2015/04/29 by Diego Restrepo, Andrés Rivera, Marta Sánchez-Peláez +3
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1103/physrevd.92.013005
published as Phys. Rev. D 92, 013005 (2015) · 16 pages, 6 figures
arxiv created 2015/04/29 · openalex publication_date 2015/07/09 · arxiv updated 2015/07/15 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01
When the singlet-doublet fermion dark matter model is extended with additional Z2-odd real singlet scalars, neutrino masses and mixings can be generated at the one-loop level. In this work, we discuss the salient features arising from the combination of the two resulting simplified dark matter models. When the lightest Z2-odd particle is a scalar singlet, Br(\ensuremathμ\ensuremath→e\ensuremathγ) could be measurable provided that the singlet-doublet fermion mixing is small enough. In this scenario, the new decay channels of vector-like fermions into scalars can also generate interesting leptonic plus missing transverse energy signals at the LHC. On the other hand, in the case of doublet-like fermion dark matter, scalar coannihilations lead to an increase in the relic density which allows one to lower the bound of doublet-like fermion dark matter.