Aachen 2019 – scientific programme

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T: Fachverband Teilchenphysik

T 78: Suche nach Neuen Teilchen IV

T 78.7: Talk

Thursday, March 28, 2019, 17:35–17:50, H07

Search for low relativistic magnetic monopoles utilizing luminescence light with IceCube* — •Frederik Lauber for the IceCube collaboration — Bergische Universität Wuppertal, Gaußstraße 20, 42117 Wuppertal

Magnetic monopoles are hypothetical particles predicted by many Beyond the Standard Model theories. They are carriers of single elementary magnetic charge. This work considers intermediate mass monopoles which have been created shortly after the Big Bang.

While there have been current results in the mild and high relativistic regime (0.5 c − 1 c), there is no recent search in the low relativistic range (0.1 c − 0.5 c). This is due to the predominant usage of Cherenkov light as a detection mechanism and the usage of detection media with a Cherenkov threshold above the aforementioned velocity range in current experiments. However, utilizing luminescence light produced by highly ionizing particles such as magnetic monopoles in water and ice, the low relativistic range becomes measurable for current water and ice based neutrino detectors. This has been demonstrated in simulation for IceCube and conservative luminescence light yield.

The current status on the ongoing search in the low relativistic range, utilizing luminescence light as a detection method with IceCube for the first time, is presented. Signal simulation is compared to data and background simulation on different cut levels. Signal and background are separated with a machine learning approach including neural networks and boosted decision trees. * Gefördert durch die BMBF-Verbundforschung Astroteilchenphysik