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T: Fachverband Teilchenphysik

T 29: Detectors III (Scintillators)

T 29.5: Vortrag

Dienstag, 1. April 2025, 17:15–17:30, VG 1.102

Quenching Studies to Increase JUNO’s Sensitivity to Proton Decay — •Ulrike Fahrendholz, Lothar Oberauer, Matthias Raphael Stock, Selina Rudolph, and Hans Steiger — TUM School of Natural Sciences, Physics Department, James-Franck-Str. 1, 85748 Garching

The hypothetical proton decay p → K⁺ + ν generates a distinctive threefold coincidence signal in the Jiangmen Underground Neutrino Observatory (JUNO). JUNO features 20 kton of liquid scintillator, which requires precise characterization of its scintillation response to achieve the high sensitivity necessary for proton decay searches.

This talk presents the results of quenching studies on protons at kinetic energies of the order of 100 MeV. Additionally, measurements of ¹²C will be discussed, offering insights also relevant for the interpretation of supernova neutrino events.

From the proton quenching, the light emission behavior of kaons is extrapolated. These results can be used to increase the event selection efficiency for p→ K⁺ν in JUNO.

This work is supported by the Clusters of Excellence Origins and PRISMA⁺ and the DFG Collaborative Research Center "NDM" (SFB1258).

Keywords: Proton decay; JUNO; Quenching; Liquid scintillator