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T: Fachverband Teilchenphysik

T 29: Cosmic rays I

T 29.5: Vortrag

Dienstag, 31. März 2020, 18:00–18:15, H-HS XII

High Energy Antiproton Analysis with the AMS-02 Experiment — •Sichen Li — RWTH I. Physikalisches Institut B

The Alpha Magnetic Spectrometer (AMS-02) is a high precision cosmic rays detector installed on the International Space Station in May 2011. It has collected more than 145 billion events until now. Surprisingly, the ratio of antiprotons to protons appears to be energy independent above 60 GeV.

The most important background in the high energy range consists in protons with mis-reconstructed charge sign. In this analysis, we train a deep neural network based on Monte Carlo simulation, using the Keras framework, to separate antiprotons from charge-confused protons. With this method, we have a good potential to extend the energy range for the antiproton to proton flux ratio, which will help us clarify the origin of antiprotons.