A5048777179- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Nuclear Physics and Applications
- Cosmology and Gravitation Theories
- Particle Detector Development and Performance
- Quantum, superfluid, helium dynamics
- Scientific Research and Discoveries
- Systemic Lupus Erythematosus Research
- Pulsars and Gravitational Waves Research
- Software-Defined Networks and 5G
- Histiocytic Disorders and Treatments
- Quantum Chromodynamics and Particle Interactions
- Nuclear reactor physics and engineering
- Particle accelerators and beam dynamics
- Sarcoidosis and Beryllium Toxicity Research
- Vascular Malformations and Hemangiomas
- Mechanical and Optical Resonators
- Tumors and Oncological Cases
- Lymphatic Disorders and Treatments
- Biomedical and Engineering Education
- Platelet Disorders and Treatments
Purdue University West Lafayette
2002-2024
Nantes Université
2024
Laboratoire de Physique Subatomique et des Technologies Associées
2024
Institut National de Physique Nucléaire et de Physique des Particules
2024
IMT Atlantique
2024
Xenon Pharmaceuticals (Canada)
2023-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
2024
University of Bologna
2024
Virginia Tech
2016-2024
Westlake University
2024
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 on the first search for nuclear recoils from dark matter in form of weakly interacting massive particles (WIMPs) with XENONnT experiment, which is based a two-phase time projection chamber sensitive liquid xenon mass 5.9 ton. During (1.09±0.03) ton yr exposure used this search, intrinsic ^{85}Kr and ^{222}Rn concentrations target are reduced to unprecedentedly low levels, giving an electronic recoil background rate (15.8±1.3) events/ton keV region interest. A blind analysis events...
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...
We report on a blinded analysis of low-energy electronic-recoil data from the first science run XENONnT dark matter experiment. Novel subsystems and increased 5.9 tonne liquid xenon target reduced background in (1, 30) keV search region to $(15.8 \pm 1.3)$ events/(tonne$\times$year$\times$keV), lowest ever achieved detector $\sim$5 times lower than XENON1T. With an exposure 1.16 tonne-years, we observe no excess above set stringent new limits solar axions, enhanced neutrino magnetic moment,...
Delayed single- and few-electron emissions plague dual-phase time projection chambers, limiting their potential to search for light-mass dark matter. This paper examines the origins of these events in XENON1T experiment. Characterization intensity delayed electron backgrounds shows that resulting are correlated, position, with high-energy can effectively be vetoed. In this work we extend previous S2-only analyses down a single electron. From analysis, after removing correlated backgrounds,...
We present the first measurement of nuclear recoils from solar <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mmultiscripts><a:mrow><a:mi mathvariant="normal">B</a:mi></a:mrow><a:mprescripts/><a:none/><a:mrow><a:mn>8</a:mn></a:mrow></a:mmultiscripts></a:mrow></a:math> neutrinos via coherent elastic neutrino-nucleus scattering with XENONnT dark matter experiment. The central detector is a low-background, two-phase time projection chamber 5.9 t sensitive...
A new measurement of the reactor antineutrino flux and energy spectrum by Daya Bay neutrino experiment is reported. The antineutrinos were generated six 2.9~GW$_{\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...
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 outline the unique opportunities and challenges in search for “ultraheavy” dark matter candidates with masses between roughly 10 TeV Planck scale m_{\rm pl} ≈ 10^{16} TeV. This mass range presents a wide relatively unexplored parameter space, rich space of possible models cosmic histories. emphasize that both current detectors new, targeted techniques, via direct indirect detection, are poised to contribute searches ultraheavy particle coming decade. highlight need new developments this...
The multi-staged XENON program at INFN Laboratori Nazionali del Gran Sasso aims to detect dark matter with two-phase liquid xenon time projection chambers of increasing size and sensitivity. XENONnT experiment is the latest detector in program, planned be an upgrade its predecessor XENON1T. It features active target 5.9 tonnes cryogenic (8.5 total mass cryostat). expected extend sensitivity WIMP by more than order magnitude compared XENON1T, thanks larger significantly reduced background,...
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...
