首 页机构概况机构设置科研人才队伍合作交流研究生教育博士后图书馆创新文化党群园地院重点实验室彭桓武中心信息公开
  学术活动
  您现在的位置:首页 > 学术活动 > 专题学术报告/Seminar
(Seminar) Sigma term physics
2019-07-17  【 】【打印】【关闭

CAS Key Laboratory of Theoretical Physics

Institute of Theoretical Physics

Chinese Academy of Sciences

Seminar

Title

题目

Sigma term physics

Speaker

报告人

Prof. Ulf-G. Meissner

Affiliation

所在单位

University Bonn & Forschungszentrum Jülich

Date

日期

2019年7月17日(周三)上午10:00

Venue

地点

ITP South Building 6420

Abstract

摘要

The pion-nucleon sigma term sigma_{pi N} is an important quantity in strong interaction phenomenology and in searches for physics beyond the Standard Model. After a broad introduction, I discuss its precise extraction from pion-nucleon scattering data based on Roy-Steiner equations. In this context, tensions with recent lattice determination of sigma_{pi N} are discussed. Then, I turn to the flavor decomposition of the sigma term and the question of strangeness in the nucleon. Using different variants of baryon chiral perturbation theory, I discuss our present understanding and future improvements.

Contact Person

所内联系人

郭奉坤

IE6.0浏览器,1024X768分辨率 版权所有 © 中国科学院理论物理研究所
地址:北京市海淀区中关村东路55号 邮政编码:100190
京ICP备05002865号】 京公网安备1101080094号