Strong coupling constant from vacuum polarization functions in three-flavor lattice QCD with dynamical overlap fermions
Journal Article
·
· Physical Review. D, Particles, Fields, Gravitation and Cosmology
We determine the strong coupling constant {alpha}{sub s} from a lattice calculation of vacuum polarization functions (VPF) in three-flavor QCD with dynamical overlap fermions. Fitting lattice data of VPF to the continuum perturbative formula including the operator product expansion, we extract the QCD scale parameter {Lambda}{sub MS}{sup -(3)}. At the Z boson mass scale, we obtain {alpha}{sub s}{sup (5)}(M{sub z}) = 0.1181(3)(+14/-12), where the first error is statistical and the second is our estimate of various systematic uncertainties.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States). RIKEN Research Center
- Sponsoring Organization:
- DOE - Office Of Science
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 1001333
- Report Number(s):
- BNL-94475-2010-JA; ISSN 1550-2368; PRVDAQ; R&D Project: PO-3; TRN: US1100339
- Journal Information:
- Physical Review. D, Particles, Fields, Gravitation and Cosmology, Vol. 82, Issue 7; ISSN 1550-7998
- Country of Publication:
- United States
- Language:
- English
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