# Multicomponent Dark Matter in the Light of CALET and DAMPE

## TL;DR

This paper evaluates multicomponent dark matter models in light of recent cosmic-ray and gamma-ray data, finding that only double-component models can simultaneously fit all observations within constraints.

## Contribution

It systematically tests single and double-component dark matter models against new cosmic-ray and gamma-ray data, highlighting the viability of double-component models under current constraints.

## Key findings

- Single and double-component models cannot fit AMS-02 and DAMPE data simultaneously.
- Double-component models can fit AMS-02 and CALET data together.
- Gamma-ray constraints restrict viable models to double-component dark matter.

## Abstract

In the light of the latest measurements on the total $e^+ + e^-$ flux by CALET and DAMPE experiments, we revisit the multicomponent leptonically decaying dark matter (DM) explanations to the cosmic-ray electron/positron excesses observed previously. Especially, we use the single and double-component DM models to explore the compatibility of the AMS-02 positron fraction with the new CALET or DAMPE data. It turns out that neither single nor double-component DM models are able to fit the AMS-02 positron fraction and DAMPE total $e^+ + e^-$ flux data simultaneously. On the other hand, for the combined AMS-02 and CALET dataset, both the single and double-component DM models can provide reasonable fits. If we further take into the diffuse $\gamma$-ray constraints from Fermi-LAT, only the double-component DM models are allowed.