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1. An updated overview of the HOLMES status

Author: Borghesi, M., Alpert, B., Balata, M., Becker, D., Bennet, D., Celasco, E., Cerboni, N., De Gerone, M., Dressler, R., Faverzani, M., Fedkevych, M., Ferri, E., Fowler, J., Gallucci, G., Gard, J., Gatti, F., Giachero, A., Hilton, G., Koster, U., Labranca, D., Lusignoli, M., Mates, J., Maugeri, E., Nisi, S., Nucciotti, A., Origo, L., Pessina, G., Ragazzi, S., Reintsema, C., Schmidt, D., Schumann, D., Swetz, D., Ullom, J., and Vale, L.
Published: 2023
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2. Status of the HOLMES Experiment

Author: De Gerone, M., Alpert, B., Balata, M., Becker, D. T., Bennett, D. A., Bevilacqua, A., Borghesi, M., Ceruti, G., De Galembert, G. De Bodin, Dressler, R., Faverzani, M., Fedkevych, M., Ferri, E., Fowler, J. W., Gallucci, G., Gard, J. D., Gatti, F., Giachero, A., Hilton, G. C., Köster, U., Lusignoli, M., Manfrinetti, P., Mates, J. A. B., Maugeri, E., Nisi, S., Nucciotti, A., Parodi, L., Pessina, G., Ragazzi, S., Reintsema, C. D., Schmidt, D. R., Schumann, D., Siccardi, F., Swetz, D. S., Ullom, J. N., and Vale, L. R.
Published: 2022
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3. Status of the HOLMES Experiment to Directly Measure the Neutrino Mass

Author: Nucciotti, A., Alpert, B., Balata, M., Bennett, D. BeckerD., Bevilacqua, A., Biasotti, M., Ceriale, V., Ceruti, G., Corsini, D., De Gerone, M., Dressler, R., Faverzani, M., Ferri, E., Fowler, J., Gallucci, G., Gard, J., Gatti, F., Giachero, A., Hays-Wehle, J., Heinitz, S., Hilton, G., Köster, U., Lusignoli, M., Mates, J., Nisi, S., Orlando, A., Parodi, L., Pessina, G., Puiu, A., Ragazzi, S., Reintsema, C., Ribeiro-Gomez, M., Schmidt, D., Schuman, D., Siccardi, F., Swetz, D., Ullom, J., and Vale, L.
Subjects: Physics - Instrumentation and Detectors, High Energy Physics - Experiment, Nuclear Experiment
Abstract: 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 independent measurement of the absolute scale of neutrino mass. HOLMES is an experiment funded by the European Research Council to directly measure the neutrino mass. HOLMES will perform a calorimetric measurement of the energy released in the electron capture decay of the artificial isotope $^{163}$Ho. In a calorimetric measurement the energy released in the decay process is entirely contained into the detector, except for the fraction taken away by the neutrino. This approach eliminates both the issues related to the use of an external source and the systematic uncertainties arising from decays on excited final states. The most suitable detectors for this type of measurement are low temperature thermal detectors, where all the energy released into an absorber is converted into a temperature increase that can be measured by a sensitive thermometer directly coupled with the absorber. This measurement was originally proposed in 1982 by A. De Rujula and M. Lusignoli, but only in the last decade the technological progress in detectors development has allowed to design a sensitive experiment. HOLMES plans to deploy a large array of low temperature microcalorimeters with implanted $^{163}$Ho nuclei. In this contribution we outline the HOLMES project with its physics reach and technical challenges, along with its status and perspectives., Comment: This is a pre-print of an article published in Journal of Low Temperature Physics. The final authenticated version is available online at: https://doi.org/10.1007/s10909-018-2025-x
Published: 2018
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4. Measuring the electron neutrino mass with improved sensitivity: the HOLMES experiment

Author: Giachero, A., Alpert, B., Becker, D., Bennett, D., Biasotti, M., Brofferio, C., Ceriale, V., Ceruti, G., Corsini, D., Day, P., De Gerone, M., Dressler, R., Faverzani, M., Ferri, E., Fowler, J., Fumagalli, E., Gallucci, G., Gard, J., Hays-Wehle, F. Gatti J., Heinitz, S., Hilton, G., Koester, U., Lusignoli, M., Mates, J., Nisi, S., Nucciotti, A., Orlando, A., Parodi, L., Pessina, G., Pizzigoni, G., Puiu, A., Ragazzi, S., Reintsema, C., Ribeiro-Gomes, M., Schmidt, D., Schumann, D., Siccardi, F., Sisti, M., Swetz, D., Terranova, F., Ullom, J., and Vale, L.
Subjects: Physics - Instrumentation and Detectors
Abstract: 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 eliminates systematic uncertainties arising from the use of external beta sources, as in experiments with spectrometers. This measurement was proposed in 1982 by A. De Rujula and M. Lusignoli, but only recently the detector technological progress has allowed to design a sensitive experiment. HOLMES will deploy a large array of low temperature microcalorimeters with implanted $^{163}$Ho nuclei. HOLMES, besides being an important step forward in the direct neutrino mass measurement with a calorimetric approach, will also establish the potential of this approach to extend the sensitivity down to 0.1 eV and lower. In its final configuration HOLMES will collect about $3\cdot 10^{13}$ decays with 1000 detectors characterized by an instrumental energy resolution of the order of few eV and a time resolution of few microseconds. To embed the $^{163}$Ho into the gold absorbers a custom mass separator ion implanter is being developed. The detectors used for the HOLMES experiment will be Mo/Cu bilayers TESs (Transition Edge Sensors) on SiN$_x$ membrane with gold absorbers. Microwave multiplexed rf-SQUIDs are the best available technique to read out large array of such detectors. An extensive R&D activity is in progress in order to maximize the multiplexing factor while preserving the performances of the individual detectors. The current activities are focused on the the single detector performances optimization and on the $^{163}$Ho isotope production and embedding. A preliminary measurement of a sub-array of $4\times 16$ detectors is planned late in 2017. In this contribution we present the HOLMES project with its technical challenges, its status and perspectives.
Published: 2016
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5. The calorimetric spectrum of the electron-capture decay of $^{163}$Ho. The spectral endpoint region

Author: De Rújula, A. and Lusignoli, M.
Subjects: High Energy Physics - Phenomenology, Nuclear Theory, Physics - Atomic Physics
Abstract: 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, HOLMES and NuMECS) are currently studying its decay. The most relevant range of the calorimetric-energy spectrum extends for the last few hundred eV below its endpoint. It has not yet been well measured. We explore the theory, mainly in the cited range, of electron capture in $^{163}$Ho decay. A so far neglected process turns out to be most relevant: electron-capture accompanied by the shake-off of a second electron. Our two main conclusions are very encouraging: the counting rate close to the endpoint may be more than an order of magnitude larger than previously expected; the "pile-up" problem may be significantly reduced., Comment: Clarifying changes suggested by a referee. Results unchanged. 14 pages, 15 figures
Published: 2016
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6. The calorimetric spectrum of the electron-capture decay of $^{163}$Ho. A preliminary analysis of the preliminary data

