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新山 雅之 所属 京都産業大学 理学部 物理科学科 職種 教授 |
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| 発行・発表の年月 | 2018/04 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | Production cross sections of hyperons and charmed baryons from e+e- annihilation near s =10.52 GeV |
| 執筆形態 | 共著 |
| 掲載誌名 | Physical Review D |
| 巻・号・頁 | 97,072005頁 |
| 担当区分 | 筆頭著者 |
| 国際共著 | 国際共著 |
| 著者・共著者 | M. Niiyama,M. Sumihama |
| 概要 | 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. |
| DOI | 10.1103/PhysRevD.97.072005 |
| ISSN | 2470-0010 |
| PermalinkURL | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85046756937&origin=inward |