Energy and decay width of the pi-K atom

Details Energy and decay width of the pi-K atom Energy and decay width of the pi-K atom

2006-05-24

arxiv.org/abs/hep-ph/0605253v1

Eur.Phys.J.C48:561-578,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

37 pages, 5 figures, uses Axodraw

Scientific paper

10.1140/epjc/s10052-006-0076-7

The energy and decay width of the pi-K 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 pi-K scattering lengths from future experimental data concerning the pi-K atom.

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