scholarly journals Three-dimensional convolutional neural networks for neutrinoless double-beta decay signal/background discrimination in high-pressure gaseous Time Projection Chamber

2018 ◽  
Vol 13 (08) ◽  
pp. P08015-P08015 ◽  
Author(s):  
P. Ai ◽  
D. Wang ◽  
G. Huang ◽  
X. Sun
Keyword(s):  
Neural Networks ◽  
High Pressure ◽  
Beta Decay ◽  
Convolutional Neural Networks ◽  
Time Projection Chamber ◽  
Three Dimensional ◽  
Neutrinoless Double Beta Decay ◽  
Double Beta Decay ◽  
Decay Signal ◽  
Time Projection

Limits on neutrinoless double beta decay in 136Xe with a time projection chamber

1992 ◽  
Vol 28 (1) ◽  
pp. 226-228
Author(s):  
H.T. Wong ◽  
F. Boehm ◽  
P. Fisher ◽  
K. Gabathuler ◽  
H. Henrikson ◽  
...  
Keyword(s):  
Beta Decay ◽  
Time Projection Chamber ◽  
Neutrinoless Double Beta Decay ◽  
Double Beta Decay ◽  
Time Projection

scholarly journals Demonstration of background rejection using deep convolutional neural networks in the NEXT experiment

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
M. Kekic ◽  
◽  
C. Adams ◽  
K. Woodruff ◽  
J. Renner ◽  
...  
Keyword(s):  
Neural Networks ◽  
Beta Decay ◽  
Convolutional Neural Networks ◽  
Data Augmentation ◽  
Neutrinoless Double Beta Decay ◽  
High Energy ◽  
Double Beta Decay ◽  
Deep Convolutional Neural Networks ◽  
Calibration Source ◽  
Background Rejection

Abstract Convolutional neural networks (CNNs) are widely used state-of-the-art computer vision tools that are becoming increasingly popular in high-energy physics. In this paper, we attempt to understand the potential of CNNs for event classification in the NEXT experiment, which will search for neutrinoless double-beta decay in 136Xe. To do so, we demonstrate the usage of CNNs for the identification of electron-positron pair production events, which exhibit a topology similar to that of a neutrinoless double-beta decay event. These events were produced in the NEXT-White high-pressure xenon TPC using 2.6 MeV gamma rays from a 228Th calibration source. We train a network on Monte Carlo-simulated events and show that, by applying on-the-fly data augmentation, the network can be made robust against differences between simulation and data. The use of CNNs offers significant improvement in signal efficiency and background rejection when compared to previous non-CNN-based analyses.

scholarly journals Sensitivity of the DARWIN observatory to the neutrinoless double beta decay of $$^{136}$$Xe

2020 ◽  
Vol 80 (9) ◽  
Author(s):  
F. Agostini ◽  
◽  
S. E. M. Ahmed Maouloud ◽  
L. Althueser ◽  
F. Amaro ◽  
...  
Keyword(s):  
Beta Decay ◽  
Time Projection Chamber ◽  
Region Of Interest ◽  
Neutrinoless Double Beta Decay ◽  
Double Beta Decay ◽  
Monte Carlo Simulation Study ◽  
Background Rate ◽  
Fiducial Volume ◽  
Particle Dark Matter ◽  
Time Projection

AbstractThe DARWIN observatory is a proposed next-generation experiment to search for particle dark matter and for the neutrinoless double beta decay of $$^{136}$$ 136 Xe. Out of its 50 t total natural xenon inventory, 40 t will be the active target of a time projection chamber which thus contains about 3.6 t of $$^{136}$$ 136 Xe. Here, we show that its projected half-life sensitivity is $$2.4\times {10}^{27}\,{\hbox {year}}$$ 2.4 × 10 27 year , using a fiducial volume of 5 t of natural xenon and 10 year of operation with a background rate of less than 0.2 events/(t $$\cdot $$ ·  year) in the energy region of interest. This sensitivity is based on a detailed Monte Carlo simulation study of the background and event topologies in the large, homogeneous target. DARWIN will be comparable in its science reach to dedicated double beta decay experiments using xenon enriched in $$^{136}$$ 136 Xe.

scholarly journals Design and performance of a high-pressure xenon gas TPC as a prototype for a large-scale neutrinoless double-beta decay search

2020 ◽  
Vol 2020 (3) ◽  
Author(s):  
S Ban ◽  
M Hirose ◽  
A K Ichikawa ◽  
Y Iwashita ◽  
T Kikawa ◽  
...  
Keyword(s):  
High Pressure ◽  
Beta Decay ◽  
Energy Resolution ◽  
Large Scale ◽  
Gamma Ray ◽  
Neutrinoless Double Beta Decay ◽  
Double Beta Decay ◽  
Detector Performance ◽  
And Performance ◽  
Time Projection

Abstract A high-pressure xenon gas time projection chamber, with a unique cellular readout structure based on electroluminescence, has been developed for a large-scale neutrinoless double-beta decay search. In order to evaluate the detector performance and validate its design, a 180 L size prototype is being constructed and its commissioning with partial detector has been performed. The obtained energy resolution at 4.0 bar is 1.73 $\pm$ 0.07% (FWHM) at 511 keV. The energy resolution at the $^{136}$Xe neutrinoless double-beta decay $Q$-value is estimated to be between 0.79 and 1.52% (FWHM) by extrapolation. Reconstructed event topologies show patterns peculiar to the track endpoint that can be used to distinguish $0\nu\beta\beta$ signals from gamma-ray backgrounds.

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