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arXiv · 1911.10426

First data from the CUPID-Mo neutrinoless double beta decay experiment

B. Schmidt·E. Armengaud·C. Augier·A. S. Barabash·F. Bellini·G. Benato·A. Benoît·M. Beretta·L. Bergé·J. Billard·Yu. A. Borovlev·Ch. Bourgeois·M. Briere·V. B. Brudanin·P. Camus·L. Cardani·N. Casali·A. Cazes·M. Chapellier·F. Charlieux·M. de Combarieu·I. Dafinei·F. A. Danevich·M. De Jesus·L. Dumoulin·K. Eitel·E. Elkhoury·F. Ferri·B. K. Fujikawa·J. Gascon·L. Gironi·A. Giuliani·V. D. Grigorieva·M. Gros·E. Guerard·D. L. Helis·H. Z. Huang·R. Huang·J. Johnston·A. Juillard·H. Khalife·M. Kleifges·V. V. Kobychev·Yu. G. Kolomensky·S. I. Konovalov·A. Leder·P. Loaiza·L. Ma·E. P. Makarov·P. de Marcillac·L. Marini·S. Marnieros·D. Misiak·X. -F. Navick·C. Nones·V. Novati·E. Olivieri·J. L. Ouellet·L. Pagnanini·P. Pari·L. Pattavina·B. Paul·M. Pavan·H. Peng·G. Pessina·S. Pirro·D. V. Poda·O. G. Polischuk·E. Previtali·Th. Redon·S. Rozov·C. Rusconi·V. Sanglard·K. Schäffner·Y. Shen·V. N. Shlegel·B. Siebenborn·V. Singh·S. Sorbino·C. Tomei·V. I. Tretyak·V. I. Umatov·L. Vagneron·M. Velázquez·M. Weber·B. Welliver·L. Winslow·M. Xue·E. Yakushev·A. S. Zolotarova
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Abstract

The CUPID-Mo experiment is searching for neutrinoless double beta decay in $^{100}$Mo, evaluating the technology of cryogenic scintillating Li$_{2}^{100}$MoO$_4$ detectors for CUPID (CUORE Upgrade with Particle ID). CUPID-Mo detectors feature background suppression using a dual-readout scheme with Li$_{2}$MoO$_4$ crystals complemented by Ge bolometers for light detection. The detection of both heat and scintillation light signals allows the efficient discrimination of $\alpha$ from $\gamma$&$\beta$ events. In this proceedings, we discuss results from the first 2 months of data taking in spring 2019. In addition to an excellent bolometric performance of 6.7$\,$keV (FWHM) at 2615$\,$keV and an $\alpha$ separation of better than 99.9\% for all detectors, we report on bulk radiopurity for Th and U. Finally, we interpret the accumulated physics data in terms of a limit of $T_{1/2}^{0\nu}\,> 3\times10^{23}\,$yr for $^{100}$Mo and discuss the sensitivity of CUPID-Mo until the expected end of physics data taking in early 2020.

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B. Schmidt, E. Armengaud, C. Augier, A. S. Barabash, F. Bellini, G. Benato, A. Benoît, M. Beretta, L. Bergé, J. Billard, Yu. A. Borovlev, Ch. Bourgeois, M. Briere, V. B. Brudanin, P. Camus, L. Cardani, N. Casali, A. Cazes, M. Chapellier, F. Charlieux, M. de Combarieu, I. Dafinei, F. A. Danevich, M. De Jesus, L. Dumoulin, K. Eitel, E. Elkhoury, F. Ferri, B. K. Fujikawa, J. Gascon, L. Gironi, A. Giuliani, V. D. Grigorieva, M. Gros, E. Guerard, D. L. Helis, H. Z. Huang, R. Huang, J. Johnston, A. Juillard, H. Khalife, M. Kleifges, V. V. Kobychev, Yu. G. Kolomensky, S. I. Konovalov, A. Leder, P. Loaiza, L. Ma, E. P. Makarov, P. de Marcillac, L. Marini, S. Marnieros, D. Misiak, X. -F. Navick, C. Nones, V. Novati, E. Olivieri, J. L. Ouellet, L. Pagnanini, P. Pari, L. Pattavina, B. Paul, M. Pavan, H. Peng, G. Pessina, S. Pirro, D. V. Poda, O. G. Polischuk, E. Previtali, Th. Redon, S. Rozov, C. Rusconi, V. Sanglard, K. Schäffner, Y. Shen, V. N. Shlegel, B. Siebenborn, V. Singh, S. Sorbino, C. Tomei, V. I. Tretyak, V. I. Umatov, L. Vagneron, M. Velázquez, M. Weber, B. Welliver, L. Winslow, M. Xue, E. Yakushev, A. S. Zolotarova. 2019-11-23. First data from the CUPID-Mo neutrinoless double beta decay experiment. https://doi.org/10.1088/1742-6596%2F1468%2F1%2F012129

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