http://arxiv.org/abs/2212.04215
Using data collected at the Pierre Auger Observatory, we search for signatures of instanton-induced processes that would provide evidence of super-heavy particles decaying in the Galactic halo. Such particles could have been produced sufficiently during the post-inflationary epoch to match the relic abundance of dark matter inferred today. The non-observation of these signatures allows us to probe the instanton strength and to derive a bound, the best ever obtained from instanton-mediated processes, on the reduced coupling constant of gauge interactions in the dark sector: $\alpha_X \lesssim 0.09$, for $10^{9} \lesssim M_X/{\rm GeV} < 10^{19}$.
Olivier Deligny
Fri, 9 Dec 22
16/75
Comments: Proceedings of the 27th European Cosmic Ray Symposium – ECRS 2022 – 25-29 July 2022 – Nijmegen, the Netherlands
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