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The cross section of the process $e^+e^- \to \Lambda\bar{\Lambda}$ in the vicinity of charmonium $\psi(3770)$ including three-gluon and $D$-meson loop contributions

High Energy Physics - Phenomenology 2022-06-29 v1
Authors: Yu. M. Bystritskiy , A. I. Ahmadov
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Abstract

The total cross section of the process e+e−→ΛΛˉe^+e^- \to \Lambda\bar{\Lambda} is calculated within the energy range close to the mass of ψ(3770)\psi(3770) charmonium state. Two different contributions were considered: the DD-meson loop and the three gluon charmonium annihilation one. Both of them contribute noticeably and in sum fairly reproduce the data. Large relative phase for these contributions are generated with respect to the pure electromagnetic mechanism. As a by product the fit for the electromagnetic form factor of Λ\Lambda-hyperon is obtained for the large momentum transferred region.

Keywords

e+e- annihilation lambda baryon production psi(3770) d-meson loop three-gluon annihilation electromagnetic form factor charmonium

Cite

@article{arxiv.2204.08956,
  title  = {The cross section of the process $e^+e^- \to \Lambda\bar{\Lambda}$ in the vicinity of charmonium $\psi(3770)$ including three-gluon and $D$-meson loop contributions},
  author = {Yu. M. Bystritskiy and A. I. Ahmadov},
  journal= {arXiv preprint arXiv:2204.08956},
  year   = {2022}
}

Comments

8 pages, 11 figures. arXiv admin note: text overlap with arXiv:2104.01483

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