Adler function and hadronic contribution to the muon g-2 in a nonlocal chiral quark model

Journal Article · Mon Nov 01 04:00:00 EST 2004 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.70.094011· OSTI ID:20705605

Dorokhov, Alexander E ^[1]

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1. Joint Institute for Nuclear Research, Bogoliubov Laboratory of Theoretical Physics, Dubna (Russian Federation)

The behavior of the vector Adler function at spacelike momenta is studied in the framework of a covariant chiral quark model with instantonlike 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 constituent quarks. The model reproduces the Adler function and V-A correlator extracted from the ALEPH and OPAL data on hadronic {tau} lepton decays, transformed into the Euclidean domain via dispersion relations. The leading order contribution from the hadronic part of the photon vacuum polarization to the anomalous magnetic moment of the muon, a{sub {mu}}{sup hvp(1)}, is estimated.

• OSTI ID: 20705605
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 70; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHARGED CURRENTS
CHIRAL SYMMETRY
CHIRALITY
DISPERSION RELATIONS
EUCLIDEAN SPACE
HADRONS
MAGNETIC MOMENTS
MUONS
NONLINEAR PROBLEMS
PHOTONS
QUANTUM ELECTRODYNAMICS
QUARK MODEL
QUARK-QUARK INTERACTIONS
QUARKS
TAU PARTICLES
V-A THEORY
VACUUM POLARIZATION
WEAK HADRONIC DECAY