About
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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The talk
Credits and licence
- Institution
- CERN
- Department
- Theory Colloquia
- Speaker
- Lorenzo Magnea
- Year
- 2024
- Language
- English
- Source
- CERN
- Licence
- CERN, as CERN states it. CERN's terms
- Attribution
- © CERN. CERN provides its audiovisual media free of charge for educational and informational use, credited to CERN; this lecture is shown in CERN's own player.
- Who can watch
- CERN gives no rating. Invisible Network shows it to Teens profiles and older, judged from what the source says about it. How courses are placed