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Updated: Aug 12, 2025
08:55
Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
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Secular equilibrium assessment in a CaWO4 target crystal from the dark matter experiment CRESST using Bayesian
G Angloher1, S Banik2, G Benato3
1Max-Planck-Institut für Physik, D-80805, München, Germany.
Summary
This study validates the Secular Equilibrium (SE) assumption for the CRESST dark matter experiment. Despite observed deviations, the findings confirm SE
Area of Science:
- Particle Physics
- Cosmology
- Astrophysics
Background:
- The CRESST experiment searches for sub-GeV dark matter using cryogenic bolometers.
- Electromagnetic background modeling in CRESST phase II relies on Secular Equilibrium (SE) assumptions.
- Validating SE is crucial for accurate dark matter detection.
Purpose of the Study:
- To validate the Secular Equilibrium (SE) assumption for the electromagnetic background model in the CRESST experiment.
- To compare normalization results using a novel Bayesian likelihood-based spectral template method.
Main Methods:
- Utilized a recently developed spectral template normalization method.
- Employed Bayesian likelihood analysis to compare normalization results.
- Focused on nuclear recoils detected by cryogenic bolometers using CaWO4 targets.
Main Results:
- Deviations from Secular Equilibrium (SE) were observed in some instances.
- These deviations were identified as fitting artifacts rather than physical phenomena.
- The underlying assumptions of SE were found to be physically meaningful.
Conclusions:
- The Secular Equilibrium (SE) assumption is physically valid for the CRESST experiment's background model.
- The developed Bayesian spectral template method provides a robust validation approach.
- Further refinement of fitting procedures can resolve observed deviations.
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