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Title: The CUPID-Mo experiment for neutrinoless double-beta decay: performance and prospects

Abstract

CUPID-Mo is a bolometric experiment to search for neutrinoless double-beta decay ($$0\nu\beta\beta$$) of $$^{100}$$Mo. In this article, we detail the CUPID-Mo detector concept, assembly, installation in the underground laboratory in Modane in 2018, and provide results from the first datasets. The demonstrator consists of an array of 20 scintillating bolometers comprised of $$^{100}$$Mo-enriched 0.2 kg Li$$_2$$MoO$$_4$$ crystals. The detectors are complemented by 20 thin cryogenic Ge bolometers acting as light detectors to distinguish $$\alpha$$ from $$\gamma$$/$$\beta$$ events by the detection of both heat and scintillation light signals. We observe good detector uniformity, facilitating the operation of a large detector array as well as excellent energy resolution of 5.3 keV (6.5 keV) FWHM at 2615 keV, in calibration (physics) data. Based on the observed energy resolutions and light yields a separation of $$\alpha$$ particles at much better than 99.9\% with equally high acceptance for $$\gamma$$/$$\beta$$ events is expected for events in the region of interest for $$^{100}$$Mo $$0\nu\beta\beta$$. We present limits on the crystals' radiopurity ($$\leq$$3 $$\mu$$Bq/kg of $$^{226}$$Ra and $$\leq$$2 $$\mu$$Bq/kg of $$^{232}$$Th). Based on these initial results we also discuss a sensitivity study for the science reach of the CUPID-Mo experiment, in particular, the ability to set the most stringent half-life limit on the $$^{100}$$Mo $$0\nu\beta\beta$$ decay after half a year of livetime. In conclusion, the achieved results show that CUPID-Mo is a successful demonstrator of the technology - developed in the framework of the LUMINEU project - selected for the CUPID experiment, a proposed follow-up of CUORE, the currently running first tonne-scale cryogenic $$0\nu\beta\beta$$ experiment.

Authors:
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Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
Contributing Org.:
CUPID Collaboration
OSTI Identifier:
1564076
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
European Physical Journal. C, Particles and Fields
Additional Journal Information:
Journal Volume: 80; Journal Issue: 1; Journal ID: ISSN 1434-6044
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Double-beta decay; Cryogenic detector; Scintillating bolometer; Scintillator; Enriched materials; 100Mo; Lithium molybdate; High performance; Particle identification; Radiopurity; Low background

