Study of hyperon mass spectra and YY interactions through precise analyses of antikaon-induced reactions

2016 Fiscal Year Final Research Report

• Project/Area Number: 25800149
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: High Energy Accelerator Research Organization (2016); Osaka University (2013-2015)
• Principal Investigator: Kamano Hiroyuki 大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 博士研究員 (00625361)
• Research Collaborator: SATO Toru ; NAKAMURA Satoshi ; LEE T.-S. Harry
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: ハイペロン / 共鳴状態 / バリオン間相互作用 / チャンネル結合 / ストレンジネス / 部分波解析 / ハドロン分光 / K中間子

Outline of Final Research Achievements

Establishing the existence and mass spectrum of hyperons is an unrgent task in relation to the study of various systems such as netron stars and hyper nuclei. In this study, we have developed a theoretical model for antikaon-proton and antikaon-deuteron reations, which rigorously treats coupled-channel effects coming from two-body as well as three-body reaction channels. We then have accomplished a comprehensive partial-wave analysis of existing data for antikaon-induced reactions. Thourhgh this analysis, we have successfully determined the mass spectrum of hyperons and discovered new hyperon resonance states. Also, we have developed a theoretical approach that enables a quantitative and accurate determination of hyperon-hyperon interactions through antikaon-deuteron reaction data.

Free Research Field

ハドロン物理