M.E. Sainio
Abstract
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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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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.
Key concepts: Pion, Chiral perturbation theory, Physics, Amplitude, Particle physics, Low energy, Scattering amplitude, Loop (graph theory)