Theory Colloquia

Exploring the infrared structure of massless gauge theories

Name: Exploring the infrared structure of massless gauge theories
Start: 2024-04-10T14:00:00+02:00
End: 2024-04-10T16:00:00+02:00
Location: CERN

by Lorenzo Magnea

Wednesday 10 Apr 2024, 14:00 → 16:00 Europe/Zurich

4/3-006 - TH Conference Room (CERN)

4/3-006 - TH Conference Room

CERN

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Description

The problem of infrared divergences in gauge-theory scattering amplitudes is as old as quantum field theory, and has been `solved’ many times, with increasing degrees of sophistication. Perhaps surprisingly, it is still at the forefront of current research, both in view of new theoretical developments, and for phenomenological applications. I will provide an overview of the state of the art for infrared factorisation of scattering amplitudes, and then I will briefly present two current research directions: the problem of infrared subtraction for the precision calculation of collider observables, and the surprising connection between infrared behaviour in d=4 and two-dimensional conformal field theories on the `celestial sphere’.

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Elena Gianolio

Zoom Recording Operations 2, Clement Montcharmont, Irene Valenzuela Agui, Shota Komatsu, Benoit Loyer, AVC support account, Thomas Nik Bazl Fard, John Cassar, Pier Francesco Monni, Pascal Pignereau

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