Data-driven background model for the CUORE experiment
Copyright policy )Data-driven background model for the CUORE experiment
We present the model we developed to reconstruct the CUORE radioactive background based on the analysis of an experimental exposure of 1038.4 kg yr. The data reconstruction relies on a simultaneous Bayesian fit applied to energy spectra over a broad energy range. The high granularity of the CUORE detector, together with the large exposure and extended stable operations, allow for an in-depth exploration of both spatial and time dependence of backgrounds. We achieve high sensitivity to both bulk and surface activities of the materials of the setup, detecting levels as low as 10 nBq kg$^{-1}$ and 0.1 nBq cm$^{-2}$, respectively. We compare the contamination levels we extract from the background model with prior radio-assay data, which informs future background risk mitigation strategies. The results of this background model play a crucial role in constructing the background budget for the CUPID experiment as it will exploit the same CUORE infrastructure.
- Sapienza University of Rome Italy
- Shanghai Jiao Tong University China (People's Republic of)
- Fudan University China (People's Republic of)
- Johns Hopkins University United States
- Alma Mater Studiorum University of Bologna Italy
Physics - Instrumentation and Detectors, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], energy spectrum, 610, FOS: Physical sciences, background, model, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 530, Bayesian, Neutrino Masses; Bolometer; Half-Life, NSD-Neutrinos, background, time dependence, surface, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Nuclear Experiment (nucl-ex), Nuclear Experiment, Instrumentation and Methods for Astrophysics (astro-ph.IM), Cancer, bolometers; background model; Majorana neutrino, CUORE, model, background, Instrumentation and Detectors (physics.ins-det), stability, Nuclear and Plasma Physics, sensitivity, Nuclear Experiment; Nuclear Experiment; astro-ph.IM; Physics - Instrumentation and Detectors, background, radioactivity, [PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], radioactivity, Physical Sciences, time dependence, Astrophysics - Instrumentation and Methods for Astrophysics
Physics - Instrumentation and Detectors, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], energy spectrum, 610, FOS: Physical sciences, background, model, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 530, Bayesian, Neutrino Masses; Bolometer; Half-Life, NSD-Neutrinos, background, time dependence, surface, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Nuclear Experiment (nucl-ex), Nuclear Experiment, Instrumentation and Methods for Astrophysics (astro-ph.IM), Cancer, bolometers; background model; Majorana neutrino, CUORE, model, background, Instrumentation and Detectors (physics.ins-det), stability, Nuclear and Plasma Physics, sensitivity, Nuclear Experiment; Nuclear Experiment; astro-ph.IM; Physics - Instrumentation and Detectors, background, radioactivity, [PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], radioactivity, Physical Sciences, time dependence, Astrophysics - Instrumentation and Methods for Astrophysics