Abstract
We propose a mechanism called axiogenesis where the cosmological excess of baryons over antibaryons is generated from the rotation of the QCD axion. The Peccei-Quinn (PQ) symmetry may be explicitly broken in the early Universe, inducing the rotation of a PQ charged scalar field. The rotation corresponds to the asymmetry of the PQ charge, which is converted into the baryon asymmetry via QCD and electroweak sphaleron transitions. In the concrete model we explore, interesting phenomenology arises due to the prediction of a small decay constant and the connections with new physics at the LHC and future colliders and with axion dark matter.
- Received 13 November 2019
- Revised 7 February 2020
- Accepted 14 February 2020
DOI:https://doi.org/10.1103/PhysRevLett.124.111602
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Published by the American Physical Society
Physics Subject Headings (PhySH)
synopsis
synopsisAxions Could Explain Baryon Asymmetry
Published 19 March 2020
A new theory proposes that a rotation of the axion field early in the Universe’s life could have generated matter-antimatter asymmetry.
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