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Self-interacting dark matter and the GRB221009A event
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In this work, we explore the intriguing possibility of connecting self-interacting dark matter (SIDM) with the recently observed exceptionally bright and long-duration Gamma Ray Burst (GRB221009A). The proposed minimal scenario involves a light scalar mediator, simultaneously enabling dark matter (DM) self-interaction and explaining the observed very high energy (VHE) photons from GRB221009A reported by LHAASO's data. The scalar's mixing with the standard model (SM) Higgs boson allows for its production at the GRB site, which will then propagate escaping attenuation by the extra-galactic background light (EBL). These scalars, if highly boosted, have the potential to explain LHAASO's data. Moreover, the same mixing also facilitates DM-nucleon or DM-electron scatterings at terrestrial detectors, linking SIDM phenomenology to the GRB221009A events. This manuscript presents the parameter space meeting all constraints and offers an exciting opportunity to explore SIDM in future direct search experiments using insights from the GRB observation.
Forward citations
Cited by 2 Pith papers
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Dark Phoenix: dark matter relic from its own decay
A transient post-freeze-out decay window for dark matter, closed by a first-order phase transition that jumps a partner mass, can reduce an overproduced thermal relic to the observed abundance.
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Self-interacting dark matter with observable $\Delta N_{\rm eff}$
This paper constructs a GeV-scale self-interacting dark matter model with late scalar decays that simultaneously sets the relic abundance and yields an observable Delta Neff in reach of CMB-S4.
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