Production cross sections of hyperons and charmed baryons from e+e- annihilation near s =10.52 GeV

(Belle Collaboration)

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Abstract

We measure the inclusive production cross sections of hyperons and charmed baryons from e+e- annihilation using a 800 fb-1 data sample taken near the (4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The feed-down contributions from heavy particles are subtracted using our data, and the direct production cross sections are presented for the first time. The production cross sections divided by the number of spin states for S=-1 hyperons follow an exponential function with a single slope parameter except for the Σ(1385)+ resonance. Suppression for Σ(1385)+ and Ξ(1530)0 hyperons is observed. Among the production cross sections of charmed baryons, a factor of 3 difference for Λc+ states over Σc states is observed. This observation suggests a diquark structure for these baryons.

Original languageEnglish
Article number072005
JournalPhysical Review D
Volume97
Issue number7
DOIs
Publication statusPublished - 2018 Apr 1

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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