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Baryon-antibaryon flavor correlations in e+e annihilation

Liang Zuo-tang

Xie Qu-bing

  • Department of Physics, Shandong University, Jinan, Shandong, China

  • Center of Theoretical Physics, Chinese Center of Advanced Science Technology (World Laboratory)
  • Department of Physics, Shandong University, Jinan, Shandong, China

Phys. Rev. D 43, 751 – Published 1 February, 1991

DOI: https://doi.org/10.1103/PhysRevD.43.751

Abstract

Under the assumption that in e+e annihilations baryons and antibaryons are produced by the stochastic combination of quarks and antiquarks, the baryon-antibaryon flavor correlations come completely from the global compensation of the flavors of all of the quarks and antiquarks. This can at least provide us with a lower limit for the baryon-antibaryon flavor correlations in various models, and by comparing them with experiment, we can see if and to what extent one has the necessity or freedom to introduce any other mechanism to produce extra baryon-antibaryon flavor correlations. Starting from this assumption, we have made calculations on 〈nΛΛ¯〉/〈nΛ〉, 〈nΞΛ¯〉/〈nΞ〉, and 〈nΛ(1520)Λ¯〉/〈nΛ(1520)〉, which have already been measured, and on similar quantities such as 〈nΣ±Λ¯〉/〈nΣ±〉, 〈nΣ*±Λ¯〉/〈nΣ*±〉,〈nΞ*Λ¯〉 〈nΞ*〉, and 〈nΩΛ¯〉/〈nΩ〉, which have not been measured yet. Comparing with the available data, it seems that there is little room left for other mechanisms which result in extra flavor correlations.

References (15)

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