scholarly journals Latest Results from Neutrino Oscillation Experiment Daya Bay

2019 ◽  
Vol 64 (7) ◽  
pp. 653
Author(s):  
V. Vorobel
Keyword(s):  
Mass Splitting ◽  
Current Status ◽  
Daya Bay ◽  
Neutrino Experiment ◽  
Neutrino Mixing ◽  
Mixing Angle ◽  
Reactor Antineutrino ◽  
Neutrino Oscillation Experiment ◽  
Reactor Neutrino ◽  
Antineutrino Flux

The Daya Bay Reactor Neutrino Experiment was designed to measure Θ13, the smallest mixing angle in the three-neutrino mixing framework, with unprecedented precision. The experiment consists of eight identically designed detectors placed underground at different baselines from three pairs of nuclear reactors in South China. Since Dec. 2011, the experiment has been running stably for more than 7 years, and has collected the largest reactor antineutrino sample to date. Daya Bay greatly improved the precision on Θ13 and made an independent measurement of the effective mass splitting in the electron antineutrino disappearance channel. Daya Bay also performed a number of other precise measurements such as a high-statistics determination of the absolute reactor antineutrino flux and the spectrum evolution, as well as a search for the sterile neutrino mixing, among others. The most recent results from Daya Bay are discussed in this paper, as well as the current status and future prospects of the experiment.

scholarly journals Energy non-linearity studies at Daya Bay

2014 ◽  
Vol 31 ◽  
pp. 1460312 ◽  
Author(s):  
Masheng Yang ◽  
Yaping Cheng ◽  
Keyword(s):  
Energy Spectrum ◽  
Neutrino Mass ◽  
Shape Analysis ◽  
Mass Splitting ◽  
Neutrino Energy ◽  
Daya Bay ◽  
Neutrino Experiment ◽  
Neutrino Mixing ◽  
Mixing Angle ◽  
Reactor Neutrino

The Daya Bay Reactor Neutrino Experiment has measured a non-zero value of the neutrino mixing angle θ13 with a significance of 7.7 standard deviations by a rate-only analysis.1 The distortion of neutrino energy spectrum carries additional oscillation information and can improve the sensitivity of θ13 as well as measure neutrino mass splitting [Formula: see text]. A rate plus shape analysis is performed and the results have been published.2 Understanding detector energy non-linearity response is crucial for the rate plus shape analysis. In this contribution, we present a brief description of energy non-linearity studies at Daya Bay.

scholarly journals REVIEW OF REACTOR NEUTRINO OSCILLATION EXPERIMENTS

2012 ◽  
Vol 27 (08) ◽  
pp. 1230010 ◽  
Author(s):  
C. MARIANI
Keyword(s):  
Neutrino Physics ◽  
Neutrino Oscillation ◽  
Current Status ◽  
Daya Bay ◽  
Neutrino Mixing ◽  
Mixing Angle ◽  
Double Chooz ◽  
Reactor Neutrino ◽  
Neutrino Experiments ◽  
Near Future

In this document we will review the current status of reactor neutrino oscillation experiments and present their physics potentials for measuring the θ13 neutrino mixing angle. The neutrino mixing angle θ13 is currently a high-priority topic in the field of neutrino physics. There are currently three different reactor neutrino experiments, DOUBLE CHOOZ, DAYA BAY and RENO and a few accelerator neutrino experiments searching for neutrino oscillations induced by this angle. A description of the reactor experiments searching for a nonzero value of θ13 is given, along with a discussion of the sensitivities that these experiments can reach in the near future.

scholarly journals Recent results from reactor antineutrino experiments

2019 ◽  
Author(s):  
Hyunkwan Seo
Keyword(s):  
Oscillation Frequency ◽  
Reactor Fuel ◽  
Daya Bay ◽  
Neutrino Mixing ◽  
Mixing Angle ◽  
Reactor Antineutrino ◽  
Double Chooz ◽  
Antineutrino Flux

The smallest neutrino mixing angle \theta_{13}θ13 has been successfully measured by the disappearance of reactor antineutrinos at RENO, Daya Bay, and Double Chooz. The oscillation frequency is also measured based on energy and baseline dependent disappearance probability of reactor antineutrinos. Recent results find a variation in the observed reactor antineutrino flux as a function of the reactor fuel evolution. We report more precisely measured values of \theta_{13}θ13 and \Delta m_{ee}^2Δmee2 and results on the evolution of observed reactor antineutrino yield and spectrum.

scholarly journals Electron-antineutrino disappearance seen by Daya Bay reactor neutrino experiment

