arXiv:0903.0257·v2·High Energy Physics — Phenomenology
Hadronic Atoms
J. Gasser (Bern U.)🇨🇭 · V.E. Lyubovitskij (Tuebingen U.)🇩🇪 · A. Rusetsky (Bonn U., HISKP)🇩🇪
Abstract
We review the theory of hadronic atoms in QCD+QED. The non-relativistic effective Lagrangian approach, used to describe this type of bound states, is illustrated with the case of pi+pi- atoms. In addition, we discuss the evaluation of isospin-breaking corrections to hadronic atom observables by invoking chiral perturbation theory.
Comments: Commissioned article for Ann. Rev. Nucl. Part. Sci., 34 pages, 5 figures, 3 references added