Author: De Rújula, A. and Lusignoli, M.
Subjects: High Energy Physics - Phenomenology, Nuclear Theory, Physics - Atomic Physics
Abstract: 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 pursued in various experiments (ECHo, HOLMES and NuMECS) is "calorimetric". The calorimetric energy spectrum is a sum over the unstable vacant orbitals, or "holes", left by the electrons weakly captured by the nucleus. We discuss the current progress in this field and analize the preliminary data. Our conclusion is that, as pointed out by Robertson, the contribution of two-hole states is not negligible. But --in strong contradistinction with the tacit conclusion of previous comparisons of theory and observations-- we find a quite satisfactory agreement. A crucial point is that, in the creation of secondary holes, electron shakeoff and not only electron shakeup must be taken into account., Comment: 6 pages, 5 figures. Section IV and Fig.3 added. Minor text modifications
Published: 2015

7. HOLMES - The Electron Capture Decay of 163Ho to Measure the Electron Neutrino Mass with sub-eV sensitivity

Author: Alpert, B., Balata, M., Bennett, D., Biasotti, M., Boragno, C., Brofferio, C., Ceriale, V., Corsini, D., Day, P. K., De Gerone, M., Dressler, R., Faverzani, M., Ferri, E., Fowler, J., Gatti, F., Giachero, A., Hays-Wehle, J., Heinitz, S., Hilton, G., Koester, U., Lusignoli, M., Maino, M., Mates, J., Nisi, S., Nizzolo, R., Nucciotti, A., Pessina, G., Pizzigoni, G., Puiu, A., Ragazzi, S., Reintsema, C., Gomes, M. Ribeiro, Schmidt, D., Schumann, D., Sisti, M., Swetz, D., Terranova, F., and Ullom, J.
Subjects: Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract: 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 eliminates systematic uncertainties arising from the use of external beta sources, as in experiments with beta spectrometers. This measurement was proposed in 1982 by A. De Rujula and M. Lusignoli, but only recently the detector technological progress allowed to design a sensitive experiment. HOLMES will deploy a large array of low temperature microcalorimeters with implanted 163Ho nuclei. The resulting mass sensitivity will be as low as 0.4 eV. HOLMES will be an important step forward in the direct neutrino mass measurement with a calorimetric approach as an alternative to spectrometry. It will also establish the potential of this approach to extend the sensitivity down to 0.1 eV. We outline here the project with its technical challenges and perspectives., Comment: 11 pages, 9 figures
Published: 2014
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8. Status of the HOLMES Experiment

Author: Faverzani, M., Alpert, B., Balata, M., Backer, D., Bennet, D., Bevilaqua, A., Biasotti, M., Borghesi, M., Ceruti, G., De Gerone, M., Dressler, R., Ferri, E., Fowler, J., Gallucci, G., Gard, J., Gatti, F., Giachero, A., Heinitz, S., Hilton, G., Köster, U., Lusignoli, M., Mates, J., Maugeri, E., Nisi, S., Nucciotti, A., Parodi, L., Pessina, G., Puiu, A., Ragazzi, S., Reintsema, C., Ribeiro-Gomez, M., Schmidt, D., Schumann, D., Siccardi, F., Swetz, D., Ullom, J., and Vale, L.
Published: 2020
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9. The Future of Neutrino Mass Measurements: Terrestrial, Astrophysical, and Cosmological Measurements in the Next Decade. Highlights of the NuMass 2013 Workshop. Milano, Italy, February 4 - 7, 2013

Author: Barker, G. J., Biassoni, M., De Rujula, A., De Vega, H. J., Engle, J. W., Faverzani, M., Ferri, E., Formaggio, J., Gastaldo, L., Gatti, F., Gorla, P., Köster, U., Lahiri, S., Lusignoli, M., Nucciotti, A., Ota, T., Sisti, M., Sorel, M., Terranova, F., Vissani, F., Wandkowsky, N., and Yoshimura, M.
Subjects: High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract: The third Workshop of the NuMass series ("The Future of Neutrino Mass Measurements: Terrestrial, Astrophysical, and Cosmological Measurements in the Next Decade: NuMass 2013") was held at Dipartimento di Fisica "G. Occhialini, University of Milano-Bicocca in Milano, Italy, on 4-7 February 2013. The goal of this international workshop was to review the status and future of direct and indirect neutrino mass measurements in the laboratory as well as from astrophysical and cosmological observations. This paper collects most of the contributions presented during the Workshop.
Published: 2013

10. An updated overview of the HOLMES status

Author: Borghesi, M, Alpert, B, Balata, M, Becker, D, Bennet, D, Celasco, E, Cerboni, N, De Gerone, M, Dressler, R, Faverzani, M, Fedkevych, M, Ferri, E, Fowler, J, Gallucci, G, Gard, J, Gatti, F, Giachero, A, Hilton, G, Koster, U, Labranca, D, Lusignoli, M, Mates, J, Maugeri, E, Nisi, S, Nucciotti, A, Origo, L, Pessina, G, Ragazzi, S, Reintsema, C, Schmidt, D, Schumann, D, Swetz, D, Ullom, J, Vale, L, Borghesi M., Alpert B., Balata M., Becker D., Bennet D., Celasco E., Cerboni N., De Gerone M., Dressler R., Faverzani M., Fedkevych M., Ferri E., Fowler J., Gallucci G., Gard J., Gatti F., Giachero A., Hilton G., Koster U., Labranca D., Lusignoli M., Mates J., Maugeri E., Nisi S., Nucciotti A., Origo L., Pessina G., Ragazzi S., Reintsema C., Schmidt D., Schumann D., Swetz D., Ullom J., Vale L., Borghesi, M, Alpert, B, Balata, M, Becker, D, Bennet, D, Celasco, E, Cerboni, N, De Gerone, M, Dressler, R, Faverzani, M, Fedkevych, M, Ferri, E, Fowler, J, Gallucci, G, Gard, J, Gatti, F, Giachero, A, Hilton, G, Koster, U, Labranca, D, Lusignoli, M, Mates, J, Maugeri, E, Nisi, S, Nucciotti, A, Origo, L, Pessina, G, Ragazzi, S, Reintsema, C, Schmidt, D, Schumann, D, Swetz, D, Ullom, J, Vale, L, Borghesi M., Alpert B., Balata M., Becker D., Bennet D., Celasco E., Cerboni N., De Gerone M., Dressler R., Faverzani M., Fedkevych M., Ferri E., Fowler J., Gallucci G., Gard J., Gatti F., Giachero A., Hilton G., Koster U., Labranca D., Lusignoli M., Mates J., Maugeri E., Nisi S., Nucciotti A., Origo L., Pessina G., Ragazzi S., Reintsema C., Schmidt D., Schumann D., Swetz D., Ullom J., and Vale L.
Abstract: HOLMES is an ERC project started in 2014 that will perform a model independent measurement of the neutrino mass with a sensitivity of the order of 1 eV. In order to reach its goal sensitivity, HOLMES will use 1000 low temperature microcalorimeters, each implanted with an activity of 300 Bq of 163Ho, performing thus a calorimetric measurement. This contribution presents the recent results achieved that lay the grounds for the low-activity phase of the HOLMES experiment, that will lead to its first limit on the neutrino mass.
Published: 2023

11. A comment on hadronic charm decays

Author: Lusignoli, M. and Pugliese, A.
Subjects: High Energy Physics - Phenomenology
Abstract: We give arguments in favor of the compatibility with standard physics of some large nonleptonic branching fractions in Cabibbo--forbidden $D^+$ decays, contrary to a recent claim in the literature., Comment: 8 pages, 4 tables. A few changes in the text, following revised version of ref. 6. New reference added, no change in the numerical results
Published: 2002

