Journal
PHYSICAL REVIEW D
Volume 79, Issue 7, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.79.074510
Keywords
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Funding
- Japanese Ministry of Education [18034011, 18340075, 18740167, 19540286, 19740121, 19740160, 20025010, 20340047, 20740156]
- National Science Council of Taiwan [NSC96-2112-M-002-020-MY3, NSC96-2112M-001-017-MY3]
- Grants-in-Aid for Scientific Research [20340047, 20740156, 19540286, 19740121, 18740167, 18034011, 19740160, 21674002, 20025010, 18340075] Funding Source: KAKEN
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We calculate the vacuum polarization functions on the lattice using the overlap fermion formulation. By matching the lattice data at large momentum scales with the perturbative expansion supplemented by the operator product expansion (OPE), we extract the strong coupling constant alpha(s)(mu) in two-flavor QCD as Lambda((2))((MS)over bar)=0.234(9)((+16)(-0)) GeV, where the errors are statistical and systematic, respectively. In addition, from the analysis of the difference between the vector and axial-vector channels, we obtain some of the four-quark condensates.
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