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The determination of the absolute scale of the neutrino masses is one of the most challenging questions in particle physics. Different approaches are followed to achieve a sensitivity on neutrino masses in the sub-eV range. Among them,…

The determination of the absolute scale of the neutrino masses is one of the most challenging present questions in particle physics. The most stringent limit, $m(\bar{\nu}_{\mathrm{e}})<2$eV, was achieved for the electron anti-neutrino mass…

Thanks to oscillation experiments it is now an established fact that neutrinos are massive particles. Yet, the assessment of neutrinos absolute mass scale is still an outstanding challenge in particle physics and cosmology as oscillation…

Instrumentation and Detectors · Physics 2017-06-28 Andrea Giachero

We have investigated the possibility of measuring the electron neutrino mass with sub-eV sensitivity by studying the electron capture decay of 163-Ho with cryogenic microcalorimeters. In this paper we will introduce an experiment's concept,…

Instrumentation and Detectors · Physics 2012-08-03 Massimiliano Galeazzi , Flavio Gatti , Maurizio Lusignoli , Angelo Nucciotti , Stefano Ragazzi , Maria Ribeiro Gomes

Recent years have witnessed many exciting breakthroughs in neutrino physics. The detection of neutrino oscillations has proved that neutrinos are massive particles but the assessment of their absolute mass scale is still an outstanding…

High Energy Physics - Phenomenology · Physics 2016-06-07 Angelo Nucciotti

While the mass differences between neutrino mass states are known, their absolute masses and mass hierarchy have not yet been determined. Determining the mass of neutrinos provides access to physics beyond the Standard Model and the…

The determination of the absolute neutrino mass scale remains a fundamental open question in particle physics, with profound implications for both the Standard Model and cosmology. Direct kinematic measurements, independent of…

Three decades ago, the measurement of the electron neutrino mass in atomic electron capture (EC) experiments was scrutinized in its two variants: single EC and neutrino-less double EC. For certain isotopes an atomic resonance enormously…

High Energy Physics - Phenomenology · Physics 2013-05-22 A. De Rújula

The assessment of neutrino absolute mass scale is still a crucial challenge in today particle physics and cosmology. Beta or electron capture spectrum end-point study is currently the only experimental method which can provide a model…

The international project ``Microcalorimeter Arrays for a Rhenium Experiment'' (MARE) aims at the direct and calorimetric measurement of the electron neutrino mass with sub-electronvolt sensitivity. Calorimetric neutrino mass experiments…

High Energy Physics - Experiment · Physics 2019-08-13 A. Nucciotti

Large calorimetric neutrino mass experiments using thermal detectors are possibly going to play a crucial role in the challenge for assessing the neutrino mass. This paper describe a tool based on Monte Carlo methods which has been…

Instrumentation and Detectors · Physics 2014-12-18 A. Nucciotti

The electron-neutrino mass (or masses and mixing angles) may be directly measurable in weak electron-capture decays. The favoured experimental technique is "calorimetric". The optimal nuclide is $^{163}$Ho, and several experiments (ECHo,…

High Energy Physics - Phenomenology · Physics 2016-05-25 A. De Rújula , M. Lusignoli

The European Research Council has recently funded HOLMES, a new experiment to directly measure the neutrino mass. HOLMES will perform a calorimetric measurement of the energy released in the decay of 163Ho. The calorimetric measurement…

The goal of the ECHo experiment is a direct determination of the absolute scale of the neutrino mass by the analysis of the end-point region of the Ho-163 electron capture (EC) spectrum. The results of the first phase of the experiment,…

Instrumentation and Detectors · Physics 2023-08-16 Federica Mantegazzini , Neven Kovac , Christian Enss , Andreas Fleischmann , Markus Griedel , Loredana Gastaldo

It is in principle possible to measure directly the electron neutrino mass (or masses and mixing angles) in weak electron-capture decays. The optimal nuclide in this respect is $^{163}$Ho. The favoured experimental technique, currently…

High Energy Physics - Phenomenology · Physics 2015-11-10 A. De Rújula , M. Lusignoli

The HOLMES experiment will perform a precise calorimetric measurement of the end point of the Electron Capture (EC) decay spectrum of 163Ho in order to extract information on neutrino mass with a sensitivity below 2 eV. In its final…

A joint effort of cryogenic microcalorimetry (CM) and high-precision Penning-trap mass spectrometry (PT-MS) in investigating atomic orbital electron capture (EC) can shed light on the possible existence of heavy sterile neutrinos with…

High Energy Physics - Phenomenology · Physics 2015-06-18 P. E. Filianin , K. Blaum , S. A. Eliseev , L. Gastaldo , Yu. N. Novikov , V. M. Shabaev , I. I. Tupitsyn , J. Vergados

Calorimetric decay energy spectroscopy of electron-capture-decaying isotopes is a promising method to achieve the sensitivity required for electron neutrino mass measurement. The very low total nuclear decay energy (QEC < 3 keV) and short…

HOLMES is a new experiment aiming at directly measuring the neutrino mass with a sensitivity below 2 eV. HOLMES will perform a calorimetric measurement of the energy released in the decay of $^{163}$Ho. The calorimetric measurement…

The analysis of the endpoint region of the calorimetrically measured $^{163}$Ho electron capture spectrum is a very promising way to determine the mass of the electron neutrino. The achievable sensitivity of $^{163}$Ho-based experiments and…

Instrumentation and Detectors · Physics 2014-09-15 Loredana Gastaldo
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