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arXiv 1102.1391hep-ph
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Kaonium的手征衰变

Decay of kaonium in a chiral approach

S P Klevansky, R H Lemmer

摘要:

本文采用Oller和Oset [18]提出的方法,利用首阶手征微扰理论中的介子-介子相互作用振幅,非微扰地研究了K+K-强子原子Kaonium的衰变。数值求解了Kudryavtsev-Popov本征值方程,计算了1 s态中由于强相互作用引起的能量移动和衰变宽度。这些计算在O(4)动量空间中引入了一个截止值~ 1.4 GeV,这是调节强相互作用区中介子-介子散射振幅的发散环贡献所必需的。发现kaonium的基态的寿命为2.2 \pm 0.9 × 10- 18秒。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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