Pion-pion interaction at low energy

Details Pion-pion interaction at low energy Pion-pion interaction at low energy

1998-08-03

arxiv.org/abs/hep-ph/9808209v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 2 figures, Proc. Int. Workshop Hadronic Atoms and Positronium in the Standard Model, Dubna, Russia, May 26-31, 1998

Scientific paper

A brief discussion of the elastic pion-pion scattering amplitude to two loops
in chiral perturbation theory is given. Some technical details of the
evaluation of two-loop diagrams are addressed, and results relevant for the
pionium decay are presented.

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