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  • Letter
  • Open Access

Near-threshold resonance in e+e−→ΛcΛ¯c process

S. G. Salnikov* and A. I. Milstein†

  • Budker Institute of Nuclear Physics, 630090, Novosibirsk, Russia and Novosibirsk State University, 630090, Novosibirsk, Russia

  • *S.G.Salnikov@inp.nsk.su
  • †A.I.Milstein@inp.nsk.su
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Phys. Rev. D 108, L071505 – Published 27 October, 2023

DOI: https://doi.org/10.1103/PhysRevD.108.L071505

Abstract

We discuss the influence of various contributions of the ΛcΛ¯c potential on the energy dependence of the cross section e+e−→ΛcΛ¯c near the threshold. New BESIII experimental data on the cross section and electromagnetic form factors GE and GM are taken into account. Our predictions are in good agreement with experimental data. We predict a bound state of ΛcΛ¯c at energy ∼38  MeV below the threshold that may manifest itself in anomalous behavior of light meson production cross sections in a given energy region.

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Phys. Rev. D 108, L071505– Published 27 October, 2023
  • Received 2 October 2023
  • Accepted 5 October 2023
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