2012 ◽  
Vol 8 (S288) ◽  
pp. 326-328
Author(s):  
Ruiguang Wang
Keyword(s):  
Daya Bay ◽  
Neutrino Experiment ◽  
Neutrino Mixing ◽  
Expected Number ◽  
Mixing Angle ◽  
Time Exposure ◽  
Electron Antineutrino ◽  
Reactor Neutrino ◽  
Standard Deviations

AbstractThe Daya Bay Reactor Neutrino Experiment has measured a non-zero value for the neutrino mixing angle θ13 with a significance of 7.7 standard deviations. Antineutrinos from six 2.9 GWth reactors were detected in six antineutrino detectors deployed in two near and one far underground experimental halls. With a 116.8 kton-GWth-day live-time exposure in 139 days, 28,909 (205,308) electron-antineutrino candidates were detected at the far hall (near hall). The ratio of the observed to expected number of antineutrinos at the far hall is R = 0.944 ± 0.007 ± 0.003 (syst). A rate-only analysis finds sin22θ13 = 0.089 ± 0.010 (stat) ± 0.005 (syst) in a three-neutrino framework.

scholarly journals Reactor neutrino experiments: θ13 and beyond

2014 ◽  
Vol 29 (16) ◽  
pp. 1430016 ◽  
Author(s):  
Xin Qian ◽  
Wei Wang
Keyword(s):  
New Physics ◽  
Daya Bay ◽  
Neutrino Experiment ◽  
Mass Hierarchy ◽  
Neutrino Mixing ◽  
Next Generation ◽  
Short Baseline ◽  
Current Generation ◽  
Reactor Neutrino ◽  
Neutrino Experiments

We review the current-generation short-baseline reactor neutrino experiments that have firmly established the third neutrino mixing angle θ13 to be nonzero. The relative large value of θ13 (around 9°) has opened many new and exciting opportunities for future neutrino experiments. Daya Bay experiment with the first measurement of [Formula: see text] is aiming for a precision measurement of this atmospheric mass-squared splitting with a comparable precision as [Formula: see text] from accelerator muon neutrino experiments. JUNO, a next-generation reactor neutrino experiment, is targeting to determine the neutrino mass hierarchy (MH) with medium baselines (~ 50 km). Beside these opportunities enabled by the large θ13, the current-generation (Daya Bay, Double Chooz, and RENO) and the next-generation (JUNO, RENO-50, and PROSPECT) reactor experiments, with their unprecedented statistics, are also leading the precision era of the three-flavor neutrino oscillation physics as well as constraining new physics beyond the neutrino Standard Model.

scholarly journals CHARGED LEPTON CORRECTION TO TRI-BIMAXIMAL LEPTON MIXING AND ITS IMPLICATIONS TO NEUTRINO PHENOMENOLOGY

2013 ◽  
Vol 28 (31) ◽  
pp. 1350131 ◽  
Author(s):  
SRINU GOLLU ◽  
K. N. DEEPTHI ◽  
R. MOHANTA
Keyword(s):  
Charged Lepton ◽  
Daya Bay ◽  
Neutrino Mixing ◽  
Mixing Angle ◽  
Quark Sector ◽  
Mass Matrices ◽  
Reactor Neutrino ◽  
Mixing Matrix ◽  
Neutrino Experiments ◽  
Reactor Mixing

The recent results from Daya Bay and RENO reactor neutrino experiments have firmly established that the smallest reactor mixing angle θ13 is nonvanishing at the 5 σ level, with a relatively large value, i.e. θ13 ≈ 9°. Using the fact that the neutrino mixing matrix can be represented as [Formula: see text], where Ul and Uν result from the diagonalization of the charged lepton and neutrino mass matrices and Pν is a diagonal matrix containing the Majorana phases and assuming the tri-bimaximal (TBM) form for Uν, we investigate the possibility of accounting for the large reactor mixing angle due to the corrections of the charged lepton mixing matrix. The form of Ul is assumed to be that of CKM mixing matrix of the quark sector. We find that with this modification it is possible to accommodate the large observed reactor mixing angle θ13. We also study the implications of such corrections on the other phenomenological observables.

