal ID: ISSN 2470-0010; PRVDAQ; 034519
- Grant/Contract Number:
- SC0012704
- Resource Type:
- Published Article
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Name: Physical Review D Journal Volume: 100 Journal Issue: 3; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Petreczky, P., and Weber, J. H. Strong coupling constant and heavy quark masses in ( 2 + 1 )-flavor QCD. United States: N. p., 2019.
Web. doi:10.1103/PhysRevD.100.034519.
Petreczky, P., & Weber, J. H. Strong coupling constant and heavy quark masses in ( 2 + 1 )-flavor QCD. United States. https://doi.org/10.1103/PhysRevD.100.034519
Petreczky, P., and Weber, J. H. Tue .
"Strong coupling constant and heavy quark masses in ( 2 + 1 )-flavor QCD". United States. https://doi.org/10.1103/PhysRevD.100.034519.
@article{osti_1559076,
title = {Strong coupling constant and heavy quark masses in ( 2 + 1 )-flavor QCD},
author = {Petreczky, P. and Weber, J. H.},
abstractNote = {We present a determination of the strong coupling constant and heavy quark masses in (2+1)-flavor QCD using lattice calculations of the moments of the pseudo-scalar quarkonium correlators at several values of the heavy valence quark mass with Highly Improved Staggered Quark (HISQ) action. We determine the strong coupling constant in the $\overline{MS}$ scheme at four low-energy scales corresponding to mc, 1.5mc, 2mc, and 3mc, with mc being the charm quark mass. The novel feature of our analysis that up to eleven lattice spacings are used in the continuum extrapolations, with the smallest lattice spacing being 0.025 fm. We obtain Λ$\frac{n_{f} =3}{MS}$= 298 ± 16 MeV, which is equivalent to αs(μ = MZ, nf = 5) = 0.1159(12). For the charm and bottom quark masses in the $\overline{MS}$ scheme, we obtain: mc(μ = mc, nf = 4) = 1.265(10) GeV and mb(μ = mb, nf = 5) = 4.188(37) GeV.},
doi = {10.1103/PhysRevD.100.034519},
journal = {Physical Review D},
number = 3,
volume = 100,
place = {United States},
year = {Tue Aug 27 00:00:00 EDT 2019},
month = {Tue Aug 27 00:00:00 EDT 2019}
}
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https://doi.org/10.1103/PhysRevD.100.034519
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Cited by: 14 works
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Figures / Tables:
TABLE I: The lattice gauge couplings, the light quark masses, the lattice sizes, the inverse lattice spacings, the spatial lattice size in fm, the bare charm quark mass, and the bare bottom quark mass used in our calculations. The upper part of the table corresponds to the lattices from Ref.more »
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Figures / Tables found in this record:
Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.