2019/04/30 by Sam Junius, Laura Lopez-Honorez, Alberto Mariotti · 1 citation
Physics and Astronomy · #Astrophysics #Cosmology #Cosmology and Gravitation Theories #Coupling (piping) #Dark Matter and Cosmic Phenomena #Dark energy #Dark fluid #Dark matter #Fermion #Light dark matter #MAJORANA #Parameter space #Particle physics #Particle physics theoretical and experimental studies #Physics #Scalar (mathematics) #Scalar field dark matter #Statistics #Warm dark matter #Yukawa potential #hep-ph
paper · pdf · doi:10.1007/jhep07(2019)136
published as JHEP 1907 (2019) 136 · 32 pages, 10 figures
openalex publication_date 2019/07/01 · arxiv created 2019/09/02 · arxiv updated 2019/09/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
A bstract In this paper we study a leptophilic dark matter scenario involving feeble dark matter coupling to the Standard Model (SM) and compressed dark matter-mediator mass spectrum. We consider a simplified model where the SM is extended with one Majorana fermion, the dark matter, and one charged scalar, the mediator, coupling to the SM leptons through a Yukawa interaction. We first discuss the dependence of the dark matter relic abundance on the Yukawa coupling going continuously from freeze-in to freeze-out with an intermediate stage of conversion driven freeze-out. Focusing on the latter, we then exploit the macroscopic decay length of the charged scalar to study the resulting long-lived-particle signatures at collider and to explore the experimental reach on the viable portion of the parameter space.