Würzburg 2018 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 68: Neutrinophysik III

T 68.3: Vortrag

Mittwoch, 21. März 2018, 17:00–17:15, Z6 - SR 2.012

Background study for an updated geoneutrino analysis with Borexino — •Dong Han, Sindhujha Kumaran, and Livia Ludhova for the Borexino collaboration — IKP-2 Forschungszentrum Jülich

Geoneutrinos are electron antineutrinos produced from natural radioactive decays within the Earth, which can provide direct information from the inside of our planet. Detailed study of geoneutrinos will help us to set further constraints to the current Earth models.

Borexino detector is located in Laboratori Nazionali del Gran Sasso underground laboratory in Italy, at a depth of 3800 meters water equivalent. Far distance from nuclear reactors, as well as a high level of radiopurity of liquid scintillator, makes Borexino an excellent geoneutrino observatory. Borexino has observed geoneutrino signal with more than 5 sigma confidence level in 2015. Thanks to improved selection criteria of inverse beta decay events in the whole data set from 2007, we expect an important increase in the total statistics.

This talk will concentrate on the investigation of backgrounds, which needs to be reevaluated after the changes in the analysis approach.