R. Leitner
A5074334444- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Computational Physics and Python Applications
- Cosmology and Gravitation Theories
- Astrophysics and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Black Holes and Theoretical Physics
- Particle Accelerators and Free-Electron Lasers
- Distributed and Parallel Computing Systems
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Superconducting Materials and Applications
- Muon and positron interactions and applications
- Particle accelerators and beam dynamics
- CCD and CMOS Imaging Sensors
- Advanced Data Storage Technologies
- advanced mathematical theories
- Nuclear Physics and Applications
- Algorithms and Data Compression
- Scientific Research and Discoveries
- Nuclear physics research studies
Charles University
2016-2025
University of California, Santa Cruz
2017-2024
Université Savoie Mont Blanc
2020-2024
Institut National de Physique Nucléaire et de Physique des Particules
1997-2024
Beijing Normal University
2022-2024
Institute of Science and Technology
2023-2024
Pontifical Catholic University of Rio de Janeiro
2022-2024
Institute for High Energy Physics
2023-2024
Université Libre de Bruxelles
2022-2024
China Institute of Atomic Energy
2024
The Daya Bay Reactor Neutrino Experiment has measured a nonzero value for the neutrino mixing angle ${\ensuremath{\theta}}_{13}$ with significance of 5.2 standard deviations. Antineutrinos from six 2.9 $\mathrm{G}{\mathrm{W}}_{\mathrm{th}}$ reactors were detected in antineutrino detectors deployed two near (flux-weighted baseline 470 m and 576 m) one far (1648 underground experimental halls. With $43\text{ }000\text{ }\text{ }\mathrm{ton}--\mathrm{G}{\mathrm{W}}_{\mathrm{th}}--\mathrm{day}$...
The Jiangmen Underground Neutrino Observatory (JUNO), a 20 kton multi-purpose underground liquid scintillator detector, was proposed with the determination of neutrino mass hierarchy as primary physics goal. It is also capable observing neutrinos from terrestrial and extra-terrestrial sources, including supernova burst neutrinos, diffuse background, geoneutrinos, atmospheric solar well exotic searches such nucleon decays, dark matter, sterile etc. We present motivations anticipated...
A measurement of the energy dependence antineutrino disappearance at Daya Bay reactor neutrino experiment is reported. Electron antineutrinos (ν¯(e)) from six 2.9 GW(th) reactors were detected with detectors deployed in two near (effective baselines 512 and 561 m) one far (1579 underground experimental halls. Using 217 days data, 41 589 (203 809 92 912) candidates hall (near halls). An improved oscillation amplitude sin(2)2θ(13)=0.090(-0.009)(+0.008) first direct ν¯(e) mass-squared...
We report an improved measurement of the neutrino mixing angle $\theta_{13}$ from Daya Bay Reactor Neutrino Experiment. exclude a zero value for $\sin^22\theta_{13}$ with significance 7.7 standard deviations. Electron antineutrinos six reactors 2.9 GW$_{\rm th}$ were detected in antineutrino detectors deployed two near (flux-weighted baselines 470 m and 576 m) one far (1648 underground experimental halls. Using 139 days data, 28909 (205308) electron candidates at hall (near halls). The ratio...
We report a measurement of electron antineutrino oscillation from the Daya Bay Reactor Neutrino Experiment with nearly 4 million reactor $\overline{\nu}_{e}$ inverse beta decay candidates observed over 1958 days data collection. The installation Flash-ADC readout system and special calibration campaign using different source enclosures reduce uncertainties in absolute energy to less than 0.5% for visible energies larger 2 MeV. uncertainty cosmogenic $^9$Li $^8$He background is reduced 45%...
This Letter reports a measurement of the flux and energy spectrum electron antineutrinos from six 2.9~GW$_{th}$ nuclear reactors with detectors deployed in two near (effective baselines 512~m 561~m) one far (1,579~m) underground experimental halls Daya Bay experiment. Using 217 days data, 296,721 41,589 inverse beta decay (IBD) candidates were detected halls, respectively. The measured IBD yield is (1.55 $\pm$ 0.04) $\times$ 10$^{-18}$~cm$^2$/GW/day or (5.92 0.14) 10$^{-43}$~cm$^2$/fission....
We report a new measurement of electron antineutrino disappearance using the fully constructed Daya Bay Reactor Neutrino Experiment. The final two eight detectors were installed in summer 2012. Including 404 days data collected from October 2012 to November 2013 resulted total exposure 6.9×10^{5} GW_{th} ton days, 3.6 times increase over our previous results. Improvements energy calibration limited variations between 0.2%. Removal six ^{241}Am-^{13}C radioactive sources reduced background by...
The Daya Bay Collaboration reports precise measurements of the ${\ensuremath{\theta}}_{13}$ neutrino mixing angle and predicts $\mathrm{\ensuremath{\Delta}}\phantom{\rule{0}{0ex}}{m}_{32}^{2}$ mass difference for both normal inverted hierarchy scenarios. These values are based on comparing detection antineutrinos by ''near'' ''far'' detectors more than 2.5 million inverse beta-decay observations.
