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

Here, 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$$+\atop{c}$$ states over Σ c states is observed. This observation suggests a diquark structure for these baryons.
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Publication Date:
Grant/Contract Number:
AC0576RL01830; P 26794-N20; 10575109; 10775142; 10875115; 11175187; 11475187; 11521505; 11575017; LTT17020; 2011-0029457; 2012-0008143; 2014R1A2A2A01005286; 2014R1A2A2A01002734; 2015R1A2A2A01003280; 2015H1A2A1033649; 2016R1D1A1B01010135; 2016K1A3A7A09005603; 2016K1A3A7A09005604; 2016R1D1A1B02012900; 2016K1A3A7A09005606; NRF-2013K1A3A7A06056592
Type:
Published Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 97; Journal Issue: 7; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Research Org:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org:
USDOE
Contributing Orgs:
Belle Collaboration
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; particle production
OSTI Identifier:
1432403
Alternate Identifier(s):
OSTI ID: 1434668