scholarly journals The MAJORANA DEMONSTRATOR Neutrinoless Double-Beta Decay Experiment

2014 ◽  
Vol 2014 ◽  
pp. 1-18 ◽  
Author(s):  
N. Abgrall ◽  
E. Aguayo ◽  
F. T. Avignone ◽  
A. S. Barabash ◽  
F. E. Bertrand ◽  
...  
Keyword(s):  
South Dakota ◽  
Rare Decay ◽  
Neutrinoless Double Beta Decay ◽  
Mass Scale ◽  
Double Beta Decay ◽  
Research Facility ◽  
Absolute Mass ◽  
Sanford Underground Research Facility ◽  
Active Shielding ◽  
Double Beta Decay Experiment

The MajoranaDemonstratorwill search for the neutrinoless double-beta(ββ0ν)decay of the isotopeGe with a mixed array of enriched and natural germanium detectors. The observation of this rare decay would indicate that the neutrino is its own antiparticle, demonstrate that lepton number is not conserved, and provide information on the absolute mass scale of the neutrino. The Demonstratoris being assembled at the 4850-foot level of the Sanford Underground Research Facility in Lead, South Dakota. The array will be situated in a low-background environment and surrounded by passive and active shielding. Here we describe the science goals of the Demonstratorand the details of its design.

NEUTRINOLESS DOUBLE BETA DECAY

2012 ◽  
Vol 12 ◽  
pp. 80-89
Author(s):  
OLIVIERO CREMONESI
Keyword(s):  
Beta Decay ◽  
Present Status ◽  
Neutrinoless Double Beta Decay ◽  
Mass Scale ◽  
Present Knowledge ◽  
Double Beta Decay ◽  
Neutrino Masses ◽  
Mixing Parameters ◽  
Absolute Mass ◽  
Practical Tool

Neutrinoless double beta decay (ββ(0ν)) is presently the only practical tool for probing the character of neutrinos. In case neutrinos are Majorana particles ββ(0ν) can provide also fundamental informations on their absolute mass scale. The present status of experiments searching for ββ(0ν) is reviewed and the most relevant results discussed. A possibility to observe ββ(0ν) at a neutrino mass scale in the range 10-50 meV looks possible according to our present knowledge of the neutrino masses and mixing parameters. A review of the future projects and of the most relevant parameters contributing to the experimental sensitivity iss finally outlined.

DOUBLE BETA DECAY: EXPERIMENT AND THEORY

2006 ◽  
Vol 21 (08n09) ◽  
pp. 1887-1900 ◽  
Author(s):  
OLIVIERO CREMONESI
Keyword(s):  
Neutrino Physics ◽  
Beta Decay ◽  
Neutrinoless Double Beta Decay ◽  
Mass Scale ◽  
Present Knowledge ◽  
Double Beta Decay ◽  
Neutrino Masses ◽  
Mixing Parameters ◽  
Real Challenge ◽  
Double Beta Decay Experiment

The present status of experiments searching for neutrinoless double-beta decay (ββ(0ν)) is reviewed and the results of the most sensitive experiments discussed. Phenomenological aspects of ββ(0ν) are introduced and most relevant aspects for neutrino physics discussed. Given the observation of neutrino oscillations and the present knowledge of neutrino masses and mixing parameters, a possibility to observe ββ(0ν) at a neutrino mass scale mν ≈10-50 meV could actually exist. The achievement of the required experimental sensitivity is a real challenge faced by a number of new proposed projects. A review of the most relevant of them is given.

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.

scholarly journals Latest results of the LUX dark matter experiment

2020 ◽  
Vol 50 ◽  
pp. 2060002
Author(s):  
David Woodward
Keyword(s):  
Dark Matter ◽  
South Dakota ◽  
Weakly Interacting Massive Particles ◽  
Recent Analysis ◽  
Research Facility ◽  
Detection Techniques ◽  
Electron Recoil ◽  
Low Mass ◽  
Model Independent ◽  
Sanford Underground Research Facility

LUX (Large Underground Xenon) was a dark matter experiment, which was housed at the Sanford Underground Research Facility (SURF) in South Dakota until late 2016, and previously set world-leading limits on Weakly Interacting Massive Particles (WIMPs), axions and axion-like particles (ALPs). This proceeding presents an overview of the LUX experiment and discusses the most recent analysis efforts, which are probing various dark matter models and detection techniques. In particular, studies of signals from inelastic scattering processes and of single scintillation photon events have improved the sensitivity of the experiment to low mass WIMPs. Additionally, a model-independent search for modulations in the LUX electron recoil rate is presented, demonstrating the most sensitive annual modulation search to date.

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