12. Telling three from four neutrinos at the Neutrino Factory

Author: Donini, A., Lusignoli, M., and Meloni, D.
Subjects: High Energy Physics - Phenomenology
Abstract: We upgrade the study of the physical reach of a Neutrino Factory considering the possibility to distinguish a three (active) neutrino oscillation scenario from the scenario in which a light sterile neutrino is also present. The distinction is easily performed in the so--called 2+2 scheme, but also in the more problematic 3+1 scheme it can be attained in some regions of the parameter space. We also discuss the CP violating phase determination, showing that the effects of a large phase in the three--neutrino theory cannot be reproduced in a four--neutrino, CP conserving, model., Comment: 21 Latex2e pages, 9 figures using epsfig; minor changes and a footnote added, to be published on Nucl. Phys. B
Published: 2001
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13. Neutrino Decay and Atmospheric Neutrinos

Author: Barger, V., Learned, J. G., Lipari, P., Lusignoli, M., Pakvasa, S., and Weiler, T. J.
Subjects: High Energy Physics - Phenomenology, Astrophysics, High Energy Physics - Experiment
Abstract: We reconsider neutrino decay as an explanation for atmospheric neutrino observations. We show that if the mass-difference relevant to the two mixed states \nu_\mu and \nu_\tau is very small (< 10^{-4} eV^2), then a very good fit to the observations can be obtained with decay of a component of \nu_\mu to a sterile neutrino and a Majoron. We discuss how the K2K and MINOS long-baseline experiments can distinguish the decay and oscillation scenarios., Comment: 9 pages, Revtex, uses epsf.sty, 3 postscript figures. Additions and corrections to references, minor changes in the text and to some numbers
Published: 1999
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14. Charm nonleptonic decays and final state interactions

Author: Buccella, F., Lusignoli, M., and Pugliese, A.
Subjects: High Energy Physics - Phenomenology
Abstract: A global previous analysis of two-body nonleptonic decays of $D$ mesons has been extended to the decays involving light scalar mesons. The allowance for final state interaction also in nonresonant channels provides a fit of much improved quality and with less symmetry breaking in the axial charges. We give predictions for about 50 decay branching ratios yet to be measured. We also discuss long distance contributions to the difference $\Delta \Gamma$ between the $D_S$ and $D_L$ widths., Comment: 14 pages, no figures, plain TeX, uses harvmac.tex and tables.tex
Published: 1996
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15. Nonleptonic weak decays of charmed mesons

Author: Buccella, F., Lusignoli, M., Miele, G., Pugliese, A., and Santorelli, P.
Subjects: High Energy Physics - Phenomenology
Abstract: A previous analysis of two-body Cabibbo allowed nonleptonic decays of $D^0$ mesons and of Cabibbo allowed and first-forbidden decays of $D^+$ and $D_s^+$ has been adjourned using more recent experimental data and extended to the Cabibbo forbidden decays of $D^0$. Annihilation and W-exchange contributions as well as final state interaction effects (assumed to be dominated by nearby resonances) have been included and are in fact crucial to obtain a reasonable agreement with the experimental data, which show large flavour SU(3) violations. New fitting parameters are necessary to describe rescattering effects for Cabibbo forbidden $D^0$ decays, given the lack of experimental informations on isoscalar resonances. We keep their number to a minimum - three - using phenomenologically based considerations. We also discuss CP violating asymmetries., Comment: 24 pages, plain TeX, uses harvmac.tex and tables.tex
Published: 1994
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16. CP violating asymmetries in charged D meson decays

Author: Buccella, F., Lusignoli, M., Mangano, G., Miele, G., Pugliese, A., and Santorelli, P.
Subjects: High Energy Physics - Phenomenology
Abstract: The CP violating asymmetries for Cabibbo suppressed charged D meson decays in the standard model are estimated in the factorized approximation, using the two-loop effective hamiltonian and a model for final state interactions previously tested for Cabibbo allowed D decays. No new parameters are added. The predictions are larger than expected and not too far from the experimental possibilities., Comment: 13 pages, Roma n. 917
Published: 1992
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17. Matter Effects in Atmospheric Neutrino Oscillations

Author: Akhmedov, E., Lipari, P., and Lusignoli, M.
Subjects: High Energy Physics - Phenomenology
Abstract: The Kamiokande II and IMB data on contained events induced by atmospheric neutrinos exhibit too low a ratio of muons to electrons, which has been interpreted as a possible indication of neutrino oscillations. At the same time, the recent data on upward--going muons in underground detectors have shown no evidence for neutrino oscillations, strongly limiting the allowed region of oscillation parameter space. In this paper we confront different types of neutrino oscillation hypotheses with the experimental results. The matter effects in $\nu_\mu \leftrightarrow \nu_e$ and in $\nu_\mu \leftrightarrow \nu_{sterile}$ oscillations are discussed and shown to affect significantly the upward--going muons., Comment: LaTeX, 13 pages, 4 figures (appended as postscript file in the end of the paper, one should cut them and process separately), Roma n. 912
Published: 1992
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18. Inside HOLMES experiment: 163Ho metallic target production for the micro-calorimeter absorber

Author: Pizzigoni, G., Alpert, B., Balata, M., Bennett, D., Biasotti, M., Boragno, C., Brofferio, C., De Gerone, M., Dressler, R., Faverazani, M., Ferri, E., Folwer, J., Gatti, F., Giachero, A., Heinitz, S., Hilton, G., Köster, U., Lusignoli, M., Maino, M., Mates, J., Nisi, S., Nizzolo, R., Nucciotti, A., Pessina, G., Puiu, A., Ragazzi, S., Reintsema, C., Ribeiro Gomes, M., Shmidt, D., Schumann, D., Sisti, M., Swetz, D., Terranova, F., Ullom, J., and Day, P.K.
Published: 2016
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19. Multiplexed Superconducting Detectors for a Neutrino Mass Experiment

Author: Ferri, E, Alpert, B, Balata, M, Becker, D, Bennett, D, Borghesi, M, De Gerone, M, Dressler, R, Faverzani, M, Fedkevych, M, Fowler, J, Gallucci, G, Gard, J, Gatti, F, Giachero, A, Hilton, G, Koster, U, Lusignoli, M, Mates, J, Maugeri, E, Nisi, S, Nucciotti, A, Pessina, G, Ragazzi, S, Reintsema, C, Ribeiro Gomes, M, Schmidt, D, Schumann, D, Swetz, D, Ullom, J, Vale, L, Ferri E., Alpert B., Balata M., Becker D., Bennett D., Borghesi M., De Gerone M., Dressler R., Faverzani M., Fedkevych M., Fowler J., Gallucci G., Gard J. D., Gatti F., Giachero A., Hilton G. C., Koster U., Lusignoli M., Mates J. A. B., Maugeri E. A., Nisi S., Nucciotti A., Pessina G., Ragazzi S., Reintsema C. D., Ribeiro Gomes M., Schmidt D., Schumann D., Swetz D., Ullom J., Vale L. R., Ferri, E, Alpert, B, Balata, M, Becker, D, Bennett, D, Borghesi, M, De Gerone, M, Dressler, R, Faverzani, M, Fedkevych, M, Fowler, J, Gallucci, G, Gard, J, Gatti, F, Giachero, A, Hilton, G, Koster, U, Lusignoli, M, Mates, J, Maugeri, E, Nisi, S, Nucciotti, A, Pessina, G, Ragazzi, S, Reintsema, C, Ribeiro Gomes, M, Schmidt, D, Schumann, D, Swetz, D, Ullom, J, Vale, L, Ferri E., Alpert B., Balata M., Becker D., Bennett D., Borghesi M., De Gerone M., Dressler R., Faverzani M., Fedkevych M., Fowler J., Gallucci G., Gard J. D., Gatti F., Giachero A., Hilton G. C., Koster U., Lusignoli M., Mates J. A. B., Maugeri E. A., Nisi S., Nucciotti A., Pessina G., Ragazzi S., Reintsema C. D., Ribeiro Gomes M., Schmidt D., Schumann D., Swetz D., Ullom J., and Vale L. R.
Abstract: One of the major challenges in nowadays particle physics and astrophysics is the determination of the absolute neutrino mass scale. A powerful tool to evaluate the effective neutrino mass is the calorimetric measurement of the energy released in a nuclear decay involving neutrino. In order to reach a sensitivity on the neutrino mass of the order of 1 eV, not only detectors characterized by high performances (i.e. energy and time resolution of eV at keV and 1 s, respectively) are needed but also many detectors working in parallel are required. Microwave frequency readout provide an effective technique to read out large arrays of low temperature detectors allowing to reach a multiplex factor of the order of thousands. This technique is the one used to read out the 1000 Transition Edge Sensors of HOLMES, an experiment that aims at measuring the electron neutrino mass by means of the electron capture (EC) decay of 163Ho with an expected sensitivity of the order of 1 eV. In this contribution we present the characterization of the microwave-multiplexed readout system, and the results obtained with the detectors specifically designed for HOLMES.
Published: 2022

