1-12 K*0∧Photoproduction off a Neutron

• 作者: He Jun
• 来源期刊: 中国科学院近代物理研究所和兰州重离子研究装置年报：英文版
• 学科: 物理学
• 关键词: OFF FINAL IDEAL its IS
• 年，卷（期）: 2016,（1）
• 页码范围: 21-22
• 页数: 2页
• 分类号: O435

摘要

In recent years,the strange meson photoproductions are widely investigated in both experiment and theory.Theγn→K*0Λreaction attracts special attention because of its absence of the contact term,which is usually dominant in a photoproduction process[1-6].The interaction mechanism includes the s channel with nucleon and its resonances,t channels with K andκexchanges,and the u channel with hyperon(Λ,ΣandΣ*).The t-channel K*exchange vanishes also because of the neutral charge of final K*.Usually,the contribution from the s channel with the nucleon pole is very small and negligible,and the u-channel contribution is important only at backward angles[2,3].Hence,theγn→K*0Λreaction is a very ideal channel to investigate the nucleon resonances and the t-channel K andκexchanges.