期刊
PHYSICS LETTERS B
卷 593, 期 -, 页码 296-301出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2004.04.076
关键词
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The topological susceptibility and the higher moments of the topological charge distribution in QCD are expressed through certain n-point functions of the scalar and pseudo-scalar quark densities at vanishing momenta, which are free of short-distance singularities. Since the normalization of the correlation functions is determined by the non-singlet chiral Ward identities, these formulae provide an unambiguous regularization-independent definition of the moments and thus of the charge distribution. (C) 2004 Elsevier B.V. All rights reserved.
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