Eur. Phys. J. C (2004) 36: 483-501
https://doi.org/10.1140/epjc/s2004-01959-1Spectra and decays of
https://doi.org/10.1140/epjc/s2004-01959-1
theoretical physics
Spectra and decays of 
and 
atoms
Institute for Theoretical Physics, University of Bern, Sidlerstr. 5, 3012, Bern, Switzerland
* e-mail: schweizer@itp.unibe.ch
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.
© Springer-Verlag, 2004