20. Probing the absolute neutrino mass scale with 163Ho: The HOLMES project

Author: De Gerone, M., Alpert, B., Becker, D., Bennett, D., Biasotti, M., Ceriale, V., Dressler, R., Faverzani, M., Ferri, E., Fowler, J., Gallucci, G., Gard, J., Gatti, F., Giachero, A., Hays-Wehle, J., Heinitz, S., Hilton, G., Koester, U., Lusignoli, M., Mates, J., Nucciotti, A., Nisi, S., Orlando, A., Pessina, G., Puiu, A., Ragazzi, S., Reintsema, C., Ribeiro Gomes, M., Schmidt, D., Schumann, D., Swetz, D., Ullom, J., and Vale, L.
Published: 2019
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21. The HOLMES Experiment

Author: Faverzani, M., Alpert, B., Backer, D., Bennet, D., Biasotti, M., Brofferio, C., Ceriale, V., Ceruti, G., Corsini, D., Day, P. K., De Gerone, M., Dressler, R., Ferri, E., Fowler, J., Fumagalli, E., Gard, J., Gatti, F., Giachero, A., Hays-Wehle, J., Heinitz, S., Hilton, G., Köster, U., Lusignoli, M., Maino, M., Mates, J., Nisi, S., Nizzolo, R., Nucciotti, A., Orlando, A., Parodi, L., Pessina, G., Pizzigoni, G., Puiu, A., Ragazzi, S., Reintsema, C., Ribeiro-Gomez, M., Schmidt, D., Schuman, D., Siccardi, F., Sisti, M., Swetz, D., Terranova, F., Ullom, J., and Vale, L.
Published: 2016
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22. Multiplexed Superconducting Detectors for a Neutrino Mass Experiment

Author: Ferri, E., primary, Alpert, B., additional, Balata, M., additional, Becker, D. T., additional, Bennett, D. A., additional, Borghesi, M., additional, De Gerone, M., additional, Dressler, R., additional, Faverzani, M., additional, Fedkevych, M., additional, Fowler, J., additional, Gallucci, G., additional, Gard, J. D., additional, Gatti, F., additional, Giachero, A., additional, Hilton, G. C., additional, Koester, U., additional, Lusignoli, M., additional, Mates, J. A. B., additional, Maugeri, E., additional, Nisi, E., additional, Nucciotti, A., additional, Pessina, G., additional, Ragazzi, S., additional, Reintsema, C. D., additional, Ribeiro-Gomes, M., additional, Schmidt, D. R., additional, Schumann, D., additional, Swetz, D. S., additional, Ullom, J. N., additional, and Vale, L. R., additional
Published: 2022
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23. Status of the HOLMES Experiment

Author: Faverzani, M, Alpert, B, Balata, M, Backer, D, Bennet, D, Bevilaqua, A, Biasotti, M, Borghesi, M, Ceruti, G, De Gerone, M, Dressler, R, Ferri, E, Fowler, J, Gallucci, G, Gard, J, Gatti, F, Giachero, A, Heinitz, S, Hilton, G, Köster, U, Lusignoli, M, Mates, J, Maugeri, E, Nisi, S, Nucciotti, A, Parodi, L, Pessina, G, Puiu, A, Ragazzi, S, Reintsema, C, Ribeiro-Gomez, M, Schmidt, D, Schumann, D, Siccardi, F, Swetz, D, Ullom, J, Vale, L, Faverzani, M., Alpert, B., Balata, M., Backer, D., Bennet, D., Bevilaqua, A., Biasotti, M., Borghesi, M., Ceruti, G., De Gerone, M., Dressler, R., Ferri, E., Fowler, J., Gallucci, G., Gard, J., Gatti, F., Giachero, A., Heinitz, S., Hilton, G., Köster, U., Lusignoli, M., Mates, J., Maugeri, E., Nisi, S., Nucciotti, A., Parodi, L., Pessina, G., Puiu, A., Ragazzi, S., Reintsema, C., Ribeiro-Gomez, M., Schmidt, D., Schumann, D., Siccardi, F., Swetz, D., Ullom, J., Vale, L., Faverzani, M, Alpert, B, Balata, M, Backer, D, Bennet, D, Bevilaqua, A, Biasotti, M, Borghesi, M, Ceruti, G, De Gerone, M, Dressler, R, Ferri, E, Fowler, J, Gallucci, G, Gard, J, Gatti, F, Giachero, A, Heinitz, S, Hilton, G, Köster, U, Lusignoli, M, Mates, J, Maugeri, E, Nisi, S, Nucciotti, A, Parodi, L, Pessina, G, Puiu, A, Ragazzi, S, Reintsema, C, Ribeiro-Gomez, M, Schmidt, D, Schumann, D, Siccardi, F, Swetz, D, Ullom, J, Vale, L, Faverzani, M., Alpert, B., Balata, M., Backer, D., Bennet, D., Bevilaqua, A., Biasotti, M., Borghesi, M., Ceruti, G., De Gerone, M., Dressler, R., Ferri, E., Fowler, J., Gallucci, G., Gard, J., Gatti, F., Giachero, A., Heinitz, S., Hilton, G., Köster, U., Lusignoli, M., Mates, J., Maugeri, E., Nisi, S., Nucciotti, A., Parodi, L., Pessina, G., Puiu, A., Ragazzi, S., Reintsema, C., Ribeiro-Gomez, M., Schmidt, D., Schumann, D., Siccardi, F., Swetz, D., Ullom, J., and Vale, L.
Abstract: The absolute neutrino mass is still an unknown parameter in the modern landscape of particle physics. The HOLMES experiment aims at exploiting the calorimetric approach to directly measure the neutrino mass through the kinematic measurement of the decay products of the weak process decay of 163Ho. This low energy decaying isotope, in fact, undergoes electron capture emitting a neutrino and leaving the daughter atom, 163Dy∗, in an atomic excited state. This, in turn, relaxes by emitting electrons and, to a considerably lesser extent, photons. The high-energy portion of the calorimetric spectrum of this decay is affected by the non-vanishing neutrino mass value. Given the small fraction of events falling within the region of interest, to achieve a high experimental sensitivity on the neutrino mass, it is important to have a high activity combined with a very small undetected pileup contribution. To achieve these targets, the final configuration of HOLMES foresees the deployment of a large number of 163Ho ion-implanted TESs characterized by an ambitiously high activity of 300 Hz each. In this paper, we outline the status of the major tasks that will bring HOLMES to achieve a statistical sensitivity on the neutrino mass as low as 2 eV/c2.
Published: 2020

