HET Seminar

"A Nonperturbative Regulator for Chiral Gauge Theories and Fluffy Mirror Fermions"

Presented by Dorota Grabowska, University of Washington

Monday, November 30, 2015, 4:00 pm — Building 510 Room 2-160

I discuss a new proposal for nonperturbatively defining chiral gauge theories, something that has resisted previous attempts. The proposal is a well defined field theoretic framework that contains mirror fermions with very soft form factors, which allows them to decouple, as well as ordinary fermions with conventional couplings. The construction makes use of an extra dimension, which localizes chiral zeromodes on the boundaries, and a four dimensional gauge field extended into the bulk via classical gradient flow. After explaining how this setup works, I consider open questions concerning the flow of topological gauge configurations, as well as possible exotic phenomenology in the Standard Model lurking at the low energy frontier.

Hosted by: Michael Creutz

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