Chiral expansion of the ${\pi }^0\to \gamma \gamma$ decay width

Abstract

A chiral field theory of mesons has been applied to study the contribution of the current quark masses to the ${\pi }^0\to \gamma \gamma$ decay width at the next leading order. $2\%$ enhancement has been predicted and there is no new parameter.

9 pages

References in corpus (1)

• Axial anomaly and the precise value of the ${\pi }^0\to 2\gamma$ decay width

Cited by in corpus (1)

• On the possibility to measure the (pi0 to gamma gamma) decay width and the (gamma* gamma to pi0) transition form factor with the KLOE-2 experiment