Rogers, Keir K;
Dvorkin, Cora;
Peiris, Hiranya V;
(2022)
Limits on the Light Dark Matter–Proton Cross Section from Cosmic Large-Scale Structure.
Physical Review Letters
, 128
(17)
, Article 171301. 10.1103/physrevlett.128.171301.
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Abstract
We set the strongest limits to-date on the velocity-independent dark matter (DM) - proton cross section $\sigma$ for DM masses $m = 10\,\mathrm{keV}$ to $100\,\mathrm{GeV}$, using large-scale structure traced by the Lyman-alpha forest: e.g., a 95% lower limit $\sigma < 6 \times 10^{-30}\,\mathrm{cm}^2$, for $m = 100\,\mathrm{keV}$. Our results complement direct detection, which has limited sensitivity to sub-GeV DM. We use an emulator of cosmological simulations, combined with data from the smallest cosmological scales used to-date, to model and search for the imprint of primordial DM-proton collisions. Cosmological bounds are improved by up to a factor of 25.
| Type: | Article |
|---|---|
| Title: | Limits on the Light Dark Matter–Proton Cross Section from Cosmic Large-Scale Structure |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/physrevlett.128.171301 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.128.171301 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | astro-ph.CO, astro-ph.CO, hep-ph |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10148224 |
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