Strong Constraints on Dark Photon and Scalar Dark Matter Decay from INTEGRAL and AMS-02

TL;DR

This paper uses data from INTEGRAL and AMS-02 to place stringent limits on the decay lifetimes of bosonic dark matter particles, including dark photons and scalar dark matter, across a broad mass range.

Contribution

It provides the first comprehensive constraints on dark photon and scalar dark matter decay lifetimes from gamma-ray and positron observations.

Findings

Dark matter decay lifetimes constrained up to 10^29 seconds.

Strong limits set for dark matter below 10 GeV and above 10 GeV.

Results significantly restrict dark matter decay models.

Abstract

We investigate the decay of bosonic dark matter with masses between 1 MeV and 2 TeV into Standard Model final states. We specifically focus on dark photons that kinetically mix with the Standard Model, as well as scalar dark matter models that have Yukawa couplings with the Standard Model. Using INTEGRAL and AMS-02 data, we constrain the dark matter decay lifetime into final states that include photons or positrons, setting strong constraints on the dark matter lifetime that reach 10$^{25}$ s for dark matter below 10 GeV and up to 10$^{29}$ s for dark matter above 10 GeV.