Phenomenology of $U(1)_{L_\mu - L_\tau}$ charged dark matter at PAMELA/FERMI and colliders

TL;DR

This paper explores a $U(1)_{L_- au}$ gauge extension of the Standard Model with a new dark matter candidate, analyzing cosmic ray signals, relic density, muon $(g-2)$, and collider signatures.

Contribution

It introduces a leptophilic dark matter model with a $U(1)_{L_- au}$ gauge symmetry, studying its phenomenology and collider prospects.

Findings

Dark matter annihilation explains cosmic ray excesses.

Collider production cross sections can reach up to 10^3 fb.

Model accommodates muon $(g-2)$ anomaly.

Abstract

Recent data on $e^+/e^-$ and $\bar{p}$ cosmic rays suggest that dark matter annihilate into the standard model (SM) particles through new leptophilic interaction. In this paper, we consider a standard model extension with the gauged $U(1)_{L_\mu - L_\tau}$ group, with a new Dirac fermion charged under this U(1) as a dark matter. We study the muon $(g-2)_\mu$, thermal relic density of the cold dark matter, and the collider signatures of this model. $Z^{'}$ productions at the Tevatron or the LHC could be easily order of $O(1)-O(10^3)$ fb.