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  • Open Access

Scalar Relics from the Hot Big Bang

David Cyncynates1,* and Olivier Simon2,†

  • *Contact author: davidcyn@uw.edu
  • †Contact author: osimon@princeton.edu
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Phys. Rev. Lett. 135, 101003 – Published 3 September, 2025

DOI: https://doi.org/10.1103/wjt8-9dh9

Abstract

In this Letter, we motivate the fact that couplings between a scalar field and the standard model with strengths 10−6(mϕ/eV)−1/4 relative to gravity yield the total measured cosmological dark matter abundance over a broad mass range of 10−12 to 1014  eV. Remarkably, this result holds with minimal sensitivity to whether the scalar couples to electrons, photons, hadrons, or other particles at laboratory energy scales, thereby linking fifth force experiments to the search for dark matter.

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Minimal targets for dilaton direct detection

David Cyncynates and Olivier Simon
Phys. Rev. D 112, 055002 (2025)

Article Text

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Phys. Rev. Lett. 135, 101003– Published 3 September, 2025
  • Received 31 October 2024
  • Revised 26 May 2025
  • Accepted 4 August 2025
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