Axial-vector currents and tau mesonic decays

Details Axial-vector currents and tau mesonic decays Axial-vector currents and tau mesonic decays

1996-10-22

arxiv.org/abs/hep-ph/9610444v1

Nucl.Phys.Proc.Suppl. 55C (1997) 205-212

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, talk presented at the Fourth International Workshop on tau Lepton Physivs, Este Park, Colorado, Sept. 15-19, 1996

Scientific paper

A general expression of the axial-vector current is presented, in which both the effects of the chiral symmetry breaking and the spontaneous chiral symmetry breaking are included. A new resonance formula of the axial-vector meson is derived and in the limit of $q^{2}\rightarrow 0$ this formula doesn't go back to the ``chiral limit``. The studies show that the dominance of the axial-vector meson is associated with the satisfaction of PCAC. The dominance of pion exchange is companied by the strong anomaly of PCAC.

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