We present results on the search for double-electron capture ($2\nu\text{ECEC}$) of $^{124}$Xe and neutrinoless double-$\beta$ decay ($0\nu\beta\beta$) $^{136}$Xe in XENON1T. consider captures from K- up to N-shell $2\nu\text{ECEC}$ signal model measure a total half-life $T_{1/2}^{2\nu\text{ECEC}}=(1.1\pm0.2_\text{stat}\pm0.1_\text{sys})\times 10^{22}\;\text{yr}$ with $0.87\;\text{kg}\times\text{yr}$ isotope exposure. The statistical significance is $7.0\,\sigma$. use XENON1T data...
We search for dark matter (DM) with a mass [3,12] GeV/c^{2} using an exposure of 3.51 tonne year the XENONnT experiment. consider spin-independent DM-nucleon interactions mediated by heavy or light mediator, spin-dependent DM-neutron interactions, momentum-dependent DM scattering, and mirror DM. Using lowered energy threshold compared to previous weakly interacting massive particle search, blind analysis [0.5, 5.0] keV nuclear recoil events reveals no significant signal excess over...
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...
We deployed a small, 80kg, antineutrino detector based on solid plastic scintillator, called MiniCHANDLER for nearly three months at distance of 25m from 2.9GW thermal power reactor core the North Anna Nuclear Generating Station. report detection an signal resulting inverse beta decay 5.5 sigma significance with no overburden and minimal shielding. This result also demonstrates that 3D segmentation can be used to significantly improve noise ratio, in this case by factor 4. In addition,...
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.
Abstract The precision in reconstructing events detected a dual-phase time projection chamber depends on an homogeneous and well understood electric field within the liquid target. In XENONnT TPC homogeneity is achieved through double-array cage, consisting of two nested arrays shaping rings connected by easily accessible resistor chain. Rather than being to gate electrode, topmost ring independently biased, adding degree freedom tune during operation. Two-dimensional finite element...
Abstract We characterize single- and few-electron backgrounds that are observed in dual-phase liquid xenon time projection chambers at timescales greatly exceeding a maximum drift after an interaction. These instrumental limit detector's sensitivity to dark matter cosmogenic neutrinos. Using the ∼ 150 g detector Purdue University, we investigate how these backgrounds, produced 122 keV 57 Co Compton interactions, behave under different conditions. find rates of signals follow power-laws with...
Multiple viable theoretical models predict heavy dark matter particles with a mass close to the Planck mass, range relatively unexplored by current experimental measurements. We use 219.4 days of data collected XENON1T experiment conduct blind search for signals from multiply interacting massive (MIMPs). Their unique track signature allows targeted analysis only 0.05 expected background events muons. Following unblinding, we observe no signal candidate events. This Letter places strong...
This Letter reports the first measurement of high-energy reactor antineutrinos at Daya Bay, with nearly 9000 inverse beta decay candidates in prompt energy region 8-12 MeV observed over 1958 days data collection. A multivariate analysis is used to separate 2500 signal events from background statistically. The hypothesis no neutrino above 10 rejected a significance 6.2 standard deviations. 29% antineutrino flux deficit 8-11 compared recent model prediction. We provide unfolded spectrum 7 as...
In this work, we expand on the XENON1T nuclear recoil searches to study individual signals of dark matter interactions from operators up dimension eight in a chiral effective field theory (ChEFT) and model inelastic (iDM). We analyze data two science runs detector totaling <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mn>1</a:mn><a:mtext> </a:mtext><a:mtext> </a:mtext><a:mi mathvariant="normal">t</a:mi><a:mo>×</a:mo><a:mi>yr</a:mi></a:mrow></a:math>...
Coherent elastic neutrino-nucleus scattering (<a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mi>CE</a:mi><a:mi>ν</a:mi><a:mi>NS</a:mi></a:mrow></a:math>) provides a unique probe for neutrino properties beyond the Standard Model physics. The reactor liquid xenon coherent experiment (RELICS), proposed program using time projection chamber technology, aims to investigate <c:math xmlns:c="http://www.w3.org/1998/Math/MathML"...
Abstract The XENONnT detector uses the latest and largest liquid xenon-based time projection chamber (TPC) operated by XENON Collaboration, aimed at detecting Weakly Interacting Massive Particles conducting other rare event searches. data acquisition (DAQ) system constitutes an upgraded expanded version of XENON1T DAQ system. For its operation, it relies predominantly on commercially available hardware accompanied open-source custom-developed software. three constituent subsystems detector,...