[Theory-seminars] Theory Seminar Monday (hybrid) - Yuchuan Feng

[Zheng-Yang Li]

Dear all,

On Monday, March 10th, 2025 at 1:00PM EDT, we will have a hybrid seminar given by Yuchuan Feng of George Washington University, in person in CC L102 and on the following Zoom link:

https://jlab-org.zoomgov.com/j/1605519910?pwd=gw9JbktkW2md9FsFnxDJfvFbd3eUl6.1
Join our Cloud HD Video Meeting<https://jlab-org.zoomgov.com/j/1605519910?pwd=gw9JbktkW2md9FsFnxDJfvFbd3eUl6.1>
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Please see below for the title and abstract.

Theory Seminar: March 10th, 1pm EDT (hybrid)

Speaker: Yuchuan Feng (George Washington University)

Title: Progress in Coupled-Channel Three-Body Scattering

Abstract: Including three-body dynamics above threshold is required for the reliable extraction of many amplitudes and resonances from experiment and lattice QCD. The S-matrix principle of unitarity can be used to construct amplitudes for three-particle scattering, rearranging two-body subsystems by particle exchange. Our work presents a unitary coupled-channel method that includes pions and kaons, evaluated for the example of the a1(1260) system. The model contains two-body S- and P-wave subsystems (isobars) of all isospins. We evaluate and compare the production amplitudes for physical momenta with traditional isobar lineshapes to show coupled-channel and rescattering effects.

See you on Monday.

Best regards,

Joe, Zheng-Yang, and Gloria
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