Electron flavored dark matter

Wei Chao,Huai-Ke Guo,Hao-Lin Li,Jing Shu

doi:10.1016/j.physletb.2018.05.075

Abstract

In this paper we investigate the phenomenology of the electron flavored Dirac dark matter with two types of portal interactions. We analyze constraints from the electron magnetic moment anomaly, LHC searches of singly charged scalar, dark matter relic abundance as well as direct and indirect detections. Our study shows that the available parameter space is quite constrained, but there are parameter space that is compatible with the current data. We further show that the DAMPE cosmic ray electron excess, which indicates cosmic ray excess at around 1.5 TeV, can be interpreted as the annihilation of dark matter into electron positron pairs in this model.

Highlights

About 80% of the mater in our Universe is made of dark matter (DM)
Among many different DM scenarios, Weakly Interacting Massive Particle (WIMP) remains to be an interesting candidate since it has a strong connection with physics beyond Standard Model at the TeV scale and can be probed through both direct and indirect detections
It is clear that this “DAMPE Favored” region overlaps the relic density contour at κ1 ≈ 1.5 for model I and κ2 ≈ 1.7 for model II, both of which are allowed by other indirect detection and direct detection constraints

Summary

INTRODUCTION

About 80% of the mater in our Universe is made of dark matter (DM). Among many different DM scenarios, Weakly Interacting Massive Particle (WIMP) remains to be an interesting candidate since it has a strong connection with physics beyond Standard Model at the TeV scale and can be probed through both direct and indirect detections. See Refs [5,6,7,8,9,10,11,12,13,14,15,16,17,18] for detail This experiment has several good features in terms of probing the electron positron cosmic ray spectrum. While there has been various studies of dark matter annihilating or decaying into leptons, here we consider a novel class of dark matter which we call “electron flavored dark matter” In this case, the dark matter carries the electron number and annihilate into electron pairs through the t-channel mediator which could result a possible sharp structure in the electron positron cosmic ray spectrum. We replace me by 50MeV in the numerical calculation

CONSTRAINTS

RELIC DENSITY AND DIRECT DETECTION

INDIRECT DETECTIONS

SUMMARY

Ωh2 Excluded