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PM2024 - 16th Pisa Meeting on Advanced Detectors

26 May 2024 to 1 June 2024
La Biodola - Isola d'Elba (Italy)
Europe/Rome timezone

Pisa Meeting Organization

First measurements of the HOLMES neutrino mass experiment

30 May 2024, 08:31
2h 49m
Sala Elena

Sala Elena
Poster T1 - Detector Techniques for Cosmology and Astroparticle Physics Detector Techniques for Cosmology and Astroparticle Physics - Poster session

Speaker

Luca Origo (Università di Milano Bicocca / INFN)

Description

Concerning particle physics and cosmology, the neutrino mass measurement will shed light on several important open issues. Neutrino mass information can be extrapolated from a beta-decay spectrum analysis. Not relying on any theoretical hypothesis but energy-momentum conservation, this is known as direct measurement. In this field, the state-of-the-art is represented by the KATRIN spectrometer which will improve its sensitivity at most to O(0.2 eV).

An alternative for future research is the calorimetric approach. By embedding the beta source inside the detector the decay products are fully contained and several systematic effects are avoided. The HOLMES experiment will prove the feasibility of this approach by ion-implanting a source of 163Ho in Transition Edge Sensors (TESs). These microcalorimeters ensure high energy and time resolutions. They also allow a distribution of the total activity over a large number of pixels that we read out using the μ-wave multiplexing technique. 163Ho electron capture (EC) was proposed for direct neutrino mass determination because of its low Q-value (∼2.83 keV) that increases the fraction of useful events in the region close to the spectrum end-point.

An array of 64 TESs has already been measured. The EC spectrum reconstruction will be performed with a robust set of data filtering routines while its endpoint region will be analyzed with Bayesian-based algorithms. Once the first 163Ho low-dose implantation was accomplished, a preliminary measurement with a pixel activity of O(1 Bq) began in late 2023. Using an external source, the experiment calibrated the 163Ho spectral features. By increasing the amount of collected data during 2024, HOLMES will assess an initial upper limit on mν of about ∼ 30 eV. In my contribution, I will summarize the results obtained so far from the HOLMES first measurements.

Collaboration HOLMES collaboration
Role of Submitter I am the presenter

Primary author

Luca Origo (Università di Milano Bicocca / INFN)

Co-authors

Adriano Bevilacqua (Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Genova, Genova, Italy) Andrea Giachero (Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Milano-Bicocca, Milano, Italy) Angelo Nucciotti (Dipartimento di Fisica, Universit`a di Milano-Bicocca, Milano, Italy) Bradley Alpert (National Institute of Standards and Technology (NIST), Boulder, Colorado, USA) Carl Reintsema (National Institute of Standards and Technology (NIST), Boulder, Colorado, USA) Dan Schmidt (National Institute of Standards and Technology (NIST), Boulder, Colorado, USA) Daniel Becker (National Institute of Standards and Technology (NIST), Boulder, Colorado, USA) Daniel Swetz (National Institute of Standards and Technology (NIST), Boulder, Colorado, USA) Danilo Labranca (Dipartimento di Fisica, Universit`a di Milano-Bicocca, Milano, Italy) Dorothea Schumann (Paul Scherrer Institut (PSI), Villigen, Switzerland) Douglas Bennett (National Institute of Standards and Technology (NIST), Boulder, Colorado, USA) Edvige Celasco (Dipartimento di Fisica, Universit`a di Genova, Genova, Italy) Elena Ferri (Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Milano-Bicocca, Milano, Italy) Emilio Maugeri (Paul Scherrer Institut (PSI), Villigen, Switzerland) Fabio Siccardi (Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Genova, Genova, Italy) Flavio Gatti (Dipartimento di Fisica, Universit`a di Genova, Genova, Italy) Gene Hilton (National Institute of Standards and Technology (NIST), Boulder, Colorado, USA) Giancarlo Ceruti (Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Milano-Bicocca, Milano, Italy) Gianluigi Pessina (Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Milano-Bicocca, Milano, Italy) Giovanni Gallucci (Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Genova, Genova, Italy) Joel Ullom (National Institute of Standards and Technology (NIST), Boulder, Colorado, USA) John Gard (National Institute of Standards and Technology (NIST), Boulder, Colorado, USA) John Mates (National Institute of Standards and Technology (NIST), Boulder, Colorado, USA) Joseph Fowler (National Institute of Standards and Technology (NIST), Boulder, Colorado, USA) Leila Vale (National Institute of Standards and Technology (NIST), Boulder, Colorado, USA) Luigi Parodi (Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Genova, Genova, Italy) Marco Faverzani (Dipartimento di Fisica, Universit`a di Milano-Bicocca, Milano, Italy) Marco Gobbo (Dipartimento di Fisica, Universit`a di Milano-Bicocca, Milano, Italy) Matteo Borghesi (Dipartimento di Fisica, Universit`a di Milano-Bicocca, Milano, Italy) Matteo De Gerone (Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Genova, Genova, Italy) Maurizio Lusignoli (Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Roma 1, Roma, Italy) Noemi Cerboni (Paul Scherrer Institut (PSI), Villigen, Switzerland) Pietro Campana (Dipartimento di Fisica, Universit`a di Milano-Bicocca, Milano, Italy) Roberto Moretti (Dipartimento di Fisica, Universit`a di Milano-Bicocca, Milano, Italy) Rodolfo Carobene (Dipartimento di Fisica, Universit`a di Milano-Bicocca, Milano, Italy) Rugard Dressler (Paul Scherrer Institut (PSI), Villigen, Switzerland) Stefano Ragazzi (Dipartimento di Fisica, Universit`a di Milano-Bicocca, Milano, Italy) Ulli Köster (Institut Laue-Langevin (ILL), Grenoble, France)

Presentation materials

picture-Origo-Luca-HOLMES.jpg
poster-Origo-Luca-HOLMES.pdf
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