scholarly journals NEXT: Searching for the ββ0νDecay at the LSC

2018 ◽  
Vol 46 ◽  
pp. 1860039
Author(s):  
P. Novella
Keyword(s):  
High Pressure ◽  
Beta Decay ◽  
Energy Resolution ◽  
Large Scale ◽  
New Physics ◽  
Double Beta Decay ◽  
Text Search ◽  
Physics Program ◽  
The Status ◽  
Event Topology

The goal of the NEXT collaboration is the sensitive search of the neutrino-less double beta decay ([Formula: see text]) of [Formula: see text]Xe at the LSC. After a successful R&D phase, a first large-scale prototype of a high-pressure gas-Xenon electroluminescent TPC (NEW) is being operated at LSC since 2016. NEW is a 10-kg radiopure detector meant to understand the relevant backgrounds for the [Formula: see text]search and to perform a measurement of the two neutrino mode of the double beta decay ([Formula: see text]). The first phase of the NEW physics program comprises the commissioning of the detector and the data taking with calibration sources. This phase has allowed to understand the detector capabilities in terms of energy resolution and event topology reconstruction. The operation of NEW is setting the grounds for the construction of the NEXT-100 detector: a TPC holding 100 kg of [Formula: see text]Xe and reaching a sensitivity to the [Formula: see text]half-life of [Formula: see text] y after 3 years of data taking. The latest results of the NEW detector as well as the status of the NEXT-100 project are presented.

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.

scholarly journals Status of the R2D2 project: A future neutrinoless double beta decay experiment

2021 ◽  
Vol 2105 (1) ◽  
pp. 012016
Author(s):  
Ioannis Katsioulas
Keyword(s):  
High Pressure ◽  
Beta Decay ◽  
Energy Resolution ◽  
Experimental Approach ◽  
Neutrinoless Double Beta Decay ◽  
Large Mass ◽  
Double Beta Decay ◽  
Majorana Particle ◽  
Excellent Energy Resolution ◽  
Double Beta Decay Experiment

Abstract The nature of the neutrino is a central questions in physics. The search for neutrinoless double beta decay is the most sensitive experimental approach to demonstrate that the neutrino is a Majorana particle. Observation of such a rare process demands a detector with an excellent energy resolution, extremely low background, and a large mass of a double beta decaying isotope. R2D2 aims to develop a novel spherical high-pressure TPC that meets all the above requirements. As a first step, the energy resolution of the R2D2 prototype was measured. A 1.1% (FWHM) energy resolution was achieved for 5.3 MeV α-particles in Ar:CH4 at pressure up to 1.1 bar. This is a major milestone for R2D2 and paves the way for further studies with Xe gas and the possible use of this technology for neutrinoless double beta decay searches.

scholarly journals Development of Cryogenic Detectors for Neutrinoless Double Beta Decay Searches

2021 ◽  
Author(s):  
Mattia Beretta ◽  
Lorenzo Pagnanini
Keyword(s):  
Beta Decay ◽  
Large Scale ◽  
Neutrinoless Double Beta Decay ◽  
Lepton Number ◽  
Double Beta Decay ◽  
Cryogenic Detectors ◽  
Lepton Number Violation ◽  
Technical Developments ◽  
The Status ◽  
Suitable Process

Searching for neutrinoless double beta decay is a top priority in particle and astroparticle physics, being the most sensitive test of lepton number violation and the only suitable process to probe the Majorana nature of neutrinos. In order to increase the experimental sensitivity for this particular search, ton-scale detectors operated at nearly zero-background conditions with a few keV energy resolution are required. In this scenario, cryogenic detectors have proven effective in addressing many of these issues simultaneously. After long technical developments, the CUORE experiment established the possibility to operate large scale detectors based on this technology. Parallel studies pointed out that scintillating cryogenic detectors represent a suitable upgrade for the CUORE design, directed towards higher sensitivities. In this work, we review the recent development of cryogenic detectors, starting from the status of the art and outlying the path toward next-generation experiments.

scholarly journals Challenges in Double Beta Decay

2014 ◽  
Vol 2014 ◽  
pp. 1-40 ◽  
Author(s):  
Oliviero Cremonesi ◽  
Maura Pavan
Keyword(s):  
Beta Decay ◽  
Large Scale ◽  
Neutrinoless Double Beta Decay ◽  
New Physics ◽  
Mass Scale ◽  
Double Beta Decay ◽  
New Era ◽  
Technical Performance ◽  
Absolute Mass ◽  
New Ideas

In the past ten years, neutrino oscillation experiments have provided the incontrovertible evidence that neutrinos mix and have finite masses. These results represent the strongest demonstration that the electroweak Standard Model is incomplete and that new Physics beyond it must exist. In this scenario, a unique role is played by the Neutrinoless Double Beta Decay searches which can probe lepton number conservation and investigate the Dirac/Majorana nature of the neutrinos and their absolute mass scale (hierarchy problem) with unprecedented sensitivity. Today Neutrinoless Double Beta Decay faces a new era where large-scale experiments with a sensitivity approaching the so-called degenerate-hierarchy region are nearly ready to start and where the challenge for the next future is the construction of detectors characterized by a tonne-scale size and an incredibly low background. A number of new proposed projects took up this challenge. These are based either on large expansions of the present experiments or on new ideas to improve the technical performance and/or reduce the background contributions. In this paper, a review of the most relevant ongoing experiments is given. The most relevant parameters contributing to the experimental sensitivity are discussed and a critical comparison of the future projects is proposed.

THE STATUS OF TWO-NEUTRINO AND NEUTRINOLESS DOUBLE BETA DECAY SEARCHES

1993 ◽  
Vol 02 (03) ◽  
pp. 507-546 ◽  
Author(s):  
M.K. MOE
Keyword(s):  
Beta Decay ◽  
Neutrinoless Double Beta Decay ◽  
Double Beta Decay ◽  
Experimental Activity ◽  
The Past ◽  
The Status ◽  
Substantial Progress ◽  
Direct Counting ◽  
Made In

Substantial progress has been made in double beta decay experiments in the past few years, including the beginning of sensitive new searches for neutrinoless double beta decay, and several additional positive detections of the two-neutrino mode by geochemical, radiochemical, and direct-counting techniques. This review discusses the recent experimental activity.

First results of a search for the two-neutrino double-beta decay of 136Xe with high-pressure copper proportional counters

2004 ◽  
Vol 67 (11) ◽  
pp. 2011-2016 ◽  
Author(s):  
Yu. M. Gavriljuk ◽  
A. M. Gangapshev ◽  
V. V. Kuzminov ◽  
N. Ya. Osetrova ◽  
S. I. Panasenko ◽  
...  
Keyword(s):  
High Pressure ◽  
Beta Decay ◽  
Double Beta Decay ◽  
Proportional Counters ◽  
First Results
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