FIZIKA B 4 (1995) 3, 247-258

CHIRAL ANOMALY ROUTE TO THE K_L® p⁺ p^- g DECAY

KREŠIMIR KUMERIČKI and IVICA PICEK
Department of Physics, Faculty of Science, University of Zagreb, POB 162, 10000 Zagreb, Croatia

Dedicated to Professor Mladen Paić on the occasion of his 90^th birthday

Received 27 June 1995

The increasing body of experimental data motivates us to investigate a new contribution to the radiative K_L® p⁺ p^- g decay, which is O(p⁴) within the framework of the chiral perturbation theory. The new contribution refers to the DS = 1 WZW action term, established recently for the direct, O(p⁴), K_L® gg(-) decay amplitude. We present additional evidence in support of such flavour-changing generalization of the WZW action term as a viable parametrisation of the anomalous radiative non-leptonic kaon decays.

UDC 539.12
PACS 12.15.-y, 12.39.Fe

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