HET seminar

"Gamma5 in dimensional regularization - progress on non-anticommuting gamma5 and gauge-invariance restoration"

Presented by Dominik Stöckinger

Thursday, November 9, 2023, 11:00 am — Small Seminar Room, Bldg. 510

Abstract: Gamma5 is notoriously difficult to define in D dimensions. The traditional BMHV scheme goes back to the earliest proposals by 't Hooft and Veltman and employs a non-anticommuting gamma5. Its advantage is full mathematical consistency and the existence of all-order proofs. Its disadvantage is the spurious breaking of gauge invariance in chiral gauge theories like the electroweak standard model. In our research programme we determine the required finite counterterms needed to restore gauge invariance, to allow more straightforward applications of the BMHV scheme in future practical calculations in the EWSM and beyond. In the talk we will first present the key ideas: definition of the problem and pedagogical explanations of breaking/restoration of gauge invariance. Then we outline the current status: the 2-loop and 3-loop treatment of an abelian chiral gauge theory like the U(1) sector of the EWSM, and the 1-loop treatment of a general Yang-Mills theory with fermionic and scalar matter.

Hosted by: Duarte Fontes

Join Videoconference More Information

19495  |  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.