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

Journal Article · 31 January 2020 · Journal of Physics. Conference Series

DOI: https://doi.org/10.1088/1742-6596/1468/1/012129 · OSTI ID:1580996

Schmidt, B.

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.

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
• Contributing Organization: CUPID-Mo Collaboration
• Grant/Contract Number: AC02-05CH11231
• OSTI ID: 1580996
• Journal Information: Journal of Physics. Conference Series, Journal Name: Journal of Physics. Conference Series Vol. 1468; ISSN 1742-6588
• Publisher: IOP PublishingCopyright Statement
• Country of Publication: United States
• Language: English