Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 42: Neutrino astronomy 2

T 42.4: Talk

Tuesday, March 5, 2024, 16:45–17:00, Geb. 30.23: 6/1

Prompt neutrino flux with atmospheric neutrinos in IceCube — •Lars Bollmann, Mirco Hünnefeld, and Pascal Gutjahr for the IceCube collaboration — TU Dortmund University, AG Rhode, Dortmund, Germany

One of the main goals of the IceCube neutrino detector, located at the geographic South Pole, is the identification and characterization of the high-energy astrophysical neutrino flux. However, the majority of neutrinos detected by IceCube are atmospheric neutrinos from cosmic ray interactions in the atmosphere. The atmospheric neutrino flux consists of two components: conventional neutrinos from pion and kaon decays, and prompt neutrinos from the decay of charmed or heavier mesons. The precise shape of the prompt neutrino flux is not yet fully understood. A better understanding of this flux could improve measurements of astrophysical neutrinos, as prompt atmospheric neutrinos are their main background at high energies. By looking only for neutrino events with coinciding muons from the same air shower a purely atmospheric neutrino sample can be created. The removed astrophysical component allows for a better characterization of the prompt atmospheric neutrino flux. In this talk first steps toward a measurement of the prompt atmospheric neutrino flux using this approach will be presented.