Speaker
Ryusei Sato
(Yokohama National University)
Description
The $t$-channel singularity is a divergence in the scattering amplitude which occurs when a stable particle propagating in t-channel scattering process becomes an on-shell state. Such situations appear either in the system of collider experiments or in the context of the cosmological particle production. No scheme which is generally applicable is known. In this work, we propose a new formulation to identify and remove the source of the divergence. The scheme is fully analytical and various applications can be expected. This work provides a valuable tool in this research field.ch field.
This talk is based on arXiv:2505.10890.
Primary author
Ryusei Sato
(Yokohama National University)
Co-authors
Dr
Joe Sato
(Yokohama National University)
Kento Asai
(ICRR, the University of Tokyo)
Dr
Masaki Yang
(Saitama University)
Dr
Nagisa Hiroshima
(Yokohama National)
