Würzburg 2018 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 68: Neutrinophysik III

T 68.9: Vortrag

Mittwoch, 21. März 2018, 18:30–18:45, Z6 - SR 2.012

Gamma biasing in the Borexino/SOX framework — •Michael Gschwender — University of Tübingen

The Short distance neutrino Oscillations with BoreXino (SOX) experiment aims to search for sterile neutrinos in the eV-scale. SOX is searching for the disappearance of antineutrinos from a radioactive source (¹⁴⁴Ce - ¹⁴⁴Pr).
In order to achieve a higher sensitivity, SOX aims to use the whole Borexino inner vessel scintillator, in contrast to previous analysis of solar neutrinos where a smaller fiducial volume was used. This introduces in turn more background contributions to the sensitive volume.
A source of background originates from gammas coming from outside the buffer liquid of Borexino. In order to simulate these gammas in a reasonable timeframe within the Borexino simulation framework, a biasing approach has been implemented. By dividing the Borexino detector geometry into multiple slices and making use of techniques such as geometrical importance sampling, and weight roulett this can be done in a feastable way. This talk presents the implemented techniques used by this approach as well as some simulation results.
This work is funded by the Deutsche Forschungsgemeinschaft.