Jifang Zhou
A5067515764- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Atomic and Subatomic Physics Research
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Ferroelectric and Piezoelectric Materials
- Microwave Dielectric Ceramics Synthesis
- Hemoglobinopathies and Related Disorders
- Acoustic Wave Resonator Technologies
- Multiple Myeloma Research and Treatments
- Particle Detector Development and Performance
- Chronic Lymphocytic Leukemia Research
- Multiple and Secondary Primary Cancers
- Breast Cancer Treatment Studies
- Nuclear physics research studies
- Global Cancer Incidence and Screening
- Pharmaceutical Practices and Patient Outcomes
- Iron Metabolism and Disorders
- Acute Lymphoblastic Leukemia research
- Lymphoma Diagnosis and Treatment
- Multiferroics and related materials
- Quantum Chromodynamics and Particle Interactions
- Cancer Risks and Factors
- Healthcare Systems and Reforms
- Gamma-ray bursts and supernovae
China Pharmaceutical University
2019-2025
Yalong Hydro (China)
2010-2024
Hangzhou First People's Hospital
2022-2024
Nanjing Normal University
2023
Shanghai Institute of Applied Physics
2023
Chinese Academy of Sciences
2023
Nanjing University of Chinese Medicine
2023
Campbell Collaboration
2023
China Institute of Atomic Energy
2022-2023
Zhejiang University
2023
We report a new search of weakly interacting massive particles (WIMPs) using the combined low background data sets in 2016 and 2017 from PandaX-II experiment China. The latest set contains exposure 77.1 live day, with reduced to level 0.8$\times10^{-3}$ evt/kg/day, improved by factor 2.5 comparison previous run 2016. No excess events were found above expected background. With total 5.4$\times10^4$ kg most stringent upper limit on spin-independent WIMP-nucleon cross section was for WIMP mass...
Antibiotics are recommended before certain dental procedures in patients with select comorbidities to prevent serious distant site infections.To assess the appropriateness of antibiotic prophylaxis using Truven, a national integrated health claims database.Retrospective cohort study. Dental visits from 2011 2015 were linked medical and prescription 2009 2015. The dates analysis August 2018 January 2019. Participants US commercial insurance without hospitalization or extraoral infection 14...
The PandaX-4T liquid xenon detector at the China Jinping Underground Laboratory is used to measure 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> neutrino flux by detecting neutrinos through coherent scattering with nuclei. Data samples requiring coincidence of scintillation and ionization...
We report constraints on light dark matter through its interactions with shell electrons in the PandaX-II liquid xenon detector a total $46.9\text{ }\text{ }\mathrm{tonnes}/\mathrm{day}$ exposure. To effectively search for these very low energy electron recoils, ionization-only signals are selected from data. 1821 candidates identified within an ionization signal range between 50 and 75 photoelectrons, corresponding to mean electronic recoil 0.08 0.15 keV. The 90% C.L. exclusion limit...
We present PandaX-II constraints on candidate WIMP-nucleon effective interactions involving the nucleon or WIMP spin, including, in addition to standard axial spin-dependent (SD) scattering, various couplings among vector and currents, magnetic electric dipole moments, tensor interactions. The data set corresponding a total exposure of 54-ton-days is reanalyzed determine as function mass isospin coupling. obtain cross section bounds $\rm 1.6 \times 10^{-41} cm^2$ 9.0 10^{-42} ($90\%$ c.l.)...
We report the first dark matter search results using commissioning data from PandaX-4T. Using a time projection chamber with 3.7 tonne of liquid xenon target and an exposure 0.63 tonne·year, 1058 candidate events are identified within approximate nuclear recoil energy window between 5 100 keV. No significant excess over background is observed. Our set stringent limit to matter-nucleon spin-independent interactions, lowest excluded cross section (90% C.L.) 3.8×10^{-47} cm^{2} at mass 40 GeV/c^{2}.
We report a novel search for the cosmic-ray boosted dark matter using 100 tonne·day full dataset of PandaX-II detector located at China Jinping Underground Laboratory. With extra energy gained from cosmic rays, sub-GeV particles can produce visible recoil signals in detector. The diurnal modulations rate and spectrum are utilized to further enhance signal sensitivity. Our result excludes matter-nucleon elastic scattering cross section between 10^{-31} 10^{-28} cm^{2} masses 0.1 MeV/c^{2}...
We report a search on sub-MeV fermionic dark matter absorbed by electrons with an outgoing active neutrino using the 0.63 tonne year exposure collected PandaX-4T liquid xenon experiment. No significant signals are observed over expected background. The data interpreted into limits to effective couplings between such and electron. For axial-vector or vector interactions, our sensitivity is competitive in comparison existing astrophysical bounds decay of candidate photon final states. In...
We report the search results of light dark matter through its interactions with shell electrons and nuclei, using commissioning data from PandaX-4T liquid xenon detector. Low energy events are selected to have an ionization-only signal between 60 200 photoelectrons, corresponding a mean nuclear recoil 0.77 2.54 keV electronic 0.07 0.23 keV. With effective exposure 0.55 tonne$\cdot$year, we set most stringent limits within mass range 40 $\rm{MeV/c^2}$ 10 $\rm{GeV/c^2}$ for point-like...
