A feeble window on leptophilic dark matter

A feeble window on leptophilic dark matter

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Abstract In this paper we study a leptophilic dark matter scenario involving feeble dark matter coupling to the Standard Model (SM) and compressed dark matter-mediator mass spectrum.We consider a simplified model where the SM is extended with one Majorana fermion, us polo assn womens socks the dark matter, and one charged scalar, the mediator, coupling to the SM leptons through a Yukawa interaction.We first discuss the dependence of the dark matter relic abundance on the Yukawa coupling going continuously from freeze-in to freeze-out with an intermediate stage of conversion driven freeze-out.

Focusing on the latter, we argan oil pure purple then exploit the macroscopic decay length of the charged scalar to study the resulting long-lived-particle signatures at collider and to explore the experimental reach on the viable portion of the parameter space.