Resonant Annihilation of WIMP Dark Matter for Halo Gamma Ray Signal

Hitoshi Murayama

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arXiv · 2512.01404

Resonant Annihilation of WIMP Dark Matter for Halo Gamma Ray Signal

Hitoshi Murayama

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Abstract

We propose a resonant annihilation as a way to reconcile the WIMP annihilation cross sections in a recently reported gamma ray signal from the Milky Way halo with that for the freeze-out and the upper limit from dwarf galaxies. We perform a simple model-independent analysis based on this hypothesis and determine the required parameters. We also present a simple particle-physics model that can accommodate them.

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Hitoshi Murayama. 2025-12-01. Resonant Annihilation of WIMP Dark Matter for Halo Gamma Ray Signal. https://arxiv.org/abs/2512.01404

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