A search for interactions from solar $^{8}\mathrm{B}$ neutrinos elastically scattering off xenon nuclei using PandaX-4T commissioning data is reported. The energy threshold of this further lowered compared with the previous dark matter, various techniques utilized to suppress background that emerges threshold. blind analysis performed on an effective exposure $0.48\text{ }\text{ }\mathrm{tonne}\text{ }\mathrm{year}$, and no significant excess events observed. Among results obtained...
IMPORTANCE Postoperative delirium is a common and impactful neuropsychiatric complication in patients undergoing coronary artery bypass grafting surgery. Cognitive training may enhance cognitive reserve, thereby reducing postoperative delirium. OBJECTIVE To determine whether preoperative reduces the incidence of grafting. DESIGN, SETTING, PARTICIPANTS This prospective, single-blind, randomized clinical trial was conducted at 3 university teaching hospitals southeastern China with enrollment...
Xe134 is a candidate isotope for neutrinoless double beta decay (0νββ) search. In addition, the two-neutrino case (2νββ) allowed by standard model of particle physics has not yet been observed. With 656-kg natural xenon in fiducial volume PandaX-4T detector, which contains 10.4% Xe134, and its initial 94.9-day exposure, we have established most stringent constraints on 2νββ 0νββ half-lives, with limits 2.8×1022 yr 3.0×1023 at 90% confidence level, respectively. The limit surpasses previously...
We search for nuclear recoil signals of dark matter models with a light mediator in PandaX-II, direct detection experiment the China Jinping underground laboratory. Using data collected 2016 and 2017 runs, corresponding to total exposure 54 ton day, we set upper limits on zero-momentum matter-nucleon cross section. These have strong dependence mass when it is comparable or below typical momentum transfer. apply our results constrain self-interacting mixing standard model particles, parameter...
We present improved germanium-based constraints on sub-GeV dark matter via matter-electron (χ-e) scattering using the 205.4 kg·day dataset from CDEX-10 experiment. Using a novel calculation technique, we attain predicted χ-e spectra observable in high-purity germanium detectors. In heavy mediator scenario, our results achieve 3 orders of magnitude improvement for m_{χ} larger than 80 MeV/c^{2} compared to previous results. also most stringent cross-section limit date among experiments...
The pathophysiological mechanisms by which venous congestion and hypotension lead to acute adverse kidney events after cardiac surgery with cardiopulmonary bypass have not been elucidated. We tested the hypothesis that intraoperative are associated injury disease.Primary exposures were defined central pressure ≥12, 16, or 20 mm Hg mean arterial ≤55, 65, 75 Hg. primary outcomes disease. Multivariable logistic regression Cox proportional hazard models used, adjusted for relevant confounding...
Breast cancer treatment has profoundly improved in China recently. However, trends disparities and transitions of early-stage between the US are not well known.
We present results on light weakly interacting massive particle (WIMP) searches with annual modulation (AM) analysis data from a 1-kg mass p-type point-contact germanium detector of the CDEX-1B experiment at China Jinping Underground Laboratory. Datasets total live time 3.2 yr within 4.2-yr span are analyzed threshold 250 eVee. Limits WIMP-nucleus (χ-N) spin-independent cross sections as function WIMP (m_{χ}) 90% confidence level (C.L.) derived using dark matter halo model. Within context...
Dentists prescribe 1 in 10 opioid prescriptions the U.S. When opioids are necessary, national guidelines recommend prescription of low-dose for a short duration. This study assesses appropriate prescribing by dentists before guideline implementation.The authors performed cross-sectional analysis population-based sample 542,958 commercial dental patient visits between 2011 and 2015 within Truven Health MarketScan Research Databases (data October 2018‒April 2019). Patients with recent...
We report the dark matter search results obtained using full 132 ton$\cdot$day exposure of PandaX-II experiment, including all data from March 2016 to August 2018. No significant excess events is identified above expected background. Upper limits are set on spin-independent matter-nucleon interactions. The lowest 90% confidence level exclusion cross section $2.2\times 10^{-46}$ cm$^2$ at a WIMP mass 30 GeV/$c^2$.
Fluorine is one of the most interesting elements in nuclear astrophysics, where ^{19}F(p,α)^{16}O reaction crucial importance for Galactic ^{19}F abundances and CNO cycle loss first generation Population III stars. As a day-one campaign at Jinping Underground Nuclear Astrophysics experimental facility, we report direct measurements essential ^{19}F(p,αγ)^{16}O channel. The γ-ray yields were measured over E_{c.m.}=72.4-344 keV, covering Gamow window; our energy 72.4 keV unprecedentedly low,...
The ^{13}C(α,n)^{16}O reaction is the main neutron source for slow-neutron-capture process in asymptotic giant branch stars and intermediate process. Direct measurements at astrophysical energies above-ground laboratories are hindered by extremely small cross sections vast cosmic-ray-induced background. We performed first consistent direct measurement range of E_{c.m.}=0.24 to 1.9 MeV using accelerators China Jinping Underground Laboratory Sichuan University. Our covers almost entire Gamow...
A bstract PandaX-4T is a ton-scale dark matter direct detection experiment using dual-phase TPC technique at the China Jinping Underground Laboratory. Various ultra-low background technologies have been developed and applied to material screening for PandaX-4T, including HPGe gamma spectroscopy, ICP-MS, NAA, radon emanation measurement system, krypton assay station, alpha system. Low materials were selected assemble detector. Surface treatment procedures investigated further suppress...