Citation Formats

Armengaud, E., Augier, C., Barabash, A. S., Bellini, F., Benato, G., Benoît, A., Beretta, M., Bergé, L., Billard, J., Borovlev, Yu. A., Bourgeois, Ch., Briere, M., Brudanin, V. B., Camus, P., Cardani, L., Casali, N., Cazes, A., Chapellier, M., Charlieux, F., de Combarieu, M., Dafinei, I., Danevich, F. A., De Jesus, M., Dumoulin, L., Eitel, K., Elkhoury, E., Ferri, F., Fujikawa, B. K., Gascon, J., Gironi, L., Giuliani, A., Grigorieva, V. D., Gros, M., Guerard, E., Helis, D. L., Huang, H. Z., Huang, R., Johnston, J., Juillard, A., Khalife, H., Kleifges, M., Kobychev, V. V., Kolomensky, Yu. G., Konovalov, S. I., Leder, A., Loaiza, P., Ma, L., Makarov, E. P., de Marcillac, P., Marini, L., Marnieros, S., Misiak, D., Navick, X. -F., Novati, V., Olivieri, E., Ouellet, J. L., Pagnanini, L., Pari, P., Pattavina, L., Paul, B., Pavan, M., Peng, H., Pessina, G., Pirro, S., Poda, D. V., Polischuk, O. G., Previtali, E., Redon, Th., Rozov, S., Rusconi, C., Sanglard, V., Schäffner, K., Schmidt, B., Shen, Y., Shlegel, V. N., Siebenborn, B., Singh, V., Sorbino, S., Tomei, C., Tretyak, V. I., Umatov, V. I., Vagneron, L., Velázquez, M., Weber, M., Welliver, B., Winslow, L., Xue, M., Yakushev, E., and Zolotarova, A. S. The CUPID-Mo experiment for neutrinoless double-beta decay: performance and prospects. United States: N. p., 2020. Web. https://doi.org/10.1140/epjc/s10052-019-7578-6.
Armengaud, E., Augier, C., Barabash, A. S., Bellini, F., Benato, G., Benoît, A., Beretta, M., Bergé, L., Billard, J., Borovlev, Yu. A., Bourgeois, Ch., Briere, M., Brudanin, V. B., Camus, P., Cardani, L., Casali, N., Cazes, A., Chapellier, M., Charlieux, F., de Combarieu, M., Dafinei, I., Danevich, F. A., De Jesus, M., Dumoulin, L., Eitel, K., Elkhoury, E., Ferri, F., Fujikawa, B. K., Gascon, J., Gironi, L., Giuliani, A., Grigorieva, V. D., Gros, M., Guerard, E., Helis, D. L., Huang, H. Z., Huang, R., Johnston, J., Juillard, A., Khalife, H., Kleifges, M., Kobychev, V. V., Kolomensky, Yu. G., Konovalov, S. I., Leder, A., Loaiza, P., Ma, L., Makarov, E. P., de Marcillac, P., Marini, L., Marnieros, S., Misiak, D., Navick, X. -F., Novati, V., Olivieri, E., Ouellet, J. L., Pagnanini, L., Pari, P., Pattavina, L., Paul, B., Pavan, M., Peng, H., Pessina, G., Pirro, S., Poda, D. V., Polischuk, O. G., Previtali, E., Redon, Th., Rozov, S., Rusconi, C., Sanglard, V., Schäffner, K., Schmidt, B., Shen, Y., Shlegel, V. N., Siebenborn, B., Singh, V., Sorbino, S., Tomei, C., Tretyak, V. I., Umatov, V. I., Vagneron, L., Velázquez, M., Weber, M., Welliver, B., Winslow, L., Xue, M., Yakushev, E., & Zolotarova, A. S. The CUPID-Mo experiment for neutrinoless double-beta decay: performance and prospects. United States. https://doi.org/10.1140/epjc/s10052-019-7578-6
Armengaud, E., Augier, C., Barabash, A. S., Bellini, F., Benato, G., Benoît, A., Beretta, M., Bergé, L., Billard, J., Borovlev, Yu. A., Bourgeois, Ch., Briere, M., Brudanin, V. B., Camus, P., Cardani, L., Casali, N., Cazes, A., Chapellier, M., Charlieux, F., de Combarieu, M., Dafinei, I., Danevich, F. A., De Jesus, M., Dumoulin, L., Eitel, K., Elkhoury, E., Ferri, F., Fujikawa, B. K., Gascon, J., Gironi, L., Giuliani, A., Grigorieva, V. D., Gros, M., Guerard, E., Helis, D. L., Huang, H. Z., Huang, R., Johnston, J., Juillard, A., Khalife, H., Kleifges, M., Kobychev, V. V., Kolomensky, Yu. G., Konovalov, S. I., Leder, A., Loaiza, P., Ma, L., Makarov, E. P., de Marcillac, P., Marini, L., Marnieros, S., Misiak, D., Navick, X. -F., Novati, V., Olivieri, E., Ouellet, J. L., Pagnanini, L., Pari, P., Pattavina, L., Paul, B., Pavan, M., Peng, H., Pessina, G., Pirro, S., Poda, D. V., Polischuk, O. G., Previtali, E., Redon, Th., Rozov, S., Rusconi, C., Sanglard, V., Schäffner, K., Schmidt, B., Shen, Y., Shlegel, V. N., Siebenborn, B., Singh, V., Sorbino, S., Tomei, C., Tretyak, V. I., Umatov, V. I., Vagneron, L., Velázquez, M., Weber, M., Welliver, B., Winslow, L., Xue, M., Yakushev, E., and Zolotarova, A. S. Wed . "The CUPID-Mo experiment for neutrinoless double-beta decay: performance and prospects". United States. https://doi.org/10.1140/epjc/s10052-019-7578-6. https://www.osti.gov/servlets/purl/1564076.
