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| Description | Speaker: Gauthier Durieux (CERN) Title: Massive amplitude approach to the standard-model effective field theory Host: Zoom: https://zoom.us/j/186024391 Abstract: On-shell methods trivialize the representation of particles to provide an efficient description of their interactions, exempt from gauge or field redefinition redundancies. Applications to effective field theories led to new insights (e.g. into non-renormalizations and theory characterizations) as well as simpler methods (e.g. for operator bases constructions). The little-group-covariant treatment of massive spinors now allows for a systematic on-shell description of the standard-model effective field theory (SMEFT) from its broken phase. Putting this program on firm grounds, we bootstrapped non-renormalizable electroweak three-point amplitudes. The electroweak symmetry was explicitly seen to emerge from the requirement of perturbative unitarity. A full example of four-point amplitude was worked out, including both factorizable and contact-term contributions. The involved construction of independent massive contact terms was then addressed. These advances pave the way for a massive amplitude approach to the SMEFT. |
| Date | Tue, November 17, 2020 |
| Time | 11:00am-12:00pm PST |
| Duration | 1 hour |
| Access | Public |
| Created by | High-Energy Seminars |
| Updated | Thu, November 12, 2020 6:59pm PST |
| Send Reminder | Yes - 0 days 8 hour 0 minutes before start |
