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

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

N. Casali
(
- Gran Sasso and
- L'Aquila U.
)
,
M. Vignati
(
- Rome U. and
- INFN, Rome
)
,
J.W. Beeman
(
- LBL, Berkeley
)
,
F. Bellini
(
- Rome U. and
- INFN, Rome
)
,
L. Cardani
(
- Rome U. and
- INFN, Rome
)

Mar 21, 2014

5 pages

Published in:

Eur.Phys.J.C 75 (2015) 1, 12

Published: Jan 14, 2015

e-Print:

1403.5528 [physics.ins-det]

DOI:

10.1140/epjc/s10052-014-3225-4

View in:

ADS Abstract Service

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Abstract: (Springer)

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

\alpha

radioactivity. A few years ago it was pointed out that the signal from

\beta

s can be tagged by detecting the emitted Cherenkov light, which is not produced by

\alpha

s. 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

\alpha

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.

Note:

5 pages, 4 figures. Added referee corrections

double-beta decay: (0neutrino)
radiation: Cherenkov
bolometer
CUORE
noise
background: radioactivity
sensitivity
crystal
tellurium: oxygen
photon: energy spectrum

References(24)

Figures(4)

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