CRESST is a leading direct detection sub-GeVc−2 dark matter experiment. During its second phase, cryogenic bolometers were used to detect nuclear recoils off the CaWO4 target crystal nuclei. The previously established electromagnetic background model relies on Secular Equilibrium (SE) assumptions. In this work, a validation of SE is attempted by comparing two likelihood-based normalisation results using a recently developed spectral template normalisation method based on Bayesian likelihood. Albeit we find deviations from SE in some cases we conclude that these deviations are artefacts of the fit and that the assumptions of SE is physically meaningful.

Angloher, G., Banik, S., Benato, G., Bento, A., Bertolini, A., Breier, R., et al. (2023). Secular Equilibrium Assessment in a CaWO4 Target Crystal from the Dark Matter Experiment CRESST using Bayesian Likelihood Normalisation. APPLIED RADIATION AND ISOTOPES, 194(April 2023) [10.1016/j.apradiso.2023.110670].

Secular Equilibrium Assessment in a CaWO4 Target Crystal from the Dark Matter Experiment CRESST using Bayesian Likelihood Normalisation

Canonica, L;Pattavina, L;
2023

Abstract

CRESST is a leading direct detection sub-GeVc−2 dark matter experiment. During its second phase, cryogenic bolometers were used to detect nuclear recoils off the CaWO4 target crystal nuclei. The previously established electromagnetic background model relies on Secular Equilibrium (SE) assumptions. In this work, a validation of SE is attempted by comparing two likelihood-based normalisation results using a recently developed spectral template normalisation method based on Bayesian likelihood. Albeit we find deviations from SE in some cases we conclude that these deviations are artefacts of the fit and that the assumptions of SE is physically meaningful.
Articolo in rivista - Articolo scientifico
Background model; Dark matter; Secular equilibrium;
English
21-gen-2023
2023
194
April 2023
110670
none
Angloher, G., Banik, S., Benato, G., Bento, A., Bertolini, A., Breier, R., et al. (2023). Secular Equilibrium Assessment in a CaWO4 Target Crystal from the Dark Matter Experiment CRESST using Bayesian Likelihood Normalisation. APPLIED RADIATION AND ISOTOPES, 194(April 2023) [10.1016/j.apradiso.2023.110670].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/457644
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