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Title: TeO$$_2$$ bolometers with Cherenkov signal tagging: towards next-generation neutrinoless double-beta decay experiments

Abstract

CUORE, an array of 988 TeO$$_2$$ bolometers, is about to be one of the most sensitive experiments searching for neutrinoless double-beta decay. Its sensitivity could be further improved by removing the background from α radioactivity. A few years ago it was pointed out that the signal from βs can be tagged by detecting the emitted Cherenkov light, which is not produced by αs. In this paper we confirm this possibility. For the first time we measured the Cherenkov light emitted by a CUORE crystal, and found it to be 100 eV at the Q-value of the decay. To completely reject the α background, we compute that one needs light detectors with baseline noise below 20 eV RMS, a value which is 3–4 times smaller than the average noise of the bolometric light detectors we are using. We point out that an improved light detector technology must be developed to obtain TeO$$_2$$ bolometric experiments able to probe the inverted hierarchy of neutrino masses.

Authors:
 [1];  [2];  [3];  [2];  [2];  [4];  [5];  [2];  [6];  [7];  [4];  [8];  [9];  [2];  [8];  [9];  [8];  [4]
  1. INFN Lab. Nazionali del Gran Sasso, Assergi (Italy); Univ. degli studi dell' Aquila, Coppito (Italy)
  2. Sapienza Univ. di Roma, Rome (Italy); INFN Sezione di Roma, Rome (Italy)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. INFN Sezione di Roma, Rome (Italy)
  5. INFN Sezione di Genova, Genoa (Italy); Univ. di Genova, Genoa (Italy)
  6. INFN Sezione di Milano Bicocca, Milan (Italy); Univ. di Milano Bicocca, Milan (Italy)
  7. INFN Gran Sasso Science Institute, L'Aquila (Italy)
  8. INFN Lab. Nazionali del Gran Sasso, Assergi (Italy)
  9. INFN Sezione di Milano Bicocca, Milan (Italy)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1410321
Grant/Contract Number:
AC02-05CH11231
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
European Physical Journal. C, Particles and Fields
Additional Journal Information:
Journal Volume: 75; Journal Issue: 1; Journal ID: ISSN 1434-6044
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY

Citation Formats

Casali, N., Vignati, Marco, Beeman, J. W., Bellini, F., Cardani, L., Dafinei, I., Di Domizio, S., Ferroni, F., Gironi, L., Nagorny, S., Orio, F., Pattavina, L., Pessina, G., Piperno, G., Pirro, S., Rusconi, C., Schaffner, K., and Tomei, C. TeO$_2$ bolometers with Cherenkov signal tagging: towards next-generation neutrinoless double-beta decay experiments. United States: N. p., 2015. Web. doi:10.1140/epjc/s10052-014-3225-4.
Casali, N., Vignati, Marco, Beeman, J. W., Bellini, F., Cardani, L., Dafinei, I., Di Domizio, S., Ferroni, F., Gironi, L., Nagorny, S., Orio, F., Pattavina, L., Pessina, G., Piperno, G., Pirro, S., Rusconi, C., Schaffner, K., & Tomei, C. TeO$_2$ bolometers with Cherenkov signal tagging: towards next-generation neutrinoless double-beta decay experiments. United States. doi:10.1140/epjc/s10052-014-3225-4.
Casali, N., Vignati, Marco, Beeman, J. W., Bellini, F., Cardani, L., Dafinei, I., Di Domizio, S., Ferroni, F., Gironi, L., Nagorny, S., Orio, F., Pattavina, L., Pessina, G., Piperno, G., Pirro, S., Rusconi, C., Schaffner, K., and Tomei, C. Wed . "TeO$_2$ bolometers with Cherenkov signal tagging: towards next-generation neutrinoless double-beta decay experiments". United States. doi:10.1140/epjc/s10052-014-3225-4. https://www.osti.gov/servlets/purl/1410321.
@article{osti_1410321,
title = {TeO$_2$ bolometers with Cherenkov signal tagging: towards next-generation neutrinoless double-beta decay experiments},
author = {Casali, N. and Vignati, Marco and Beeman, J. W. and Bellini, F. and Cardani, L. and Dafinei, I. and Di Domizio, S. and Ferroni, F. and Gironi, L. and Nagorny, S. and Orio, F. and Pattavina, L. and Pessina, G. and Piperno, G. and Pirro, S. and Rusconi, C. and Schaffner, K. and Tomei, C.},
abstractNote = {CUORE, an array of 988 TeO$_2$ bolometers, is about to be one of the most sensitive experiments searching for neutrinoless double-beta decay. Its sensitivity could be further improved by removing the background from α radioactivity. A few years ago it was pointed out that the signal from βs can be tagged by detecting the emitted Cherenkov light, which is not produced by αs. In this paper we confirm this possibility. For the first time we measured the Cherenkov light emitted by a CUORE crystal, and found it to be 100 eV at the Q-value of the decay. To completely reject the α background, we compute that one needs light detectors with baseline noise below 20 eV RMS, a value which is 3–4 times smaller than the average noise of the bolometric light detectors we are using. We point out that an improved light detector technology must be developed to obtain TeO$_2$ bolometric experiments able to probe the inverted hierarchy of neutrino masses.},
doi = {10.1140/epjc/s10052-014-3225-4},
journal = {European Physical Journal. C, Particles and Fields},
number = 1,
volume = 75,
place = {United States},
year = {Wed Jan 14 00:00:00 EST 2015},
month = {Wed Jan 14 00:00:00 EST 2015}
}

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