Title: Strong coupling constant from moments of quarkonium correlators revisited

Journal Article · · European Physical Journal. C, Particles and Fields
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We revisit previous determination of the strong coupling constant from moments of quarkonium correlators in (2 + 1)-flavor QCD. We use previously calculated moments obtained with Highly Improved Staggered Quark (HISQ) action for five different quark masses and several lattice spacings. We perform a careful continuum extrapolations of the moments and from the comparison of these to the perturbative result we determine the QCD Lambda parameter, $$\varLambda _{\overline{MS}}^{n_f=3}=332 \pm 17 \pm 2(scale)$$ MeV. This corresponds to $$\alpha _s^{n_f=5}(\mu =M_Z)=0.1177(12)$$.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
SC0012704
OSTI ID:
1841632
Report Number(s):
BNL-222751-2022-JAAM; BNL-222788-2022-JAAM; 64; PII: 9998
Journal Information:
European Physical Journal. C, Particles and Fields, Journal Name: European Physical Journal. C, Particles and Fields Journal Issue: 1 Vol. 82; ISSN 1434-6044
Publisher:
SpringerCopyright Statement
Country of Publication:
Germany
Language:
English

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