IFIC Seminar: Status of indirect dark matter searches with anti-nuclei

por Pedro De La Torre Luque (Stockholm University and The Oskar Klein Centre for Cosmoparticle Physics)

martes 7 jun. 2022 12:00 → 13:00 Europe/Madrid

1001-Primera-135 - Nave Exp. Sala de Audiovisuales (IFIC)

The creation of anti-nuclei in the Galaxy has been has been discussed as a possible signal of exotic production mechanisms such as primordial black hole evaporation or dark matter decay/annihilation. Recent CR antiproton studies have claimed the possibility of an excess of data over the predicted flux at around 10-20 GeV, which can be the signature of dark matter annihilating into antiprotons. Nevertheless, this excess is subject to many uncertainties related to the evaluation of the antiproton spectrum produced from spallation interactions of CRs. Likewise, anti-nuclei present a very powerful smoking gun to reveal the nature of dark matter and, excitingly, other astrophysical excesses that have been correlated with dark matter (e.g., GCE, DAMA, etc.), predict an anti-nucleus flux that is within the sensitivity range reached by detectors such as AMS-02 and GAPS in the coming years. 

In this talk, we discuss that the antiproton excess is likely due to our limited knowledge of the propagation of charged particles in the Galaxy and show how the antiproton spectrum can be easily reproduced without the need of dark matter. We also show the anti-nuclei production expected from global analysis of CRs involving antiprotons considering dark matter and compare those predictions with the sensitivity expected from CR experiments in the next years.