Tests for the asymptotic behaviour of the gamma^* --> gamma pi^0 form factor

Details Tests for the asymptotic behaviour of the gamma^* --> gamma pi^0 form factor Tests for the asymptotic behaviour of the gamma^* --> gamma pi^0 form factor

1997-09-19

arxiv.org/abs/hep-ph/9709404v2

Phys.Lett. B425 (1998) 365-368

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex, 7 pages + 1 .ps figure, comments on the Brodsky-Lepage limit and 5 new references added

Scientific paper

10.1016/S0370-2693(98)00245-7

The gamma^* --> gamma pi^0 transition measured at different photon
virtualities already provides us with a clean test for the behaviour of the
pi^0 gamma^* gamma off-shell axial anomaly at large time-like squared momenta.
It also allows reliable predictions for the branching ratio of heavy quarkonium
decays into omega pi^0.

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