Hard Exclusive Electroproduction of Pseudoscalar Mesons and QCD axial anomaly

Details Hard Exclusive Electroproduction of Pseudoscalar Mesons and QCD axial anomaly Hard Exclusive Electroproduction of Pseudoscalar Mesons and QCD axial anomaly

1998-09-04

arxiv.org/abs/hep-ph/9809277v4

Phys.Rev. D59 (1999) 114025

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 2 figures, RevTeX. Discussion of the factorization is expanded, discussion of the two-photon production of the pseud

Scientific paper

10.1103/PhysRevD.59.114025

The hard exclusive electroproduction of $\pi^0,\eta,\eta'$ mesons by the longitudinal photons is considered. We calculate the ratios of the $\pi^0 : \eta : \eta'$ yields for the electroproduction processes off nucleons and deuterons based on the QCD factorization theorem, the low energy QCD chiral dynamics, and the QCD anomaly. Thus investigation of these ratios gives a new way to probe the physics of the spontaneous chiral symmetry breaking.

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