Dartmouth Events

Physics & Astronomy Colloquium - Professor Srimoyee Sen, Iowa State University

Title: "Regulated chiral gauge theory and the strong CP problem”

10/3/2025
2:15 pm – 3:15 pm
Wilder 104 and Zoom
Intended Audience(s): Public
Categories: Lectures & Seminars, School of Arts and Sciences

Abstract: Chiral gauge theories, like the standard model of particle physics, are hard to define on a space-time lattice. As a result we don't have access to its complete non-perturbative physics. This is a 50 year old problem that has remained unsolved. I will discuss some recent breakthroughs that offer a solution to this problem. The idea relies on formulating four-dimensional chiral gauge theory as the boundary theory on a five-dimensional manifold in a manner that may be realized on a finite lattice. There are interesting features of these theories which defy a purely four-dimensional conception of universality. Along the way, to our great surprise, we find that QCD when embedded in a chiral gauge theory (the Standard Model) and regulated this way appears to not suffer from another long standing problem: the strong CP problem.

Informal discussion with coffee, tea, and snacks to follow.

 

Hosted by Professor Devin G. Walker

Please click the link below to join the webinar:

https://dartmouth.zoom.us/j/91888702369?pwd=aUlaVEFYNGZHNlZWL0R3cEVWQXg4UT09

For more information, contact:
Rowan Kowalsky
rowan.m.kowalsky@dartmouth.edu
Permanent URL to this event: https://physics.dartmouth.edu/events/event?event=79074

Events are free and open to the public unless otherwise noted.