https://doi.org/10.1140/epjp/s13360-024-04981-y
Regular Article
Background studies for the HOLMES experiment
1
Dipartimento di Fisica, University of Milano Bicocca, Piazza della scienza 3, 20126, Milan, Italy
2
Istituto Nazionale di Fisica Nucleare (INFN), sezione di Milano-Bicocca, Piazza della scienza 3, 20126, Milan, Italy
Received:
30
November
2023
Accepted:
6
February
2024
Published online:
24
February
2024
Determining the mass of neutrinos is one of the most compelling topics in particle physics. HOLMES, an experiment for a direct measurement of the neutrino mass, is addressing this subject through a calorimetric approach, exploiting arrays of Low-Temperature Transition-Edge Sensor Detectors (TESs) loaded with 
Ho. The experiment has entered its first phase in 2023, implanting approximately 1 Bq per pixel in an array of 64 detectors. In this work, I present the measurement made before this stage, in order to determine the expected background arising from natural radioactivity and cosmic rays. The significance of this background depends on the activity per pixel, which has yet to be defined based on the result of the first phase.
© The Author(s) 2024
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