2020/01/31 by Luc Darmé, Sebastian A. R. Ellis, Sebastian A.R. Ellis +1 · 28 citations
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Dark matter #Effective field theory #Fermion #Hidden sector #Neutrino #Particle physics theoretical and experimental studies #Phenomenology (philosophy) #Quantum Chromodynamics and Particle Interactions #Singlet state #Standard Model (mathematical formulation) #hep-ex #hep-ph
paper · pdf · doi:10.1007/jhep07(2020)053
published in Journal of High Energy Physics 2020(7) (Springer Nature) · 56 pages, 15 figures, DarkEFT public code available at https://github.com/Luc-Darme/DarkEFT. References added, matches published version on JHEP
openalex created_date 2020/01/10 · openalex publication_date 2020/07/01 · arxiv created 2020/07/14 · arxiv updated 2020/08/26 · openalex updated_date 2026/08/05
A bstract Pairs of Standard Model fermions form dimension-3 singlet operators that can couple to new dark sector states. This “fermion portal” is to be contrasted with the lower-dimensional Higgs, vector and neutrino singlet portals. We characterise its distinct phenomenology and place effective field theory bounds on this framework, focusing on the case of fermion portals to a pair of light dark sector fermions. We obtain current and projected limits on the dimension-6 effective operator scale from a variety of meson decay experiments, missing energy and long-lived particle searches at colliders, as well as astrophysical and cosmological bounds. The DarkEFT public code is made available for recasting these limits, which we illustrate with various examples including an integrated- out heavy dark photon.