Bonn 2020 – scientific programme
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T: Fachverband Teilchenphysik
T 7: Neutrino physics without accelerators II
T 7.4: Talk
Monday, March 30, 2020, 17:20–17:35, H-HS V
Towards a Measurement of the CNO cycle in the Sun with Borexino — •Ömer Penek1,2, Zara Bagdasarian1, Alexandre Goettel1,2, Sindhujha Kumaran1,2, Livia Ludhova1,2, Mariia Redchuk1,2, Giulio Settanta1, and Apeksha Singhal1,2 for the Borexino collaboration — 1Institut für Kernphysik, Forschungszentrum Jülich — 2III. Physikalisches Institut B, RWTH Aachen University
The Borexino detector, located at the Laboratori Nazionali del Gran Sasso in Italy, is a liquid scintillator detector with a primary goal to measure solar neutrinos. The pp fusion chain has been measured in Borexino with an outstanding precision through the detection of pp, pep, 7Be, and 8B neutrinos. It is well motivated by standard solar models that less than 1% of the solar energy is fueled by the so-called Carbon-Nitrogen-Oxygen (CNO) cycle which is assumed to be the main energy production mechanism in heavier stars. However, a direct measurement of solar neutrinos from the CNO cycle is difficult due to the high correlation with the 210Bi isotope present in the liquid scintillator. In the so-called Borexino Phase 3, namely the data-taking period after July 2016, the upper limit on the 210Bi rate can be inferred through the α-decay of its decay daughter 210Po. In this talk the Borexino strategy towards the first observation of the CNO neutrinos will be presented. This group report is presented in the name of the Borexino Collaboration.