周双勇  教授学术报告

Title: Primal S-matrix bootstrap with dispersion relations

Speaker: Prof. Shuangyong Zhou (周双勇)

Affiliation: University of Science and Technology of China（中国科学技术大学）

Time: 16:00-17:00, Friday, March 20th, 2026 (UTC+8, Beijing Time)

Venue: Zoom Meeting (ID: 385 442 0225; Passcode: yauc)

Inviter: Zhijin Li（李志金）

Abstract

We propose a new method for constructing the consistent space of scattering amplitudes by parameterizing the imaginary parts of partial waves and utilizing dispersion relations, crossing symmetry, and full unitarity. Using this framework, we explicitly compute bounds on the leading couplings and examine the Regge behaviors of the constructed amplitudes. The method also readily accommodates spinning bound states, which we use to constrain glueball couplings. By incorporating dispersion relations, our approach inherently satisfies the Froissart-Martin/Jin-Martin bounds or softer high-energy behaviors by construction. This, in turn, allows us to formulate a new class of fractionally subtracted dispersion relations, through which we investigate the sensitivity of coupling bounds to the asymptotic growth rate.

Speaker

周双勇，中国科学技术大学教授。2012年获英国诺丁汉大学博士学位，之后先后在意大利SISSA、美国Case Western Reserve University、英国Imperial College London从事博士后研究。2017年入职中国科学技术大学。主要从事有效场论、S矩阵自举及引力等方面的研究，已在国际一流物理期刊发表论文70余篇，被引用近5000次。2017年受邀为Reviews of Modern Physics撰写关于引力子质量的综述文章。2022年受邀为美国物理学会粒子与场分部撰写关于高能标物理对低能有效场论约束的白皮书。2024起受邀担任Chinese Physic C编委。

The seminar will be broadcasted online by Zoom.

Interested people are free to join, without registration in advance.

The Zoom info is

URL: https://us02web.zoom.us/j/3854420225?pwd=SXY4eWJKOTBFZWJDaE16aXpTamY1QT09

Meeting ID: 385 442 0225

Passcode: yauc