High Energy / Nuclear Theory / RIKEN Seminars

[NT/RBRC hybrid seminar] Towards a Nonperturbative Construction of the S-Matrix

Name: [NT/RBRC hybrid seminar] Towards a Nonperturbative Construction of the S-Matrix
Start: 2022-10-28T11:00:00-04:00
End: 2022-10-28T13:00:00-04:00
Location: https://bnl.zoomgov.com/j/1614715193?pwd=WkwxODVWdzZzb29zQnZRVGp3VTBDQT09

by Matthew Walters (EPFL)

Friday 28 Oct 2022, 11:00 → 13:00 US/Eastern

Large Seminar Room (https://bnl.zoomgov.com/j/1614715193?pwd=WkwxODVWdzZzb29zQnZRVGp3VTBDQT09)

Large Seminar Room

https://bnl.zoomgov.com/j/1614715193?pwd=WkwxODVWdzZzb29zQnZRVGp3VTBDQT09

Description

I will present a nonperturbative recipe for directly computing the S-matrix in strongly-coupled QFTs. The method makes use of spectral data obtained in a Hamiltonian framework and can be applied to a wide range of theories, including potentially QCD. After discussing the general approach, I will demonstrate its application to the specific example of the 2+1d O(N) model at large N, using energy eigenstates computed with Hamiltonian truncation to reproduce the full 2-to-2 scattering amplitude for arbitrary (complex) center-of-mass energy. I will also discuss many avenues for future applications and generalizations.