Natural Explanation of Recent Results on e+e- → λλ¯

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We show that the recent experimental data on the cross section of the process e+e- ΛΛ¯  near the threshold can be perfectly explained by the final-state interaction of Λ and  Λ¯. The enhancement of the cross section is related to the existence of low-energy real or virtual state in the corresponding potential. We present a simple analytical formula that fits the experimental data very well.

作者简介

A. Mil'shteyn

Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia; Novosibirsk State University, 630090, Novosibirsk, Russia

Email: a.i.milstein@inp.nsk.su

S. Sal'nikov

Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia; Novosibirsk State University, 630090, Novosibirsk, Russia

编辑信件的主要联系方式.
Email: s.g.salnikov@inp.nsk.su

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