RECORD
New measurement of $\theta_{13}$ via neutron capture on hydrogen at Daya Bay
High Energy Physics - Experiment · Submitted 11 Mar 2016
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim The deficit in the detected number of antineutrinos at the far detectors relative to the expected number based on the near detectors yielded $\sin^22\theta_{13} = 0.071 \pm 0.011$ in the three-neutrino-oscillation framework.
The compiled record
The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.
Open the compiled record
The abstract, sentence by sentence
This article reports an improved independent measurement of neutrino mixing angle $\theta_{13}$ at the Daya Bay Reactor Neutrino Experiment. Electron antineutrinos were identified by inverse $\beta$-decays with the emitted neutron captured by hydrogen, yielding a data-set with principally distinct uncertainties from that with neutrons captured by gadolinium. With the final two of eight antineutrino detectors installed, this study used 621 days of data including the previously reported 217-day data set with six detectors. The dominant statistical uncertainty was reduced by 49%. Intensive studies of the cosmogenic muon-induced $^9$Li and fast neutron backgrounds and the neutron-capture energy selection efficiency, resulted in a reduction of the systematic uncertainty by 26%. The deficit in the detected number of antineutrinos at the far detectors relative to the expected number based on the near detectors yielded $\sin^22\theta_{13} = 0.071 \pm 0.011$ in the three-neutrino-oscillation framework. The combination of this result with the gadolinium-capture result is also reported.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | This article reports an improved independent measurement of neutrino mixing angle $\theta_{13}$ at the Daya Bay Reactor Neutrino Experiment. | contribution 1.00 | 0.93 | 0.14 | asserted 1.00 |
| s1 | Electron antineutrinos were identified by inverse $\beta$-decays with the emitted neutron captured by hydrogen, yielding a data-set with principally distinct uncertainties from that with neutrons captured by gadolinium. | method 0.97 | 0.87 | 0.03 | asserted 1.00 |
| s2 | With the final two of eight antineutrino detectors installed, this study used 621 days of data including the previously reported 217-day data set with six detectors. | method 0.95 | 0.87 | 0.02 | asserted 1.00 |
| s3 | The dominant statistical uncertainty was reduced by 49%. | result 0.75 | 0.92 | 0.03 | asserted 1.00 |
| s4 | Intensive studies of the cosmogenic muon-induced $^9$Li and fast neutron backgrounds and the neutron-capture energy selection efficiency, resulted in a reduction of the systematic uncertainty by 26%. | method 0.51 | 0.95 | 0.02 | asserted 1.00 |
| s5 | The deficit in the detected number of antineutrinos at the far detectors relative to the expected number based on the near detectors yielded $\sin^22\theta_{13} = 0.071 \pm 0.011$ in the three-neutrino-oscillation framework. | result 1.00 | 0.97 | 0.94 | asserted 1.00 |
| s6 | The combination of this result with the gadolinium-capture result is also reported. | contribution 0.79 | 0.86 | 0.03 | asserted 0.87 |
What was examined, and what was not
- arXiv listing abstract v2
- full text
- figures and tables
- references and citing sentences
- relations to other papers
- P abstract
- S sections
- T body sentences
- C citations
- R cross-paper relations
The paper
Original abstract
This article reports an improved independent measurement of neutrino mixing angle $\theta_{13}$ at the Daya Bay Reactor Neutrino Experiment. Electron antineutrinos were identified by inverse $\beta$-decays with the emitted neutron captured by hydrogen, yielding a data-set with principally distinct uncertainties from that with neutrons captured by gadolinium. With the final two of eight antineutrino detectors installed, this study used 621 days of data including the previously reported 217-day data set with six detectors. The dominant statistical uncertainty was reduced by 49%. Intensive studies of the cosmogenic muon-induced $^9$Li and fast neutron backgrounds and the neutron-capture energy selection efficiency, resulted in a reduction of the systematic uncertainty by 26%. The deficit in the detected number of antineutrinos at the far detectors relative to the expected number based on the near detectors yielded $\sin^22\theta_{13} = 0.071 \pm 0.011$ in the three-neutrino-oscillation framework. The combination of this result with the gadolinium-capture result is also reported.
