PIRSA:16100033 Scientific Series Particle Physics

DOI10.48660/16100033

Series: Particle Physics

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}}
}

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.

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