Uncertainty analysis of fission fraction for reactor antineutrino experiments

2016 ◽  
Vol 31 (20) ◽  
pp. 1650120 ◽  
Author(s):  
X. B. Ma ◽  
F. Lu ◽  
L. Z. Wang ◽  
Y. X. Chen ◽  
W. L. Zhong ◽  
...  
Keyword(s):  
Uncertainty Analysis ◽  
Open Source ◽  
Correlation Coefficient ◽  
Source Code ◽  
Daya Bay ◽  
Neutrino Experiment ◽  
Open Source Code ◽  
Reactor Neutrino ◽  
Antineutrino Flux ◽  
The Difference

Reactor simulation is an important source of uncertainties for a reactor neutrino experiment. Therefore, how to evaluate the antineutrino flux uncertainty results from reactor simulation is an important question. In this study, a method of the antineutrino flux uncertainty result from reactor simulation was proposed by considering the correlation coefficient. In order to use this method in the Daya Bay antineutrino experiment, the open source code DRAGON was improved and used for obtaining the fission fraction and correlation coefficient. The average fission fraction between DRAGON and SCIENCE code was compared and the difference was less than 5% for all the four isotopes. The uncertainty of fission fraction was evaluated by comparing simulation atomic density of four main isotopes with Takahama-3 experiment measurement. After that, the uncertainty of the antineutrino flux results from reactor simulation was evaluated as 0.6% per core for Daya Bay antineutrino experiment.

scholarly journals The physics potential of a reactor neutrino experiment with Skipper CCDs: measuring the weak mixing angle

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
Guillermo Fernandez-Moroni ◽  
Pedro A. N. Machado ◽  
Ivan Martinez-Soler ◽  
Yuber F. Perez-Gonzalez ◽  
Dario Rodrigues ◽  
...  
Keyword(s):  
Experimental Setup ◽  
Neutrino Experiment ◽  
Weak Mixing Angle ◽  
Weak Mixing ◽  
Background Rate ◽  
Mixing Angle ◽  
Reactor Antineutrino ◽  
Physics Potential ◽  
Antineutrino Flux ◽  
Nucleus Scattering

Abstract We analyze in detail the physics potential of an experiment like the one recently proposed by the vIOLETA collaboration: a kilogram-scale Skipper CCD detector deployed 12 meters away from a commercial nuclear reactor core. This experiment would be able to detect coherent elastic neutrino nucleus scattering from reactor neutrinos, capitalizing on the exceptionally low ionization energy threshold of Skipper CCDs. To estimate the physics reach, we elect the measurement of the weak mixing angle as a case study. We choose a realistic benchmark experimental setup and perform variations on this benchmark to understand the role of quenching factor and its systematic uncertainties, background rate and spectral shape, total exposure, and reactor antineutrino flux uncertainty. We take full advantage of the reactor flux measurement of the Daya Bay collaboration to perform a data driven analysis which is, up to a certain extent, independent of the theoretical un- certainties on the reactor antineutrino flux. We show that, under reasonable assumptions, this experimental setup may provide a competitive measurement of the weak mixing angle at few MeV scale with neutrino-nucleus scattering.

Study on Piezoelectric Effect of Ceramic Capacitors in Daya Bay Neutrino Experiment

2012 ◽  
Vol 443-444 ◽  
pp. 309-312
Author(s):  
Wen Qi Jiang ◽  
Zheng Wang
Keyword(s):  
Power Plant ◽  
Nuclear Power ◽  
Piezoelectric Effect ◽  
Liquid Scintillator ◽  
Daya Bay ◽  
Neutrino Experiment ◽  
Mixing Angle ◽  
Neutrino Detectors ◽  
Neutrino Oscillation Experiment ◽  
Oscillation Experiment

The Daya Bay Neutrino Experiment is a neutrino-oscillation experiment designed to measure the mixing angle θ13 using anti-neutrinos produced by the reactors of the Daya Bay Nuclear Power Plant (NPP) and the Ling Ao NPP. Eight anti-neutrino detectors (AD) consists of liquid scintillator and Photomultiplier Tubes (PMTs) will be used in the experiment. The readout signals of the PMTs which are reacted by the Neutrino need to be accurately measured for the goal of the Daya Bay experiment which needs a measurement of sin22θ13 to 0.01 or better. But ringing was found in the PMT test. This paper describes the ringing in the readout signals of the PMTs, and analyses the cause of the ringing.

NEUTRINO OSCILLATION AND THE DAYA BAY θ13 EXPERIMENT

2008 ◽  
Vol 23 (13) ◽  
pp. 1929-1948
Author(s):  
BING-LIN YOUNG
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Neutrino Oscillation ◽  
Nuclear Power ◽  
Neutrino Oscillations ◽  
Current Status ◽  
Daya Bay ◽  
Neutrino Experiment ◽  
Mixing Angle

A brief summary of the current status of neutrino oscillations will be given. Then the on-going construction of the Daya Bay Reaction Neutrino Experiment near the Daya Bay nuclear power plant is sketched. The Daya Bay experiment will measure the mixing angle θ13 to the level of sin 2 2θ13 = 0.01.

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