The Daya Bay experiment has observed correlations between reactor core fuel evolution and changes in the antineutrino flux energy spectrum. Four detectors two experimental halls were used to identify 2.2 million inverse beta decays (IBDs) over 1230 days spanning multiple cycles for each of six 2.9 GW$_{\textrm{th}}$ cores at Ling Ao nuclear power plants. Using detector data effective $^{239}$Pu fission fractions, $F_{239}$, from 0.25 0.35, measures an average IBD yield, $\bar{\sigma}_f$,...
A new measurement of the reactor antineutrino flux and energy spectrum by Daya Bay neutrino experiment is reported. The antineutrinos were generated six 2.9~GW$_{\mathrm{th}}$ nuclear reactors detected eight detectors deployed in two near (560~m 600~m flux-weighted baselines) one far (1640~m baseline) underground experimental halls. With 621 days data, more than 1.2 million inverse beta decay (IBD) candidates detected. IBD yield was measured, ratio measured to predicted found be...
We present an extension to the jet area-based pileup subtraction for both kinematics and shapes. A particle-level approach is explored whereby constituents are corrected or removed using of methods currently being employed by LHC experiments. Several shapes nominal radii used assess performance in simulated events with levels equivalent approximately 30 100 interactions per bunch crossing, which characteristic Run I II conditions. An improved removing contributions found when new method. The...
A search for light sterile neutrino mixing was performed with the first 217 days of data from Daya Bay Reactor Antineutrino Experiment. The experiment's unique configuration multiple baselines six 2.9~GW$_{\rm th}$ nuclear reactors to antineutrino detectors deployed in two near (effective 512~m and 561~m) one far (1579~m) underground experimental halls makes it possible test oscillations a fourth (sterile) $10^{\rm -3}~{\rm eV}^{2} < |\Delta m_{41}^{2}| 0.3~{\rm eV}^{2}$ range. relative...
This Letter reports an improved search for light sterile neutrino mixing in the electron antineutrino disappearance channel with full configuration of Daya Bay Reactor Neutrino Experiment. With additional 404 days data collected eight detectors, this benefits from 3.6 times statistics available to previous publication, as well improvements energy calibration and background reduction. A relative comparison rate spectrum reactor antineutrinos three experimental halls yields no evidence...
We present a new determination of the smallest neutrino mixing angle θ_{13} and mass-squared difference Δm_{32}^{2} using final sample 5.55×10^{6} inverse beta-decay (IBD) candidates with final-state neutron captured on gadolinium. This is selected from complete dataset obtained by Daya Bay reactor experiment in 3158 days operation. Compared to previous results, selection IBD has been optimized, energy calibration refined, treatment backgrounds further improved. The resulting oscillation...
Searches for electron antineutrino, muon neutrino, and antineutrino disappearance driven by sterile neutrino mixing have been carried out the Daya Bay MINOS+ collaborations. This Letter presents combined results of these searches, along with exclusion from Bugey-3 reactor experiment, framed in a minimally extended four-neutrino scenario. Significantly improved constraints on θ_{μe} angle are derived that constitute most constraining limits to date over five orders magnitude mass-squared...
This Letter reports the first extraction of individual antineutrino spectra from ^{235}U and ^{239}Pu fission an improved measurement prompt energy spectrum reactor antineutrinos at Daya Bay. The analysis uses 3.5×10^{6} inverse beta-decay candidates in four near detectors 1958 days. two dominant isotopes, ^{239}Pu, are extracted using evolution as a function isotope fractions. In window 4-6 MeV, 7% (9%) excess events is observed for (^{239}Pu) compared with normalized Huber-Mueller model...
A new measurement of the ${\ensuremath{\theta}}_{13}$ mixing angle has been obtained at Daya Bay Reactor Neutrino Experiment via detection inverse beta decays tagged by neutron capture on hydrogen. The antineutrino events for hydrogen are distinct from those gadolinium with largely different systematic uncertainties, allowing a determination independent gadolinium-capture result and an improvement precision measurement. With 217-day data set six detectors $2.9\text{...
This work reports a precise measurement of the reactor antineutrino flux using 2.2 million inverse beta decay (IBD) events collected with Daya Bay near detectors in 1230 days. The dominant uncertainty on neutron detection efficiency is reduced by 56% respect to previous through comprehensive calibration and detailed data simulation analysis. new average IBD yield determined be $(5.91\ifmmode\pm\else\textpm\fi{}0.09)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}43}\text{ }\text{...
The Daya Bay Experiment consists of eight identically designed detectors located in three underground experimental halls named as EH1, EH2, EH3, with 250, 265 and 860 meters water equivalent vertical overburden, respectively. Cosmic muon events have been recorded over a two-year period. rate is observed to be positively correlated the effective atmospheric temperature follow seasonal modulation pattern. correlation coefficient $\alpha$, describing how variation relates temperature, found...
The Daya Bay collaboration, with all eight of its anti-neutrino detectors functioning, returns to measuring the neutrino mixing angle ${\ensuremath{\theta}}_{13}$ through hydrogen capture neutrons produced in inverse-beta decay. new measurement improves significantly on uncertainty value measured using this method.