Human review
References
How the literature uses it
13 arXiv papers cite this in 21 sentences
Papers citing it · 10 sentences without a confident label
Uses its method or tool 4 papers
-
The delayed-energy cut efficiency uncertainty was assessed using the method introduced in Ref. [ref] .
Latest oscillation results from Daya Bay · Neutrino Oscillation Results Based on Neutron Capture on Hydrogen · 1.00
-
The predicted rate and energy spectrum of reactor IBDs uses the Huber-Mueller isotope model and other inputs, as described in Ref. [ref] .
Initial measurement of reactor antineutrino oscillation at SNO+ · Reactor antineutrinos · 0.87
-
An alternate technique, outlined in [ref] , provided a more general approach for assessing this uncertainty.
Measurement of electron antineutrino oscillation based on 1230 days of operation of the Daya Bay experiment · Antineutrino Selection · 0.97
Uses its data or values 2 papers
-
To carry this out, we need the best data on $θ_13$ which are from two experiments [ref] .
Second Octant Favored for Non-Maximal $\theta_{23}$ · Experimental Data · 1.00
-
Reactor experiments Daya Bay [ref] , RENO [ref] and Double Chooz [ref] gave us the last mixing angle $sin^2 θ_13 = 0.024 ±0.002$.
Effects of Matter in Neutrino Oscillations and Determination of Neutrino Mass Hierarchy at Long-baseline Experiments · Introduction · 0.93
Compares with it 2 papers
-
We utilized over 3.6 million IBD candidates, marking a significant increase in statistics compared to the previous study [ref] .
Latest oscillation results from Daya Bay · Neutrino Oscillation Results Based on Neutron Capture on Hydrogen · 0.90
-
Despite these obstacles, independent measurements of neutrino oscillation have been obtained using these interactions [ref] , with results that were consistent with the analysis of signals identified by n-Gd capture, albeit with less precision.
Measurement of electron antineutrino oscillation based on 1230 days of operation of the Daya Bay experiment · Antineutrino Selection · 0.86
Cites it as support 1 paper
-
Simulations which accounted for potential light production in the MO supported this conclusion [ref] .
Measurement of electron antineutrino oscillation based on 1230 days of operation of the Daya Bay experiment · Calibration Performance · 0.98
Cites it as background 1 paper
-
In neutrino oscillations, CPV can arise from $δ_CP$, an irreducible CP-odd phase in the lepton mixing matrix, which can be measured at T2K by comparing the $ν_μ→ν_e$ and $ν̅_μ→ν̅_e$ oscillation probabilities or by comparing these oscillations with $ν̅_e$ disappearance measured by reactors [ref] .
Sensitivity of the T2K accelerator-based neutrino experiment with an Extended run to $20\times10^{21}$ POT · Introduction · 0.88
What it cites · 49 sentences without a confident label
Builds on 1 paper
-
The previous analysis of $n$H IBDs from Daya Bay [ref] is improved in this article with 3.6 times the number of detected IBDs and with reduced uncertainties of backgrounds and the neutron-capture energy selection efficiency.
Independent Measurement of Theta13 via Neutron Capture on Hydrogen at Daya Bay · Introduction · 0.84
Uses the method or tool of 10 papers
-
The fast neutron background and its uncertainty were both estimated as in Ref. [ref] .
A new measurement of antineutrino oscillation with the full detector configuration at Daya Bay · Fast-neutron Background · 0.98
-
The simulation framework of Daya Bay is based on Geant4 [ref] and has been validated with comparisons to data [ref] .
