In the Standard Model ofelectroweak interactions an important input parameter is still missing: the absolute value of the mass ofone ofthe neutrinos. In this paper we report the final results ofthe Milano electron anti-neutrino mass experiment after having measured for about one year the beta spectrum of 187Re with 10 AgReO4 microcalorimeters. We describe the experimental set-up, the detector performance and the measuring conditions. We present the updated limit on the electron anti-neutrino mass which is the most stringent so far obtained with thermal detectors. We also give the most precise estimates for the 187Re transition energy and lifetime.
Sisti, M., Arnaboldi, C., Brofferio, C., Ceruti, G., Cremonesi, O., Fiorini, E., et al. (2004). New limits from the Milano neutrino mass experiment with thermal microcalorimeters. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT, 520(1-3), 125-131 [10.1016/j.nima.2003.11.273].
New limits from the Milano neutrino mass experiment with thermal microcalorimeters
SISTI, MONICA;ARNABOLDI, CLAUDIO;BROFFERIO, CHIARA;Cremonesi, O;FIORINI, ETTORE;NUCCIOTTI, ANGELO ENRICO LODOVICO;PAVAN, MAURA;Pessina, G;Previtali, E;
2004
Abstract
In the Standard Model ofelectroweak interactions an important input parameter is still missing: the absolute value of the mass ofone ofthe neutrinos. In this paper we report the final results ofthe Milano electron anti-neutrino mass experiment after having measured for about one year the beta spectrum of 187Re with 10 AgReO4 microcalorimeters. We describe the experimental set-up, the detector performance and the measuring conditions. We present the updated limit on the electron anti-neutrino mass which is the most stringent so far obtained with thermal detectors. We also give the most precise estimates for the 187Re transition energy and lifetime.
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