TL;DR
This paper updates the Herwig7 simulation tool to model light hadronic resonance production from dark matter annihilations in the MeV to GeV range, enabling better indirect detection studies of hidden dark matter sectors.
Contribution
The paper introduces an updated Herwig7 version that models hadronic final states from dark matter annihilation in the sub-GeV range, including error estimates.
Findings
Provides energy spectra for dark matter masses 250 MeV to 5 GeV.
Models complex light hadronic resonances from annihilation processes.
Enables new indirect detection analysis for hidden dark matter sectors.
Abstract
GeV-scale dark matter is an increasingly attractive target for direct detection, indirect detection, and collider searches. Especially for masses in the MeV to GeV range, indirect detection is expected to give a leading constraint. In that range, dark matter annihilations into hadronic final states produce a challenging zoo of light hadronic resonances. With an update of Herwig7, we provide a modeling of these processes and study energy spectra from annihilation through a vector mediator. We cover dark matter masses between 250 MeV and 5 GeV and include an error estimate. This opens up new opportunities for fully studying indirect detection signals for hidden dark matter sectors with vector mediators in the sub-GeV range.
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