PIRSA:16100033

Flavorful UV Instantons and the Strong CP Problem

Howe, K. (2016). Flavorful UV Instantons and the Strong CP Problem . Perimeter Institute. https://pirsa.org/16100033

Howe, Kiel. Flavorful UV Instantons and the Strong CP Problem . Perimeter Institute, Oct. 25, 2016, https://pirsa.org/16100033 

          @misc{ pirsa_PIRSA:16100033,
            doi = {10.48660/16100033},
            url = {https://pirsa.org/16100033},
            author = {Howe, Kiel},
            keywords = {Particle Physics},
            language = {en},
            title = {Flavorful UV Instantons and the Strong CP Problem },
            publisher = {Perimeter Institute},
            year = {2016},
            month = {oct},
            note = {PIRSA:16100033 see, \url{https://pirsa.org}}
          }

Kiel Howe Stanford University

DOI 10.48660/16100033
Collection
Talk Type Scientific Series
Subject

Abstract

We describe a new solution to the strong CP problem inspired by the massless up quark solution. At high energies, QCD is embedded in a SU(3)xSU(3)xSU(3) model, with each matter generation charged under a different site. Instanton effects are unsuppressed at the scale of Higgsing to the SM diagonal QCD, and a set of anomalous U(1)_PQ symmetries removes the low-energy strong CP phase. A non-zero theta parameter is generated at loop level near current bounds. Similar models can also lead to a heavy axion solution to the strong CP problem.