https://doi.org/10.1140/epjc/s10052-006-0076-7
Regular Article - Theoretical Physics
Energy and decay width of the πK atom
1
Centre National des Sciences et Technologies Nucléaires, Technopole Sidi Thabet, 2020, Tunisie
2
Institut de Physique Nucléaire, Groupe de Physique Théorique, Université Paris XI, 91406, Orsay Cedex, France
* e-mail: sazdjian@ipno.in2p3.fr
Received:
26
May
2006
Revised:
13
July
2006
Published online:
27
October
2006
The energy and the decay width of the πK atom are evaluated in the framework of the quasipotential-constraint theory approach. The main electromagnetic and isospin symmetry breaking corrections to the lowest-order formulas for the energy shift from the Coulomb binding energy and for the decay width are calculated. They are estimated to be of the order of a few per cent. We display formulas to extract the strong interaction S-wave πK scattering lengths from future experimental data concerning the πK atom.
© Springer-Verlag Berlin Heidelberg, 2006
