Abstract
AbstractDetermining 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 $$^{163}$$
163
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.
Funder
FP7 Ideas: European Research Council
Università degli Studi di Milano - Bicocca
Publisher
Springer Science and Business Media LLC
Reference20 articles.
1. K. Zuber, Neutrino physics (Taylor & Francis, Milton Park, 2003)
2. A. Osipowicz, H. Blümer, G. Drexlin, Katrin-a next generation tritium beta decay experiment with sub-ev sensitivity for the electron neutrino mass. Technical report, Forschungszentrum Karlsruhe GmbH Technik und Umwelt (Germany). Inst. fuer ..., (2001)
3. J.A. Formaggio Project, 8 Collaboration, et al., Project 8: using adio-frequency techniques to measure neutrino mass. Nucl. Phys. B-Proceed. Suppl. 229, 371–375 (2012)
4. L. Gastaldo, Klaus Blaum, Andreas Dörr, Ch. E. Düllmann, E. Eberhardt, Sergey Eliseev, C. Enss, Amand Faessler, A. Fleischmann, S. Kempf et al., The electron capture 163 ho experiment echo. J. Low Temp. Phys. 176(5), 876–884 (2014)
5. Direct neutrino-mass measurement with sub-electronvolt sensitivity, Nature Phys. 18(2), 160–166 (2022)