Relationship of pionium lifetime with pion scattering lengths in generalized chiral perturbation theory

Details Relationship of pionium lifetime with pion scattering lengths in generalized chiral perturbation theory Relationship of pionium lifetime with pion scattering lengths in generalized chiral perturbation theory

2000-12-18

arxiv.org/abs/hep-ph/0012228v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

3 pages, 1 figure, latex, uses sprocl.sty. Talk given at the International Conference Quark Confinement and the Hadron Spectru

Scientific paper

The pionium lifetime is calculated in the framework of the quasipotential-constraint theory approach, including the sizable electromagnetic corrections. The framework of generalized chiral perturbation theory allows then an analysis of the lifetime value as a function of the pion S-wave scattering lengths with isospins I=0,2, the latter being dependent on the quark condensate value.

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