Master formula approach to broken chiral U(3)xU(3) symmetry
arXiv:0909.1606 · doi:10.1103/PhysRevD.81.076004
Abstract
The master formula approach to chiral symmetry breaking proposed by Yamagishi and Zahed is extended to the U_R(3)xU_L(3) group, in which effects of the U_A(1) anomaly and the flavor symmetry breaking m_u \not= m_d \not= m_s are properly contained. New identities for the gluon topological susceptibility and pi^0, eta, eta' -> gamma^(*) gamma^(*) decays are derived, which exactly embody the consequence from broken chiral symmetry in QCD without relying on any unphysical limit.
Version to appear in PRD, 25 pages
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