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Natural explanation of recent results on $e^{+}e^{-}\to\Lambda\bar{\Lambda}$

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arxiv 2303.13551 v2 pith:ON7MIL76 submitted 2023-03-22 hep-ph hep-ex

classification hep-phhep-ex
keywords lambdacrossdataexperimentalrecentsectionanalyticalcorresponding
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

We show that the recent experimental data on the cross section of the process $e^{+}e^{-}\to\Lambda\bar{\Lambda}$ near the threshold can be perfectly explained by the final-state interaction of $\Lambda$ and $\bar{\Lambda}$. 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.

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Cited by 1 Pith paper

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  1. Electromagnetic form factors of hyperons in the timelike region: A short review

    hep-ph 2024-12 accept novelty 1.0 of 10

    A review of recent experimental and theoretical results on hyperon electromagnetic form factors in the timelike region, highlighting near-threshold final-state interactions.

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