2015/06/11 by Vannia González Macías, Macias, Vannia Gonzalez, José Wudka +1 · 1 citation
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.1506.03825
openalex publication_date 2015/06/11 · openalex created_date 2022/10/06 · openalex updated_date 2026/07/28
In this article we discuss a general effective-theory description of a\nmulti-component dark sector with an unspecified non-trivial symmetry and its\ninteractions with the Standard Model generated by the exchange of heavy\nmediators. We then categorize the relevant effective operators given the\ncurrent experimental sensistivity where the underlying theory is weakly coupled\nand renormalizable, with neutral mediators: either scalars or fermions. An\ninteresting scenario resulting from this categorization is the neutrino portal,\nwhere only fermion mediators are present, and where the dark sector consists of\nfermions and scalars such that the lightest dark particle is a fermion, this\nscenario is characterized by having naturally suppressed couplings of the DM to\nall SM particles except the neutrinos and has received little attention in the\nliterature. We find that there is a wide region in parameter space allowed by\nthe current experimental constraints (relic abundance, direct and indirect\ndetection limits); the cleanest signature of this paradigm is the presence of\nmonochromatic neutrino lines with energy equal to that of the DM mass, but\nexperimental sensitivity would have to be improved significantly before this\ncan be probed.\n