In recent years, S-matrix-based computational methods have experienced a resurgence, offering a powerful and elegant approach to extracting physical quantities without relying on an explicit Lagrangian formulation. In this talk, I will revisit and extend the formalism introduced by Dashen, Ma, and Bernstein, which connects the thermodynamics of relativistic systems to information encoded in their scattering amplitudes. As a concrete application, I will explore the thermodynamics of a long confining flux tube in d-dimensions, analyzing thermal effects up to and including next-to-next-to-leading order contributions. I will compare the results with those obtained from the thermodynamic Bethe ansatz. I will also discuss how these techniques allow for the inclusion of non-universal effects in the study of flux tubes, while relying solely on the S-matrix as input.
Hybrid access via ZOOM:
https://lmu-munich.zoom.us/j/98457332925?pwd=TWc3V1JkSHpyOTBPQVlMelhuNnZ1dz09
Meeting ID: 984 5733 2925
Passcode: 979953
Peter Thirolf (LMU) / Norbert Kaiser (TUM)