Two-Meson Form Factors in Unitarized Chiral Perturbation Theory

by Dr Yuji Shi (HISKP, Bonn University)

Tuesday 2 Mar 2021, 10:00 → 11:00 Asia/Shanghai

Tsung-Dao Lee library/Fourth Floor-410 - 410# Meeting Room (Tsung-Dao Lee Library)

Abstract:

The study of multi-meson systems is an interesting problem as they are universal in various physical processes. To analyze such process one should consider the effect of the low-energy interaction of the final mesons, which is generally described by the two-meson form factors. We present a comprehensive analysis of  the two-meson form factors induced by scalar, vector, and tensor quark operators. The theoretical framework is based on a combination of unitarized chiral perturbation theory (uChPT) and dispersion relations. The low-energy constants in chiral perturbation theory are fixed by a global fit to the available data of the two-meson scattering phase shifts. Each form factor derived from uChPT is improved by iteratively applying a dispersion relation. This study updates the existing results in the literature and explores those that have not been systematically studied previously, in particular the two-meson tensor form factors. Some applications of these form factors are also introduced in this work.

Biography：

Postdoc. Theoretical Particle Physics and Hadron Physics, HISKP, Bonn University, Sep. 2019–present.

Ph.D. Theoretical Particle Physics, INPAC, School of Physics and Astronomy, Shanghai Jiao Tong University, Sep. 2014–Jun. 2019.

B.S. Physics, School of Physics and Astronomy, Shanghai Jiao Tong University, Sep. 2010–Jun. 2014.

 

Meeting room:  https://zoom.com.cn/j/93579891950 

Password:  123456