Electromagnetic corrections to gamma pi(+) -> pi(0) pi(+)

Details Electromagnetic corrections to gamma pi(+) -> pi(0) pi(+) Electromagnetic corrections to gamma pi(+) -> pi(0) pi(+)

2001-07-11

arxiv.org/abs/hep-ph/0107127v2

Phys.Rev. D64 (2001) 094009

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, 4 figures, fixed two typos, no changes

Scientific paper

10.1103/PhysRevD.64.094009

The amplitude for the anomalous transitions gamma pi(+) -> pi(0) pi(+) is analyzed within Chiral Perturbation Theory including electromagnetic interactions. The presence of a t-channel one-photon exchange contribution induces sizeable e^2 corrections which enhance the cross-section in the threshold region and bring the theoretical prediction into agreement with available data. In the case of the crossed reaction gamma pi(0) -> pi(+) pi(-), the same contribution appears in the s-channel and its effects are small.

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