Generalised form factor dark matter in the Sun

Vincent, Aaron C.; Serenelli, Aldo; Scott, Pat

Abstract

We study the effects of energy transport in the Sun by asymmetric dark matter with momentum and velocity-dependent interactions, with an eye to solving the decade-old Solar Abundance Problem. We study effective theories where the dark matter-nucleon scattering cross-section goes as vrel2n and q2n with n = −1, 0, 1 or 2, where vrel is the dark matter-nucleon relative velocity and q is the momentum exchanged in the collision. Such cross-sections can arise generically as leading terms from the most basic nonstandard DM-quark operators. We employ a high-precision solar simulation code to study the impact on solar neutrino rates, the sound speed profile, convective zone depth, surface helium abundance and small frequency separations. We find that the majority of models that improve agreement with the observed sound speed profile and depth of the convection zone also reduce neutrino fluxes beyond the level that can be reasonably accommodated by measurement and theory errors. However, a few specific points in parameter space yield a significant overall improvement. A 3–5 GeV DM particle with σSI ∝ q2 is particularly appealing, yielding more than a 6σ improvement with respect to standard solar models, while being allowed by direct detection and collider limits. We provide full analytical capture expressions for q- and vrel-dependent scattering, as well as complete likelihood tables for all models.

Citation

Vincent, A. C., Serenelli, A., & Scott, P. (2015). Generalised form factor dark matter in the Sun. Journal of Cosmology and Astroparticle Physics, 2015(08), Article 040. https://doi.org/10.1088/1475-7516/2015/08/040

• Journal Article Type: Article
• Acceptance Date: Jul 31, 2015
• Online Publication Date: Aug 19, 2015
• Publication Date: Aug 31, 2015
• Deposit Date: Apr 23, 2019
• Publicly Available Date: Apr 23, 2019
• Journal: Journal of Cosmology and Astroparticle Physics
• Publisher: IOP Publishing
• Peer Reviewed: Peer Reviewed
• Volume: 2015
• Issue: 08
• Article Number: 040
• DOI: https://doi.org/10.1088/1475-7516/2015/08/040