期刊
PHYSICAL REVIEW D
卷 82, 期 7, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.82.074505
关键词
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资金
- IBM System Blue Gene Solution
- Hitachi at the High Energy Accelerator Research Organization (KEK) [SR11000, 07-16]
- Japanese Ministry of Education [18740167, 19540286, 19740121, 20105005, 20340047, 20105001, 20105002, 20105003, 20025010, 21105508, 21674002, 21684013]
- Grants-in-Aid for Scientific Research [20105002, 20025010, 21674002, 18740167, 21684013, 20340047, 21105508, 19740121, 19540286, 20105005] Funding Source: KAKEN
We determine the strong coupling constant alpha 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 (3)/MS. At the Z boson mass scale, we obtain alpha((5))(s) (MZ) = 0.1181(3)((+14)(-12) ), where the first error is statistical and the second is our estimate of various systematic uncertainties.
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