• Open Access

Detectable Gravitational Wave Signals from Affleck-Dine Baryogenesis

Graham White, Lauren Pearce, Daniel Vagie, and Alexander Kusenko
Phys. Rev. Lett. 127, 181601 – Published 27 October 2021
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Abstract

In Affleck-Dine baryogenesis, the observed baryon asymmetry of the Universe is generated through the evolution of the vacuum expectation value of a scalar condensate. This scalar condensate generically fragments into nontopological solitons (Q balls). If they are sufficiently long-lived, they lead to an early matter domination epoch, which enhances the primordial gravitational wave signal for modes that enter the horizon during this epoch. The sudden decay of the Q balls results in a rapid transition from matter to radiation domination, producing a sharp peak in the gravitational wave power spectrum. Avoiding the gravitino over-abundance problem favors scenarios where the peak frequency of the resonance is within the range of the Einstein telescope and/or DECIGO. This observable signal provides a mechanism to test Affleck-Dine baryogenesis.

  • Figure
  • Received 9 June 2021
  • Accepted 1 October 2021

DOI:https://doi.org/10.1103/PhysRevLett.127.181601

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)

Particles & FieldsGravitation, Cosmology & Astrophysics

Authors & Affiliations

Graham White1,*, Lauren Pearce2,†, Daniel Vagie3,‡, and Alexander Kusenko4,1,§

  • 1Kavli IPMU (WPI), UTIAS, The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
  • 2Pennsylvania State University-New Kensington, New Kensington, Pennsylvania 15068, USA
  • 3Department of Physics and Astronomy, University of Oklahoma, Norman, Oklahoma 73019, USA
  • 4Department of Physics and Astronomy, University of California, Los Angeles, Los Angeles, California 90095, USA

  • *graham.white@ipmu.jp
  • lpearce@psu.edu
  • daniel.d.vagie-1@ou.edu
  • §kusenko@g.ucla.edu

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Issue

Vol. 127, Iss. 18 — 29 October 2021

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