Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 53: Neutrino Astronomy III

T 53.8: Vortrag

Mittwoch, 2. April 2025, 18:00–18:15, VG 1.105

Detecting Distant Supernovae Using Log-Likelihood Ratios — •Kashish Gupta, Thilo Birkenfeld, and Achim Stahl — Lehrstuhl für Experimentalphysik III B

The Jiangmen Underground Neutrino Observatory (JUNO) offers a robust platform for observing Core-Collapse Supernovae through neutrino emissions. In this study, the inverse beta decay (IBD) is used for Supernova search, where an electron antineutrino interacts with a proton, producing a positron and a neutron signal. The IBD channel's high cross-section and distinct event signature are particularly beneficial for detecting distant supernovae. A likelihood ratio test is applied to identify IBD events caused by a Supernova from background events dominated by reactor antineutrinos. In the first method, events are considered only within a time window corresponding to the CC-SNe duration, achieving a false alert rate (FAR) of 0.4/year for 2 IBD events and near-zero FAR for 3 IBD events.

A second method that treats arbitrary numbers of events on an equal footing is presented to improve sensitivity further.

Keywords: Supernova; Log-likelihood; neutrino emissions; Supernovae Detection; Large Distances