Relativistic corrections to the Pionium Lifetime

Details Relativistic corrections to the Pionium Lifetime Relativistic corrections to the Pionium Lifetime

1999-05-28

arxiv.org/abs/hep-ph/9905539v2

Phys.Rev. D61 (2000) 077506

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, Latex. Includes corrections based on a more precise matching to the pion-pion scattering amplitude from chiral pertur

Scientific paper

10.1103/PhysRevD.61.077506

Next to leading order contributions to the pionium lifetime are considered within non-relativistic effective field theory. A more precise determination of the coupling constants is then needed in order to be consistent with the relativistic pion-pion scattering amplitude which can be obtained from chiral perturbation theory. The relativistic correction is found to be 4.1% and corresponds simply to a more accurate value for the non-relativistic decay momentum.

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