24. Probing the absolute neutrino mass scale with the 163Ho: The HOLMES project

Author: Gerone, M, Alpert, B, Becker, D, Bennett, D, Biasotti, M, Ceriale, V, Dressier, R, Faverzani, M, Ferri, E, Fowler, J, Gallucci, G, Gard, J, Gatti, F, Giachero, A, Hays-Wehle, J, Heinitz, S, Hilton, G, Koester, U, Lusignoli, M, Mates, J, Nisi, S, Orlando, A, Pessina, G, Puiu, A, Ragazzi, S, Reintsema, C, Ribeiro-Gomes, M, Schmidt, D, Schumann, D, Swetz, D, Ullom, J, Vale, L, Gerone M. D., Alpert B., Becker D., Bennett D., Biasotti M., Ceriale V., Dressier R., Faverzani M., Ferri E., Fowler J., Gallucci G., Gard J., Gatti F., Giachero A., Hays-Wehle J., Heinitz S., Hilton G., Koester U., Lusignoli M., Mates J., Nisi S., Orlando A., Pessina G., Puiu A., Ragazzi S., Reintsema C., Ribeiro-Gomes M., Schmidt D., Schumann D., Swetz D., Ullom J., Vale L., Gerone, M, Alpert, B, Becker, D, Bennett, D, Biasotti, M, Ceriale, V, Dressier, R, Faverzani, M, Ferri, E, Fowler, J, Gallucci, G, Gard, J, Gatti, F, Giachero, A, Hays-Wehle, J, Heinitz, S, Hilton, G, Koester, U, Lusignoli, M, Mates, J, Nisi, S, Orlando, A, Pessina, G, Puiu, A, Ragazzi, S, Reintsema, C, Ribeiro-Gomes, M, Schmidt, D, Schumann, D, Swetz, D, Ullom, J, Vale, L, Gerone M. D., Alpert B., Becker D., Bennett D., Biasotti M., Ceriale V., Dressier R., Faverzani M., Ferri E., Fowler J., Gallucci G., Gard J., Gatti F., Giachero A., Hays-Wehle J., Heinitz S., Hilton G., Koester U., Lusignoli M., Mates J., Nisi S., Orlando A., Pessina G., Puiu A., Ragazzi S., Reintsema C., Ribeiro-Gomes M., Schmidt D., Schumann D., Swetz D., Ullom J., and Vale L.
Abstract: The HOLMES project aims to directly measure the electron neutrino mass using the electron capture decay (EC) of 163Ho down to the eV scale. It will perform a precise measurement of the end-point of the 163Ho calorimetric energy spectrum to search for the deformation caused by a finite electron neutrino mass. The choice of 163Ho as source is driven by the very low Q-value of the EC reaction (around 2.8 keV), which allows for a high sensitivity while keeping the overall activities to reasonable value (O(102)Hz/detector), thus reducing the pile-up probability. A large array made of thousands of Transition Edge Sensor based micro-calorimeters will be used for a calorimetric measurement of the EC 163Ho spectrum. The calorimetric approach, with the source embedded inside the detector, eliminates systematic uncertainties arising from the use of an external beta-source, and minimizes the effect of the atomic de-excitation process uncertainties. The commissioning of the first implanted sub-Array is scheduled for the end of 2017. It will provide useful data about the EC decay of 163Ho together with a first limit on neutrino mass. In this paper the current status of the main tasks will be summarized: The TES array design and engineering, the isotope preparation and embedding, and the development of a high speed multiplexed SQUID read-out system for the data acquisition.
Published: 2020

25. Status of the HOLMES detector development

Author: Nucciotti, A., Alpert, B., Becker, D., Bennett, D., Biasotti, M., Brofferio, C., Ceriale, V., Ceruti, G., Corsini, D., Day, P., De Gerone, M., Dressler, R., Faverzani, M., Ferri, E., Fowler, J., Fumagalli, E., Gard, J., Gatti, F., Giachero, A., Hays-Wehle, J., Heinitz, S., Hilton, G., Koester, U., Lusignoli, M., Maino, M., Mates, J., Nisi, S., Nizzolo, R., Orlando, A., Parodi, L., Pessina, G., Pizzigoni, G., Puiu, A., Ragazzi, S., Reintsema, C., Ribeiro-Gomes, M., Schmidt, D., Schumann, D., Siccardi, F., Sisti, M., Swetz, D., Terranova, F., Ullom, J., and Vale, L.
Published: 2016
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26. Probing the absolute neutrino mass scale with 163Ho: The HOLMES project

Author: De Gerone, M, Alpert, B, Becker, D, Bennett, D, Biasotti, M, Ceriale, V, Dressler, R, Faverzani, M, Ferri, E, Fowler, J, Gallucci, G, Gard, J, Gatti, F, Giachero, A, Hays-Wehle, J, Heinitz, S, Hilton, G, Koester, U, Lusignoli, M, Mates, J, Nucciotti, A, Nisi, S, Orlando, A, Pessina, G, Puiu, A, Ragazzi, S, Reintsema, C, Ribeiro Gomes, M, Schmidt, D, Schumann, D, Swetz, D, Ullom, J, Vale, L, De Gerone M., Alpert B., Becker D., Bennett D., Biasotti M., Ceriale V., Dressler R., Faverzani M., Ferri E., Fowler J., Gallucci G., Gard J., Gatti F., Giachero A., Hays-Wehle J., Heinitz S., Hilton G., Koester U., Lusignoli M., Mates J., Nucciotti A., Nisi S., Orlando A., Pessina G., Puiu A., Ragazzi S., Reintsema C., Ribeiro Gomes M., Schmidt D., Schumann D., Swetz D., Ullom J., Vale L., De Gerone, M, Alpert, B, Becker, D, Bennett, D, Biasotti, M, Ceriale, V, Dressler, R, Faverzani, M, Ferri, E, Fowler, J, Gallucci, G, Gard, J, Gatti, F, Giachero, A, Hays-Wehle, J, Heinitz, S, Hilton, G, Koester, U, Lusignoli, M, Mates, J, Nucciotti, A, Nisi, S, Orlando, A, Pessina, G, Puiu, A, Ragazzi, S, Reintsema, C, Ribeiro Gomes, M, Schmidt, D, Schumann, D, Swetz, D, Ullom, J, Vale, L, De Gerone M., Alpert B., Becker D., Bennett D., Biasotti M., Ceriale V., Dressler R., Faverzani M., Ferri E., Fowler J., Gallucci G., Gard J., Gatti F., Giachero A., Hays-Wehle J., Heinitz S., Hilton G., Koester U., Lusignoli M., Mates J., Nucciotti A., Nisi S., Orlando A., Pessina G., Puiu A., Ragazzi S., Reintsema C., Ribeiro Gomes M., Schmidt D., Schumann D., Swetz D., Ullom J., and Vale L.
Abstract: The HOLMES project aims to directly measure the nu mass down to the eV scale using the electron capture decay (EC) of Ho-163. It will perform a precise calorimetric measurement of the end-point of the Ho energy spectrum looking for the deformation caused by a finite nu mass. The choice of Ho-163 as source is driven by the very low Q-value of the EC reaction, which allows for high sensitivity with low activities (O(10(2))Bq/detector), thus reducing the pile-up probability. A large array made by thousands of transition edge sensors based micro-calorimeters will be used. The calorimetric approach eliminates systematic uncertainties arising from the use of an external beta source, and minimizes the effect of the atomic de-excitation process. The commissioning of the first implanted sub-array is scheduled for the end of 2018. It will provide useful data about the EC decay of Ho-163 together with a first limit on nu mass.
Published: 2019

