Measurement of cross section for e+e→Ξ0Ξ¯0 near threshold

BESIII Collaboration

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31 Scopus citations


Using e+e collision data at ten center-of-mass energies between 2.644 and 3.080 GeV collected with the BESIII detector at BEPCII and corresponding to an integrated luminosity of about 500 pb−1, we measure the cross sections and effective form factors for the process e+e→Ξ0Ξ¯0 utilizing a single-tag method. A fit to the cross section of e+e→Ξ0Ξ¯0 with a pQCD-driven power function is performed, from which no significant resonance or threshold enhancement is observed. In addition, the ratio of cross sections for the processes e+e→ΞΞ¯+ and Ξ0Ξ¯0 is calculated using recent BESIII measurement and is found to be compatible with expectation from isospin symmetry.

Original languageEnglish (US)
Article number136557
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
StatePublished - Sep 10 2021
Externally publishedYes

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Publisher Copyright:
© 2021 The Author(s)


  • Born cross section
  • Effective form factor
  • Threshold effect


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