pi+pi- Atom in Chiral Theories

Details pi+pi- Atom in Chiral Theories pi+pi- Atom in Chiral Theories

1998-07-23

arxiv.org/abs/hep-ph/9807474v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, LaTeX-file (dubna98.sty) Talk given at the International Workshop "Hadronic Atoms and Posirtonium in the Standard Mod

Scientific paper

We review the existing theoretical approaches to the study of the observables of hadronic atoms. In the relativistic perturbative approach based on the Bethe-Salpeter equation and Chiral Perturbation Theory we derive the general expression for the pi+pi- atom lifetime. The lowest-order correction to the relativistic Deser-type formula for the atom width is predicted to be 6.1\pm 3.1 %.

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