Indirect detection imprint of leptophilic dark matter

TL;DR

This paper analyzes constraints on leptophilic dark matter from indirect detection experiments, classifying interactions and updating limits based on recent data, with significant implications for tau-flavored dark matter viability.

Contribution

It systematically classifies effective interactions of leptophilic dark matter and updates constraints using latest experimental data, highlighting the near exclusion of tau-flavored DM.

Findings

Tau-flavored dark matter is nearly excluded by current indirect detection constraints.

Constraints on scalar, Dirac, and vector interactions vary across different experiments.

The study provides a comprehensive summary of viable parameter space for leptophilic dark matter.

Abstract

In this paper we revisit constraints on the leptophilic dark matter (DM) arising from the DM indirect detection experiments. Interactions between the charged leptons and the scalar-type, Dirac-type or vector-type DM are written in terms of effective operators. After classifying all interactions that may give non-zero signals in indirect detections, we study constraints on the parameter space of these effective interactions from the latest results of AMS-02, Planck, Fermi-LAT and H.E.S.S., as well as the observed relic abundance. Main results are summarized in the Table. I. It shows that the $\tau$-flavored DM is almost excluded by the DM indirect detection results in some scenario.