1-18 Fano Scheme of Charmonium States with Asymmetric Line Shape

• 作者: Cao Xu
• 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: Fano SCHEME CHARMONIUM
• 年，卷（期）: 2015,（1）
• 页码范围: 29-30
• 页数: 2页
• 分类号: O4

摘要

Asymmetric line shape of states is a distinguished characteristic which is often encountered when thresholds and states interacts. Fifty years ago, Fano[1] that the interaction of bare states with one or several thresholds of continua would give rise to special asymmetric peaks of the corresponding resonances, which is a common interference phenomenon in quantum physics. It is more obvious for sharp resonances, e:g:, heavy quarkonium states, because their widths are smaller by orders of magnitudes than their masses. The (3770) state is narrow with a width of around 30 MeV and locates about 35 MeV above the D￣D threshold. It is ideal to investigate how this threshold effect influences the properties of states.