Decay of kaonium in a chiral approach

作者：Klevansky S P^*; Lemmer R H

来源：Physics Letters B, 2011, 702(4): 235-241.

DOI：10.1016/j.physletb.2011.07.002

• Kaons
• Kaonic decay
• Chiral symmetry

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 (1997) [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 similar to 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 +/- 0.9) x 10(-18) s for the ground state of kaonium.

• 出版日期2011-8-19