Dark matter as a remnant of SQCD inflation

Abstract

We propose a strongly coupled supersymmetric gauge theory that can accommodate both the inflation (in the form of generalized hybrid inflation) and dark matter (DM).In this set-up, we identify the DM as the Goldstones associated with the breaking of a global symmetry (SU (4) × SU (4) → SU (4)) after inflation ends. Due to the non-abelian nature of this symmetry, the scenario provides with multiple DMs. We then construct a low energy theory which generates a Higgs portal like coupling of the DMs with Standard Model (SM), thus allowing them to thermally freeze out. While the scales involved in the inflation either have a dynamical origin or related to UV interpretation in terms of a heavy quark field in the supersymmetric QCD (SQCD) sector, the DM masses however are generated from explicit breaking of the chiral symmetry of the SQCD sector. We discuss DM phenomenology for both degenerate and non-degenerate cases, poised with DM-DM interactions and find allowed region of parameter space in terms of relic density and direct search constraints. IntroductionAmidst the great success of the Standard Model (SM) of particle physics, there are several intriguing issues which indicate that the SM should be extended or supplemented by some other sector (including new fields and/or gauge symmetry) in order to provide a more complete description of nature. In particular, SM fails to accommodate a large share of energy density of the universe (25%), called dark matter (DM). On the other hand, the idea of primordial inflation serves as an elegant construction which can actually resolve some of the intricate problems (e.g horizon and flatness problems) of otherwise quite successful Big Bang cosmology. This inflationary hypothesis is further strengthened by its prediction on the primordial perturbation that leads to striking agreements with the observation of the cosmic microwave background radiation (CMBR) spectrum. However, SM alone can not be responsible for such 1 subhaditya@iitg.ac.in 2 abhijit.saha@iitg.ac.in 3 asil@iitg.ac.in

Two component dark matter with inert Higgs doublet: neutrino mass, high scale validity and collider searches

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