Aachen 2019 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 95: Neutrinos: Myon-Rekonstruktion

T 95.4: Vortrag

Donnerstag, 28. März 2019, 16:50–17:05, H11

A new muon tracking for the Borexino experiment — •Michael Nieslony, Johann Martyn, Vsevolod Orekhov, and Michael Wurm for the Borexino collaboration — Johannes Gutenberg-Universität Mainz

The Borexino experiment is a liquid scintillator detector located at the Laboratori Nazionali del Gran Sasso (LNGS) in Italy with the primary aim of detecting solar neutrinos. The experiment’s exceptional radiopurity levels enabled the spectral measurement of almost the whole pp-fusion-cycle of the sun, including ⁷Be-, pp-, and pep-neutrinos. Besides the solar program, a multitude of analyses ranging from the detection of geoneutrinos up to setting the most stringent limit on the lifetime of the electron have been performed.

The rejection of background events is a vital factor for the ongoing success of the experiment. One of the major background sources are cosmic muons, which produce unstable nuclei like ¹¹C along their way through the detector through spallation processes. To efficiently reject those events, a precise knowledge of the muon track is necessary. A new muon tracking based on the first hit times of the emitted Cherenkov and scintillation photons was developed and is presented in this talk. The work was supported by funds of the Deutsche Forschungsgemeinschaft (DFG)