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T: Fachverband Teilchenphysik

T 103: Neutrino Physics without Accelerators 8

T 103.7: Talk

Thursday, March 24, 2022, 17:45–18:00, T-H35

Modelling Seasonal Variations of Atmospheric Muon Neutrinos using MCEq — •Jakob Böttcher, Hannah Erpenbeck, Philipp Fürst, and Christopher Wiebusch for the IceCube collaboration — RWTH Aachen, III. Physikalisches Institut b

The IceCube Neutrino Observatory measures the flux of atmospheric muon neutrinos with unprecedented statistics. These muon neutrinos are produced in cosmic-ray air-showers in the atmosphere, and their flux depends on meteorological quantities such as air temperature and density. The analysis of the resulting seasonal variations improves the understanding of the production of atmospheric neutrinos and provides a novel method for testing hadronic interaction models for air-showers. This talk compares the results of analysing four years of IceCube neutrino data to predictions using the numeric cascade equation solver MCEq. The predictions are based on detailed daily calculations of the atmospheric neutrino flux. These use latitude and longitude dependent vertical temperature profiles of the atmosphere as provided by the AIRS instrument on NASA's Aqua satellite.