27. The HOLMES experiment: Status and perspective

Author: Alpert, B, Balata, M, Becker, D, Bennett, D, Biasotti, M, Ceriale, V, de Gerone, M, Dressler, R, Faverzani, M, Ferri, E, Fowler, J, Gallucci, G, Gard, J, Gatti, F, Giachero, A, Hays-Wehle, J, Heinitz, S, Hilton, G, Koster, U, Lusignoli, M, Mates, J, Nisi, S, Nucciotti, A, Orlando, A, Pessina, G, Puiu, A, Ragazzi, S, Reintsema, C, Ribeiro-Gomes, M, Schmidt, D, Schumann, D, Swetz, D, Ullom, J, Vale, L, Alpert B., Balata M., Becker D., Bennett D., Biasotti M., Ceriale V., de Gerone M., Dressler R., Faverzani M., Ferri E., Fowler J., Gallucci G., Gard J., Gatti F., Giachero A., Hays-Wehle J., Heinitz S., Hilton G., Koster U., Lusignoli M., Mates J., Nisi S., Nucciotti A., Orlando A., Pessina G., Puiu A., Ragazzi S., Reintsema C., Ribeiro-Gomes M., Schmidt D., Schumann D., Swetz D., Ullom J., Vale L., Alpert, B, Balata, M, Becker, D, Bennett, D, Biasotti, M, Ceriale, V, de Gerone, M, Dressler, R, Faverzani, M, Ferri, E, Fowler, J, Gallucci, G, Gard, J, Gatti, F, Giachero, A, Hays-Wehle, J, Heinitz, S, Hilton, G, Koster, U, Lusignoli, M, Mates, J, Nisi, S, Nucciotti, A, Orlando, A, Pessina, G, Puiu, A, Ragazzi, S, Reintsema, C, Ribeiro-Gomes, M, Schmidt, D, Schumann, D, Swetz, D, Ullom, J, Vale, L, Alpert B., Balata M., Becker D., Bennett D., Biasotti M., Ceriale V., de Gerone M., Dressler R., Faverzani M., Ferri E., Fowler J., Gallucci G., Gard J., Gatti F., Giachero A., Hays-Wehle J., Heinitz S., Hilton G., Koster U., Lusignoli M., Mates J., Nisi S., Nucciotti A., Orlando A., Pessina G., Puiu A., Ragazzi S., Reintsema C., Ribeiro-Gomes M., Schmidt D., Schumann D., Swetz D., Ullom J., and Vale L.
Abstract: One of the most crucial challenges in today particle physics and cosmology is the determination of the neutrino absolute mass scale. Currently, the only model independent method to set a limit neutrino mass is the study of the nuclear beta spectrum end-point. Performing a calorimetric measurement of the end point of the Electron Capture decay spectrum of 163Ho, the HOLMES experiment aims at pushing down the sensitivity on the smallest neutrino mass at the order of ∼ eV. In its final configuration HOLMES will deploy an array of 1000 microcalorimeters based on Transition Edge Sensors with gold absorbers in which the 163Ho will be ion implanted with a target activity of 300 Hz/det. In order to achieve a statistical sensitivity on the neutrino mass in the eV range, there are stringent requirements on the detector performances: fast time resolution (∼ 1 µs) to solve pile-up events and an energy resolution of few eV at the Q-value (2.8 keV). Furthermore, the detectors must be multiplexable. The best technique to easily readout such a number of detector with a common readout line is the microwave frequency domain readout. We outline the HOLMES project with its physics reach and technical challenges together with its status and perspectives. In detail, we report the status of HOLMES activities concerning the 163Ho isotope production, the TES and multiplexed array read-out and the isotope embedding process.
Published: 2018

28. Status of the HOLMES Experiment to Directly Measure the Neutrino Mass

Author: Nucciotti, A, Alpert, B, Balata, M, Becker, D, Bennett, D, Bevilacqua, A, Biasotti, M, Ceriale, V, Ceruti, G, Corsini, D, De Gerone, M, Dressler, R, Faverzani, M, Ferri, E, Fowler, J, Gallucci, G, Gard, J, Gatti, F, Giachero, A, Hays-Wehle, J, Heinitz, S, Hilton, G, Köster, U, Lusignoli, M, Mates, J, Nisi, S, Orlando, A, Parodi, L, Pessina, G, Puiu, A, Ragazzi, S, Reintsema, C, Ribeiro-Gomez, M, Schmidt, D, Schuman, D, Siccardi, F, Swetz, D, Ullom, J, Vale, L, Nucciotti, A., Alpert, B., Balata, M., Becker, D., Bennett, D., Bevilacqua, A., Biasotti, M., Ceriale, V., Ceruti, G., Corsini, D., De Gerone, M., Dressler, R., Faverzani, M., Ferri, E., Fowler, J., Gallucci, G., Gard, J., Gatti, F., Giachero, A., Hays-Wehle, J., Heinitz, S., Hilton, G., Köster, U., Lusignoli, M., Mates, J., Nisi, S., Orlando, A., Parodi, L., Pessina, G., Puiu, A., Ragazzi, S., Reintsema, C., Ribeiro-Gomez, M., Schmidt, D., Schuman, D., Siccardi, F., Swetz, D., Ullom, J., Vale, L., Nucciotti, A, Alpert, B, Balata, M, Becker, D, Bennett, D, Bevilacqua, A, Biasotti, M, Ceriale, V, Ceruti, G, Corsini, D, De Gerone, M, Dressler, R, Faverzani, M, Ferri, E, Fowler, J, Gallucci, G, Gard, J, Gatti, F, Giachero, A, Hays-Wehle, J, Heinitz, S, Hilton, G, Köster, U, Lusignoli, M, Mates, J, Nisi, S, Orlando, A, Parodi, L, Pessina, G, Puiu, A, Ragazzi, S, Reintsema, C, Ribeiro-Gomez, M, Schmidt, D, Schuman, D, Siccardi, F, Swetz, D, Ullom, J, Vale, L, Nucciotti, A., Alpert, B., Balata, M., Becker, D., Bennett, D., Bevilacqua, A., Biasotti, M., Ceriale, V., Ceruti, G., Corsini, D., De Gerone, M., Dressler, R., Faverzani, M., Ferri, E., Fowler, J., Gallucci, G., Gard, J., Gatti, F., Giachero, A., Hays-Wehle, J., Heinitz, S., Hilton, G., Köster, U., Lusignoli, M., Mates, J., Nisi, S., Orlando, A., Parodi, L., Pessina, G., Puiu, A., Ragazzi, S., Reintsema, C., Ribeiro-Gomez, M., Schmidt, D., Schuman, D., Siccardi, F., Swetz, D., Ullom, J., and Vale, L.
Abstract: 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-independent measurement of the absolute scale of neutrino mass. HOLMES is an experiment funded by the European Research Council to directly measure the neutrino mass. HOLMES will perform a calorimetric measurement of the energy released in the electron capture decay of the artificial isotope163Ho. In a calorimetric measurement, the energy released in the decay process is entirely contained into the detector, except for the fraction taken away by the neutrino. This approach eliminates both the issues related to the use of an external source and the systematic uncertainties arising from decays on excited final states. The most suitable detectors for this type of measurement are low-temperature thermal detectors, where all the energy released into an absorber is converted into a temperature increase that can be measured by a sensitive thermometer directly coupled with the absorber. This measurement was originally proposed by De Rujula and Lusignoli (Nucl Phys B 219:277, 1983. https://doi.org/10.1016/0550-3213(83)90642-9), but only in the last decade the technological progress in detectors development has allowed to design a sensitive experiment. HOLMES plans to deploy a large array of low-temperature microcalorimeters with implanted163Ho nuclei. In this contribution we outline the HOLMES project with its physics reach and technical challenges, along with its status and perspectives
Published: 2018

