Abstract
We study Dark Matter (DM) phenomenology with multiple DM species consisting of both scalar and vector DM particles. More specifically, we study the Hidden Gauged SU(3) model of Arcadi {\it et al}. Before proceeding to the Hidden Gauged SU(3) model, we study the relic abundances of simplified multi-species DM scenarios to gain some insights when multiple species and interactions are included. In the Hidden Gauged SU(3) model, because of the large parameter space, we restrict ourselves to three representative benchmark points, each with multiple DM species. The relic densities for the benchmark points were found using a program developed to solve the coupled Boltzmann equations for an arbitrary number of interacting DM species with two particles in the final state. For each case, we varied the mass of the DM particles and then found the value of the dark SU(3) gauge coupling that gives the correct relic density. We found that in some regions of the parameter space, the DM would be difficult to observe in direct detection experiments while easier to observe in indirect detection experiments and vice versa, so that complementary measurements could help pinpoint the details of the Hidden Gauged SU(3) model. Important to this, is that even for moderate changes in input parameter values, the relative relic density of each species can change significantly resulting in large changes in the observability of multi-species DM by direct or indirect detection.
Highlights
The nature of Dark Matter (DM) is one of the biggest puzzles in particle physics
The parameter values for benchmark point A were chosen to explore the region where one of the DM species could annihilate to Standard Model (SM) particles through a Higgs resonance
This paper reported a study of multispecies DM, in particular, the hidden gauged SU(3) model
Summary
The nature of Dark Matter (DM) is one of the biggest puzzles in particle physics. The evidence for DM in the Universe comes from a wide variety of astrophysical and cosmological observations, and there has been considerable theoretical effort to understand its nature (for recent reviews, see, e.g., Refs. [1,2,3,4,5]). In a scenario with multiple DM species, a moderate change in the input parameter values can lead to major differences in the relative relic densities of the stable DM species This would have a major impact on whether DM could be observed by direct or indirect detection experiments. This is the core ingredient of the paper needed to calculate the subsequent results for the hidden gauged SU(3) model.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
