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arXiv · 1102.1391

Decay of kaonium in a chiral approach

S P Klevansky·R H Lemmer
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Abstract

The decay of the K+K- hadronic atom kaonium is investigated non-perturbatively using meson-meson interaction amplitudes taken from leading order chiral perturbation theory in an approach adapted from that proposed by Oller and Oset [18]. The Kudryavtsev-Popov eigenvalue equation is solved numerically for the energy shift and decay width due to strong interactions in the 1s state. These calculations introduce a cutoff ~ 1.4 GeV in O(4) momentum space that is necessary to regulate divergent loop contributions to the meson-meson scattering amplitudes in the strong-interaction sector. One finds lifetimes of 2.2 \pm 0.9 x 10-18s for the ground state of kaonium.

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S P Klevansky, R H Lemmer. 2011-02-07. Decay of kaonium in a chiral approach. https://doi.org/10.1016/j.physletb.2011.07.002

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