29. Two-body nonleptonic decays ofD mesons

Author: Buccella, F., Lusignoli, M., Miele, G., and Pugliese, A.
Published: 1992
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30. B c decays

Author: Lusignoli, M. and Masetti, M.
Published: 1991
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31. Probing the absolute neutrino mass scale with the 163Ho: the HOLMES project

Author: Gerone, M De, primary, Alpert, B, additional, Becker, D, additional, Bennett, D, additional, Biasotti, M, additional, Ceriale, V, additional, Dressier, R, additional, Faverzani, M, additional, Ferri, E, additional, Fowler, J, additional, Gallucci, G, additional, Gard, J, additional, Gatti, F, additional, Giachero, A, additional, Hays-Wehle, J, additional, Heinitz, S, additional, Hilton, G, additional, Koester, U, additional, Lusignoli, M, additional, Mates, J, additional, Nisi, S, additional, Orlando, A, additional, Pessina, G, additional, Puiu, A, additional, Ragazzi, S, additional, Reintsema, C, additional, Ribeiro-Gomes, M, additional, Schmidt, D, additional, Schumann, D, additional, Swetz, D, additional, Ullom, J, additional, and Vale, L, additional
Published: 2020
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32. Status of the HOLMES Experiment to Directly Measure the Neutrino Mass

Author: Nucciotti, A., primary, Alpert, B., additional, Balata, M., additional, Becker, D., additional, Bennett, D., additional, Bevilacqua, A., additional, Biasotti, M., additional, Ceriale, V., additional, Ceruti, G., additional, Corsini, D., additional, De Gerone, M., additional, Dressler, R., additional, Faverzani, M., additional, Ferri, E., additional, Fowler, J., additional, Gallucci, G., additional, Gard, J., additional, Gatti, F., additional, Giachero, A., additional, Hays-Wehle, J., additional, Heinitz, S., additional, Hilton, G., additional, Köster, U., additional, Lusignoli, M., additional, Mates, J., additional, Nisi, S., additional, Orlando, A., additional, Parodi, L., additional, Pessina, G., additional, Puiu, A., additional, Ragazzi, S., additional, Reintsema, C., additional, Ribeiro-Gomez, M., additional, Schmidt, D., additional, Schuman, D., additional, Siccardi, F., additional, Swetz, D., additional, Ullom, J., additional, and Vale, L., additional
Published: 2018
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33. Direct neutrino mass measurement by the HOLMES experiment

Author: Nucciotti, A, primary, Alpert, B, additional, Balata, M, additional, Becker, D, additional, Bennett, D, additional, Bevilacqua, A, additional, Biasotti, M, additional, Ceriale, V, additional, Ceruti, G, additional, Corsini, D, additional, De Gerone, M, additional, Dressler, R, additional, Faverzani, M, additional, Ferri, E, additional, Fowler, J, additional, Gard, J, additional, Gatti, F, additional, Giachero, A, additional, Hays-Wehle, J, additional, Heinitz, S, additional, Hilton, G, additional, Köster, U, additional, Lusignoli, M, additional, Mates, J, additional, Nisi, S, additional, Orlando, A, additional, Parodi, L, additional, Pessina, G, additional, Puiu, A, additional, Ragazzi, S, additional, Reintsema, C, additional, Ribeiro-Gomez, M, additional, Schmidt, D, additional, Schuman, D, additional, Siccardi, F, additional, Swetz, D, additional, Ullom, J, additional, and Vale, L, additional
Published: 2018
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34. HOLMES

Author: Alpert, B., Balata, M., Bennett, D., Biasotti, M., Boragno, C., Brofferio, C., Ceriale, V., Corsini, D., Day, P. K., De Gerone, M., Dressler, R., Faverzani, M., Ferri, E., Fowler, J., Gatti, F., Giachero, A., Hays-Wehle, J., Heinitz, S., Hilton, G., Köster, U., Lusignoli, M., Maino, M., Mates, J., Nisi, S., Nizzolo, R., Nucciotti, A., Pessina, G., Pizzigoni, G., Puiu, A., Ragazzi, S., Reintsema, C., Gomes, M. Ribeiro, Schmidt, D., Schumann, D., Sisti, M., Swetz, D., Terranova, F., and Ullom, J.
Subjects: Physics and Astronomy (miscellaneous), Regular Article - Experimental Physics, Engineering (miscellaneous)
Abstract: 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 \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^{163}$$\end{document}163Ho. The calorimetric measurement eliminates systematic uncertainties arising from the use of external beta sources, as in experiments with beta spectrometers. This measurement was proposed in 1982 by A. De Rujula and M. Lusignoli, but only recently the detector technological progress allowed to design a sensitive experiment. HOLMES will deploy a large array of low temperature microcalorimeters with implanted \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^{163}$$\end{document}163Ho nuclei. The resulting mass sensitivity will be as low as 0.4 eV. HOLMES will be an important step forward in the direct neutrino mass measurement with a calorimetric approach as an alternative to spectrometry. It will also establish the potential of this approach to extend the sensitivity down to 0.1 eV. We outline here the project with its technical challenges and perspectives.
Published: 2015