Improved Measurement of Electron Antineutrino Disappearance at Daya Bay · Detection Efficiency · 0.96
-
Each ABS was scaled to a calculated number of accidentals ($N_Acc$) and subtracted from its corresponding number of DCs ($N_DC$) to obtain the energy distribution of correlated DCs ($N_Cor$), which are dominantly due to IBDs: [equation] where $T_DAQ$ is the DAQ time, $ε_μ$ is the muon-veto efficiency, and $R_Acc$ is the rate of coincidence of uncorrelated single events, which is expressed as [ref] [equation] where $R_s$ is the rate of uncorrelated single events and $ε_m$ is the multiplicity selection efficiency, both defined in Eq. ([ref]).
A Precise Calculation of Delayed Coincidence Selection Efficiency and Accidental Coincidence Rate · Accidental Background · 0.98
Uses data or values from 7 papers
-
Updated values for backgrounds, efficiencies, and the fraction of uncertainty due to statistics were taken from Ref. [ref] , for the $n$Gd-IBD analysis.
A new measurement of antineutrino oscillation with the full detector configuration at Daya Bay · $n$H-$n$Gd Combined Result · 1.00
-
The thermal power of the reactor $W_th(t)$ and fraction of fissions due to the $i$-th isotope $f_i(t)$ were supplied by the nuclear power plant, the average thermal energies released per fission $e_i$ were from Ref. [ref] , the antineutrino yields per fission $S_i(E)$ from $^238$U, and from $^235$U, $^239$Pu, and $^241$Pu, were from Ref. [ref] and Ref. [ref] , respectively.
On the determination of anti-neutrino spectra from nuclear reactors · Reactor antineutrino flux · 0.99
-
The thermal power of the reactor $W_th(t)$ and fraction of fissions due to the $i$-th isotope $f_i(t)$ were supplied by the nuclear power plant, the average thermal energies released per fission $e_i$ were from Ref. [ref] , the antineutrino yields per fission $S_i(E)$ from $^238$U, and from $^235$U, $^239$Pu, and $^241$Pu, were from Ref. [ref] and Ref. [ref] , respectively.
Improved Predictions of Reactor Antineutrino Spectra · Reactor antineutrino flux · 0.99
Compares with 3 papers
-
The uncertainty of the delayed-energy selection efficiency reduced from 0.5% [ref] to 0.35% because of a new estimation and an update of the original estimation to scale the number of spallation neutrons with the number of target protons.
Independent Measurement of Theta13 via Neutron Capture on Hydrogen at Daya Bay · Summary · 0.81
-
The most recent $n$Gd result from Daya Bay [ref] is included for comparison.
A new measurement of antineutrino oscillation with the full detector configuration at Daya Bay · Fit for $sin^22θ_13$ · 1.00
-
The present $n$H-IBD analysis was cross-checked with an independent analysis based on a different analysis framework [ref] .
Data processing and storage in the Daya Bay Reactor Antineutrino Experiment · Independent Analysis · 0.87
Cites as background 10 papers
-
The three reactor antineutrino experiments, Double Chooz [ref] , RENO [ref] , and Daya Bay [ref] , currently provide the most precise measurements of the mixing angle.
RENO: An Experiment for Neutrino Oscillation Parameter theta_13 Using Reactor Neutrinos at Yonggwang · Introduction · 0.85
-
The three reactor antineutrino experiments, Double Chooz [ref] , RENO [ref] , and Daya Bay [ref] , currently provide the most precise measurements of the mixing angle.
A Precision Measurement of the Neutrino Mixing Angle theta_13 using Reactor Antineutrinos at Daya Bay · Introduction · 0.85
-
Prior to 2012, many experimental efforts had been made to determine $θ_13$ [ref] .
Indication of Electron Neutrino Appearance from an Accelerator-produced Off-axis Muon Neutrino Beam · Introduction · 1.00
Discussion
Know something about this paper? Leave a comment, or highlight any passage above to comment on it.