https://doi.org/10.1140/epjc/s10052-017-5433-1
Regular Article - Experimental Physics
Low energy analysis techniques for CUORE
1
Department of Physics and Astronomy, University of South Carolina, Columbia, SC, 29208, USA
2
Department of Physics and Astronomy, University of California, Los Angeles, CA, 90095, USA
3
INFN-Laboratori Nazionali del Gran Sasso, Assergi, 67100, L’Aquila, Italy
4
INFN-Laboratori Nazionali di Legnaro, Legnaro, 35020, Padua, Italy
5
INFN-Sezione di Bologna, 40127, Bologna, Italy
6
Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
7
Dipartimento di Fisica, Sapienza Università di Roma, 00185, Rome, Italy
8
INFN-Sezione di Roma, 00185, Rome, Italy
9
Department of Physics, University of California, Berkeley, CA, 94720, USA
10
INFN-Sezione di Genova, 16146, Genoa, Italy
11
Dipartimento di Fisica, Università di Milano-Bicocca, 20126, Milan, Italy
12
INFN-Sezione di Milano Bicocca, 20126, Milan, Italy
13
INFN-Sezione di Padova, 35131, Padua, Italy
14
Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
15
Chinese Academy of Sciences, Shanghai Institute of Applied Physics, Shanghai, 201800, China
16
Dipartimento di Fisica, Università di Genova, 16146, Genoa, Italy
17
Department of Physics, Yale University, New Haven, CT, 06520, USA
18
Dipartimento di Ingegneria Civile e Meccanica, Università degli Studi di Cassino e del Lazio Meridionale, Cassino, 03043, Italy
19
INFN-Gran Sasso Science Institute, 67100, L’Aquila, Italy
20
Dipartimento di Scienze Fisiche e Chimiche, Università dell’Aquila, 67100, L’Aquila, Italy
21
Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
22
INFN-Laboratori Nazionali di Frascati, Frascati, 00044, Rome, Italy
23
CSNSM, Univ. Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, 91405, Orsay, France
24
Physics Department, California Polytechnic State University, San Luis Obispo, CA, 93407, USA
25
Department of Materials Science and Engineering, University of California, Berkeley, CA, 94720, USA
26
Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, 200240, China
27
Physics Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
28
Laboratorio de Fisica Nuclear y Astroparticulas, Universidad de Zaragoza, 50009, Saragossa, Spain
29
Dipartimento di Fisica e Astronomia, Alma Mater Studiorum–Università di Bologna, 40127, Bologna, Italy
30
Service de Physique des Particules, CEA/Saclay, 91191, Gif-sur-Yvette, France
31
Lawrence Livermore National Laboratory, Livermore, CA, 94550, USA
32
Department of Nuclear Engineering, University of California, Berkeley, CA, 94720, USA
33
Center for Neutrino Physics, Virginia Polytechnic Institute and State University, Blacksburg, VA, 24061, USA
34
Department of Physics, University of Wisconsin, Madison, WI, 53706, USA
35
SUPA, Institute for Astronomy, University of Edinburgh, Blackford Hill, Edinburgh, EH9 3HJ, UK
36
Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
* e-mail: cuore-spokesperson@lngs.infn.it
Received:
24
August
2017
Accepted:
30
November
2017
Published online:
12
December
2017
CUORE is a tonne-scale cryogenic detector operating at the Laboratori Nazionali del Gran Sasso (LNGS) that uses tellurium dioxide bolometers to search for neutrinoless double-beta decay of Te. CUORE is also suitable to search for low energy rare events such as solar axions or WIMP scattering, thanks to its ultra-low background and large target mass. However, to conduct such sensitive searches requires improving the energy threshold to 10 keV. In this paper, we describe the analysis techniques developed for the low energy analysis of CUORE-like detectors, using the data acquired from November 2013 to March 2015 by CUORE-0, a single-tower prototype designed to validate the assembly procedure and new cleaning techniques of CUORE. We explain the energy threshold optimization, continuous monitoring of the trigger efficiency, data and event selection, and energy calibration at low energies in detail. We also present the low energy background spectrum of CUORE-0 below
. Finally, we report the sensitivity of CUORE to WIMP annual modulation using the CUORE-0 energy threshold and background, as well as an estimate of the uncertainty on the nuclear quenching factor from nuclear recoils inCUORE-0.
© The Author(s), 2017