2021/12/31 by Simone Biondini, Vladyslav Shtabovenko · 14 citations
Physics and Astronomy · #Astrophysics #Bound state #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Dark fluid #Dark matter #Equation of state #Fermion #Meson #Particle physics #Particle physics theoretical and experimental studies #Physics #Pseudoscalar #Quantum mechanics #Scalar (mathematics) #Scalar field dark matter #Scaling #Theoretical physics #Yukawa potential #hep-ph
paper · pdf · open access · doi:10.1007/jhep03(2022)172
published in Journal of High Energy Physics 2022(3) (Springer Nature) · 47 pages, 11 figures, journal version, references added
openalex publication_date 2022/03/01 · arxiv created 2022/03/22 · openalex created_date 2022/04/03 · arxiv updated 2022/04/13 · openalex updated_date 2026/08/06
Dark matter models with light mediators featuring sizable interactions among dark particles enjoy an increasing attention in the model building community due to the elegance with which they can potentially explain the scaling relations governing galactic halos and clusters of galaxies. In the present work we continue our study of such models using non-relativistic and potential non-relativistic effective field theories (NREFTs and pNREFTs) and explore the properties of a Yukawa-type model with scalar and pseudoscalar interactions between a low-energetic scalar mediator and heavy dark matter fermions. In particular, we make first steps towards the formulation of such theories at finite temperature by providing the thermal bound-state formation rate and the thermal break-up of bound states from the self-energies of the dark-pair fields, that interact with the thermal environment. We estimate numerically bound-state effects on the dark matter energy density, that provide up to a 35% correction depending on the relative size of the model couplings.