Mainz 2014 – scientific programme

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T: Fachverband Teilchenphysik

T 40: Niederenergie-Neutrinophysik 2

T 40.4: Talk

Monday, March 24, 2014, 17:40–17:55, P106

Application of the Backtracking-Algorithm to muons in Borexino — •Dominikus Hellgartner, German Beischler, Timo Lewke, Randolph Möllenberg, Lothar Oberauer, Patrick Pfahler, Tobias Stempfle, Marc Tippmann, Jürgen Winter, and Vincenz Zimmer — for the LAGUNA-LENA working group — Technische Universität München, Physik Department E15, James Franck Straße, 85748 Garching

The backtracking algorithm was originally developed to reconstruct contained high energy neutrino events in the planned next-generation liquid-scintillator neutrino detector LENA. Simulations showed promising results for this detector.

To ensure that the algorithm also works on real data, it was applied to through-going cosmic muons in the Borexino detector. The angular resolution of the algorithm was found to be (1.62±0.8)^∘, which is superior to the established tracking algorithms in Borexino. The lateral resolution is about 40 cm and therefore comparable with the existing tracking algorithms.

Furthermore, the backtracking algorithm can be extended to cover more complicated event types, which cannot be handled by the existing tracking algorithms. Examples for these events include muons which are stopped in the detector or two simultaneous muons.

This work was supported by the Maier-Leibniz-Laboratorium and by the DFG cluster of excellence ’Origin and Structure of the Universe’.