HET seminar

"Gauge Invariance and Observables in Particle Physics"

Presented by Axel Maas

Thursday, February 15, 2024, 11:00 am — Small Seminar Room, Bldg. 510

Abstract: On a formal, fundamental level in a non-Abelian gauge theory only composite fields can be gauge-invariant, rather than the elementary fields employed in perturbation theory. While at first sight in contradiction to the phenomenological success of perturbation theory in electroweak physics, there is a deeper reason for both being compatible, the Fröhlich-Morchio-Strocchi mechanism. Its working and validity hasbeen demonstrated explicitly in lattice simulations. However, even then this leaves still room for new phenomena in the standard model. Moreover, the standard model is special. Beyond the standard model these issues yield qualitative changes and affect such varied scenarios like grand-unified theories, supersymmetry, and quantum gravity. The talk provides an overview of the underlying mechanisms, including some lattice results in their support, and finally highlights a few example applications.

Hosted by: Sally Dawson

Join Videoconference More Information

19851  |  INT/EXT  |  Events Calendar


Not all computers/devices will add this event to your calendar automatically.

A calendar event file named "calendar.ics" will be placed in your downloads location. Depending on how your device/computer is configured, you may have to locate this file and double click on it to add the event to your calendar.

Event dates, times, and locations are subject to change. Event details will not be updated automatically once you add this event to your own calendar. Check the Lab's Events Calendar to ensure that you have the latest event information.