35. Measuring the electron neutrino mass with improved sensitivity: the HOLMES experiment

Author: Giachero, A, Alpert, B, Becker, D, Bennett, D, Biasotti, M, Brofferio, C, Ceriale, V, Ceruti, G, Corsini, D, Day, P, Gerone, M, Dressler, R, Faverzani, M, Ferri, E, Fowler, J, Fumagalli, E, Gallucci, G, Gard, J, Gatti, F, Hays Wehle, J, Heinitz, S, Hilton, G, Köster, U, Lusignoli, M, Mates, J, Nisi, S, Nucciotti, A, Orlando, A, Parodi, L, Pessina, G, Pizzigoni, G, Puiu, P, Ragazzi, S, Reintsema, C, Gomes, M, Schmidt, D, Schumann, D, Siccardi, F, Sisti, M, Swetz, D, Terranova, F, Ullom, J, Vale, L, GIACHERO, ANDREA, BROFFERIO, CHIARA, DAY, PETER KENNETH, FAVERZANI, MARCO, FERRI, ELENA, NUCCIOTTI, ANGELO ENRICO LODOVICO, PESSINA, GIANLUIGI EZIO, PUIU, PAUL ANDREI, RAGAZZI, STEFANO, SISTI, MONICA, TERRANOVA, FRANCESCO, Vale, L., Giachero, A, Alpert, B, Becker, D, Bennett, D, Biasotti, M, Brofferio, C, Ceriale, V, Ceruti, G, Corsini, D, Day, P, Gerone, M, Dressler, R, Faverzani, M, Ferri, E, Fowler, J, Fumagalli, E, Gallucci, G, Gard, J, Gatti, F, Hays Wehle, J, Heinitz, S, Hilton, G, Köster, U, Lusignoli, M, Mates, J, Nisi, S, Nucciotti, A, Orlando, A, Parodi, L, Pessina, G, Pizzigoni, G, Puiu, P, Ragazzi, S, Reintsema, C, Gomes, M, Schmidt, D, Schumann, D, Siccardi, F, Sisti, M, Swetz, D, Terranova, F, Ullom, J, Vale, L, GIACHERO, ANDREA, BROFFERIO, CHIARA, DAY, PETER KENNETH, FAVERZANI, MARCO, FERRI, ELENA, NUCCIOTTI, ANGELO ENRICO LODOVICO, PESSINA, GIANLUIGI EZIO, PUIU, PAUL ANDREI, RAGAZZI, STEFANO, SISTI, MONICA, TERRANOVA, FRANCESCO, and Vale, L.
Abstract: 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 163Ho. The calorimetric measurement eliminates systematic uncertainties arising from the use of external beta sources, as in experiments with spectrometers. This measurement was proposed in 1982 by A. De Rujula and M. Lusignoli, but only recently the detector technological progress has allowed to design a sensitive experiment. HOLMES will deploy a 1000 pixels array of low temperature microcalorimeters with implanted 163Ho nuclei. HOLMES, besides being an important step forward in the direct neutrino mass measurement with a calorimetric approach, will also establish the potential of this approach to extend the sensitivity down to 0.1 eV and lower. The detectors used for the HOLMES experiment will be Mo/Cu bilayers TESs (Transition Edge Sensors) on SiNx membrane with gold absorbers. Microwave multiplexed rf-SQUIDs are the best available technique to read out large array of such detectors. An extensive R&D activity is in progress in order to maximize the multiplexing factor while preserving the performances of the individual detectors. To embed the 163Ho into the gold absorbers a custom mass separator ion implanter is being developed. The current activities are focused on the the single detector performances optimization and on the 163Ho isotope production and embedding. A preliminary measurement of a sub-array of 4× 16 detectors is planned late in 2017. In this contribution we present the HOLMES project with its technical challenges, its status and perspectives.
Published: 2017

36. A Unified Gauge Theory Without µ-e Universality

Author: Buccella, F., Lusignoli, M., Pugliese, A., and Urban, Paul, editor
Published: 1978
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37. Measuring the electron neutrino mass with improved sensitivity: the HOLMES experiment

Author: Giachero, A., primary, Alpert, B.K., additional, Becker, D.T., additional, Bennett, D.A., additional, Biasotti, M., additional, Brofferio, C., additional, Ceriale, V., additional, Ceruti, G., additional, Corsini, D., additional, Day, P.K., additional, Gerone, M. De, additional, Dressler, R., additional, Faverzani, M., additional, Ferri, E., additional, Fowler, J.W., additional, Fumagalli, E., additional, Gallucci, G., additional, Gard, J.D., additional, Gatti, F., additional, Hays-Wehle, J.P., additional, Heinitz, S., additional, Hilton, G.C., additional, Köster, U., additional, Lusignoli, M., additional, Mates, J.A.B., additional, Nisi, S., additional, Nucciotti, A., additional, Orlando, A., additional, Parodi, L., additional, Pessina, G., additional, Pizzigoni, G., additional, Puiu, A., additional, Ragazzi, S., additional, Reintsema, C.D., additional, Gomes, M. Ribeiro, additional, Schmidt, D.R., additional, Schumann, D., additional, Siccardi, F., additional, Sisti, M., additional, Swetz, D.S., additional, Terranova, F., additional, Ullom, J.N., additional, and Vale, L.R., additional
Published: 2017
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38. The HOLMES Experiment

Author: Faverzani, M, Alpert, B, Backer, D, Bennet, D, Biasotti, M, Brofferio, C, Ceriale, V, Ceruti, G, Corsini, D, Day, P, De Gerone, M, Dressler, R, Ferri, E, Fowler, J, Fumagalli, E, Gard, J, Gatti, F, Giachero, A, Hays Wehle, J, Heinitz, S, Hilton, G, Köster, U, Lusignoli, M, Maino, M, Mates, J, Nisi, S, Nizzolo, R, Nucciotti, A, Orlando, A, Parodi, L, Pessina, G, Pizzigoni, G, Puiu, P, Ragazzi, S, Reintsema, C, Ribeiro Gomez, M, Schmidt, D, Schuman, D, Siccardi, F, Sisti, M, Swetz, D, Terranova, F, Ullom, J, Vale, L, FAVERZANI, MARCO, BROFFERIO, CHIARA, DAY, PETER KENNETH, FERRI, ELENA, GIACHERO, ANDREA, MAINO, MATTEO, NUCCIOTTI, ANGELO ENRICO LODOVICO, PESSINA, GIANLUIGI EZIO, PUIU, PAUL ANDREI, RAGAZZI, STEFANO, SISTI, MONICA, TERRANOVA, FRANCESCO, Vale, L., Faverzani, M, Alpert, B, Backer, D, Bennet, D, Biasotti, M, Brofferio, C, Ceriale, V, Ceruti, G, Corsini, D, Day, P, De Gerone, M, Dressler, R, Ferri, E, Fowler, J, Fumagalli, E, Gard, J, Gatti, F, Giachero, A, Hays Wehle, J, Heinitz, S, Hilton, G, Köster, U, Lusignoli, M, Maino, M, Mates, J, Nisi, S, Nizzolo, R, Nucciotti, A, Orlando, A, Parodi, L, Pessina, G, Pizzigoni, G, Puiu, P, Ragazzi, S, Reintsema, C, Ribeiro Gomez, M, Schmidt, D, Schuman, D, Siccardi, F, Sisti, M, Swetz, D, Terranova, F, Ullom, J, Vale, L, FAVERZANI, MARCO, BROFFERIO, CHIARA, DAY, PETER KENNETH, FERRI, ELENA, GIACHERO, ANDREA, MAINO, MATTEO, NUCCIOTTI, ANGELO ENRICO LODOVICO, PESSINA, GIANLUIGI EZIO, PUIU, PAUL ANDREI, RAGAZZI, STEFANO, SISTI, MONICA, TERRANOVA, FRANCESCO, and Vale, L.
Abstract: The determination of the neutrino mass is an open issue in modern particle physics and astrophysics. The direct mass measurement is the only theory-unrelated experimental tool capable to probe such quantity. The HOLMES experiment will measure the end-point energy of the electron capture decay of 163Ho, aiming at a statistical sensitivity on the neutrino mass around 1 eV/c2. In order to acquire the large needed statistics by keeping the pile-up contribution as low as possible, 1000 transition edge sensors will be readout simultaneously with the frequency domain readout, a multiplexing technique where the multiplex factor is only limited by the bandwidth of the available commercial fast digitizers. We outline here the HOLMES project with its technical challenges, and its status and perspectives.
Published: 2016