Department
Physics
Document Type
Article
Publication Date
4-2018
Embargo Period
7-3-2018
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 Υ(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 Λ+c states over Σc states is observed. This observation suggests a diquark structure for these baryons.
Journal Title
Physical Review D
Journal ISSN
2470-0010
Volume
97
Issue
7
Digital Object Identifier (DOI)
10.1103/PhysRevD.97.072005
Comments
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.