Phenomenology of ELDER dark matter

Phenomenology of ELDER dark matter

Blog Article

vaping walrus Abstract We explore the phenomenology of Elastically Decoupling Relic (ELDER) dark matter.ELDER is a thermal relic whose present density is determined primarily by the cross-section of its elastic scattering off Standard Model (SM) particles.Assuming that this scattering is mediated by a kinetically mixed dark photon, we argue that the ELDER scenario makes robust predictions for electron-recoil direct-detection experiments, as well as for dark photon searches.

These predictions are independent of the details of interactions within the dark sector.Together with the closely related Strongly-Interacting Massive Particle (SIMP) scenario, the ELDER predictions provide a physically motivated, well-defined target region, which will be almost entirely accessible to the next generation of searches for sub-GeV dark matter and dark photons.We provide useful analytic approximations for 15-eg1053cl various quantities of interest in the ELDER scenario, and discuss two simple renormalizable toy models which incorporate the required strong number-changing interactions among the ELDERs, as well as explicitly implement the coupling to electrons via the dark photon portal.