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Spectra and decays of $pi pi$ and $pi K$ atoms |
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| Authors: | J.?Schweizer author-information" > author-information__contact u-icon-before" > mailto:schweizer@itp.unibe.ch" title=" schweizer@itp.unibe.ch" itemprop=" email" data-track=" click" data-track-action=" Email author" data-track-label=" " >Email author |
| Affiliation: | (1) Institute for Theoretical Physics, University of Bern, Sidlerstr. 5, 3012 Bern, Switzerland |
| Abstract: | We describe the spectra and decays of  and  atoms within a non-relativistic effective field theory. The evaluations of the energy shifts and widths are performed at next-to-leading order in isospin symmetry breaking. We provide general formulae for all S-states, and discuss the states with angular momentum one in some detail. The prediction for the lifetime of the  atom in its ground state yields  s.Received: 9 May 2004, Published online: 23 July 2004 |
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