High Energy Physics Seminar

Monday, October 31, 2022
2:00pm to 3:00pm
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Online and In-Person Event
5D Perspectives on the QCD Axion
Tony Ghergetta, University of Minnesota,

Note: Special Time

The talk is in 469 Lauritsen.

The QCD axion provides a solution to both the strong CP and dark matter problems in the Standard Model. However, the axion solution requires that the gravitational violation of the Peccei-Quinn global symmetry be suppressed to an extremely high order. This so-called axion quality problem can be addressed in 5D models that predict flavor-dependent axion-fermion couplings. Moreover, 5D models also allow for the intriguing possibility that the axion mass could be enhanced while still solving the strong CP problem. These features have implications for the ongoing experimental axion searches and give rise to new possibilities in early universe cosmology.

Contact theoryinfo@caltech.edu for Zoom link