Non-relativistic unitarity, long-range interactions and dark matter

Unitarity has historically been a guiding principle in the search for unknown physics. While it has been extensively explored at the high-energy frontier, it has received far less attention in the non-relativistic regime. I will discuss unitarity bounds on partial-wave cross-sections and their connection to long-range interactions in the non-relativistic context. This sheds new light on the implications of unitarity and reframes its apparent violation by perturbative calculations. I will then show how resumming inelastic interactions in the self-energy is required to ensure both elastic and inelastic unitarity, and discuss implications for dark matter.

Those outside of Pisa can join with the following details:

Theory Seminar-Kalliopi Petraki
Thursday, 22 January · 11:30am – 1:30pm
Time zone: Europe/Rome
Google Meet joining info
Video call link: https://meet.google.com/dfy-jkcf-kig
Or dial: ‪(FI) +358 9 23132550‬ PIN: ‪789 421 059 2157‬#
More phone numbers: https://tel.meet/dfy-jkcf-kig?pin=7894210592157