Leptophilic Dark Matter

TL;DR

This paper proposes a simple leptophilic dark matter model with a broken U(1) gauge symmetry that explains cosmic ray excesses and DAMA signals while satisfying existing constraints.

Contribution

It introduces a novel dark sector model featuring a broken U(1) gauge symmetry that couples only to leptons and dark matter, explaining multiple experimental signals.

Findings

Explains PAMELA/ATIC cosmic ray excesses.

Accounts for DAMA annual modulation signal.

Consistent with current experimental constraints.

Abstract

We describe a simple model of Dark Matter, which explains the PAMELA/ATIC excesses while being consistent with all present constraints. The DAMA annual modulation signal can also be explained for some values of the parameters. The model consists of a Dark Sector containing a weakly coupled broken U(1) gauge symmetry, under which only the Dark Matter state and the leptons are charged.