Vector and axial-vector correlators in a instanton-like quark modelстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The behavior of the vector Adler function at spacelike momenta is studied in the frame-
work of a covariant chiral quark model with instanton-like quark-quark interaction. This
function describes the transition between the high energy asymptotically free region of
almost massless current quarks to the low energy hadronized regime with massive con-
stituent quarks. The model reproduces the Adler function and V ����A correlator extracted
from the ALEPH and OPAL data on hadronic lepton decays, transformed into the
Euclidean domain via dispersion relations. The leading order contribution from hadronic
part of the photon vacuum polarization to the anomalous magnetic moment of the muon,
ahvp(1), is estimated.