We apply the Effective Field Theory of Large Scale Structure (EFTofLSS) to non-standard models of dark matter with suppressed small-scale structure imprinted by early-time physics, here exemplified by interacting dark matter (IDM) coupled to standard model neutrinos, and cross-check that the EFTofLSS has no trouble replicating the real-space halo-halo power spectrum from N-body simulations. We perform forecasts for a DESI ELG-like experiment using the redshift-space power spectrum and find that, under very conservative priors on these parameters, the EFTofLSS is not expected to yield strong constraints on dark matter interactions. However, with a better understanding of the evolution of counterterms and stochastic terms with redshift, realistic IDM models could in principle be detected using the full-shape power spectrum analysis of such a spectroscopic galaxy survey.
@article{arxiv.2410.08163,
title = {DESI forecast for Dark Matter-Neutrino interactions using EFTofLSS},
author = {Markus R. Mosbech and Santiago Casas and Julien Lesgourgues and Dennis Linde and Azadeh Moradinezhad Dizgah and Christian Radermacher and Jannik Truong},
journal= {arXiv preprint arXiv:2410.08163},
year = {2025}
}
Comments
24 pages, 7 figures, matches version accepted for publication