Institute of Theoretical Physics

Key Laboratory of Theoretical Physics

  Chinese Academy of Sciences

Seminar

Title

题目

Pole counting rule and particle identification

Speaker

报告人

郑汉青 教授

Affiliation

所在单位

北京大学

Date

日期

2016年5月31日（周二）下午15：00

Venue

地点

Conference Hall 322, ITP/理论物理所322报告厅

Abstract

摘要

The pole counting rule is an elegant way to distinguish mechanisms of generating near-threshold resonances by counting the number of nearby poles of the amplitudes in the complex energy plane. This is based on the observation that an elementary particle and an S-wave two-body bound state have different numbers of poles in the near-threshold region. This rule will be discussed in details and, as an example, it will be used to show that the Zc(3900) is a DbarD* molecular state.

Contact person

所内合作者

郭奉坤