@article{osti_1564076,
title = {The CUPID-Mo experiment for neutrinoless double-beta decay: performance and prospects},
author = {Armengaud, E. and Augier, C. and Barabash, A. S. and Bellini, F. and Benato, G. and Benoît, A. and Beretta, M. and Bergé, L. and Billard, J. and Borovlev, Yu. A. and Bourgeois, Ch. and Briere, M. and Brudanin, V. B. and Camus, P. and Cardani, L. and Casali, N. and Cazes, A. and Chapellier, M. and Charlieux, F. and de Combarieu, M. and Dafinei, I. and Danevich, F. A. and De Jesus, M. and Dumoulin, L. and Eitel, K. and Elkhoury, E. and Ferri, F. and Fujikawa, B. K. and Gascon, J. and Gironi, L. and Giuliani, A. and Grigorieva, V. D. and Gros, M. and Guerard, E. and Helis, D. L. and Huang, H. Z. and Huang, R. and Johnston, J. and Juillard, A. and Khalife, H. and Kleifges, M. and Kobychev, V. V. and Kolomensky, Yu. G. and Konovalov, S. I. and Leder, A. and Loaiza, P. and Ma, L. and Makarov, E. P. and de Marcillac, P. and Marini, L. and Marnieros, S. and Misiak, D. and Navick, X. -F. and Nones, C. and Novati, V. and Olivieri, E. and Ouellet, J. L. and Pagnanini, L. and Pari, P. and Pattavina, L. and Paul, B. and Pavan, M. and Peng, H. and Pessina, G. and Pirro, S. and Poda, D. V. and Polischuk, O. G. and Previtali, E. and Redon, Th. and Rozov, S. and Rusconi, C. and Sanglard, V. and Schäffner, K. and Schmidt, B. and Shen, Y. and Shlegel, V. N. and Siebenborn, B. and Singh, V. and Sorbino, S. and Tomei, C. and Tretyak, V. I. and Umatov, V. I. and Vagneron, L. and Velázquez, M. and Weber, M. and Welliver, B. and Winslow, L. and Xue, M. and Yakushev, E. and Zolotarova, A. S.},
abstractNote = {CUPID-Mo is a bolometric experiment to search for neutrinoless double-beta decay ($0\nu\beta\beta$) of $^{100}$Mo. In this article, we detail the CUPID-Mo detector concept, assembly, installation in the underground laboratory in Modane in 2018, and provide results from the first datasets. The demonstrator consists of an array of 20 scintillating bolometers comprised of $^{100}$Mo-enriched 0.2 kg Li$_2$MoO$_4$ crystals. The detectors are complemented by 20 thin cryogenic Ge bolometers acting as light detectors to distinguish $\alpha$ from $\gamma$/$\beta$ events by the detection of both heat and scintillation light signals. We observe good detector uniformity, facilitating the operation of a large detector array as well as excellent energy resolution of 5.3 keV (6.5 keV) FWHM at 2615 keV, in calibration (physics) data. Based on the observed energy resolutions and light yields a separation of $\alpha$ particles at much better than 99.9\% with equally high acceptance for $\gamma$/$\beta$ events is expected for events in the region of interest for $^{100}$Mo $0\nu\beta\beta$. We present limits on the crystals' radiopurity ($\leq$3 $\mu$Bq/kg of $^{226}$Ra and $\leq$2 $\mu$Bq/kg of $^{232}$Th). Based on these initial results we also discuss a sensitivity study for the science reach of the CUPID-Mo experiment, in particular, the ability to set the most stringent half-life limit on the $^{100}$Mo $0\nu\beta\beta$ decay after half a year of livetime. In conclusion, the achieved results show that CUPID-Mo is a successful demonstrator of the technology - developed in the framework of the LUMINEU project - selected for the CUPID experiment, a proposed follow-up of CUORE, the currently running first tonne-scale cryogenic $0\nu\beta\beta$ experiment.},
doi = {10.1140/epjc/s10052-019-7578-6},
journal = {European Physical Journal. C, Particles and Fields},
number = 1,
volume = 80,
place = {United States},
year = {2020},
month = {1}
}

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