A5088897019- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Particle Detector Development and Performance
- Atomic and Subatomic Physics Research
- Galaxies: Formation, Evolution, Phenomena
- Neutrino Physics Research
- Cosmology and Gravitation Theories
- Motor Control and Adaptation
- Biofield Effects and Biophysics
- Spectroscopy and Chemometric Analyses
- Tribology and Lubrication Engineering
- Biological and pharmacological studies of plants
- Neural and Behavioral Psychology Studies
- Radiation Detection and Scintillator Technologies
- Stellar, planetary, and galactic studies
- Relativity and Gravitational Theory
- Visual perception and processing mechanisms
- Gear and Bearing Dynamics Analysis
- Spectroscopy Techniques in Biomedical and Chemical Research
- High-Energy Particle Collisions Research
- Solar and Space Plasma Dynamics
- Astrophysics and Star Formation Studies
- Computational Physics and Python Applications
- Scientific Research and Discoveries
- Nuclear Physics and Applications
Sichuan University
2018-2025
Academia Sinica
2025
South China Normal University
2025
Xiamen University
2024
Institute of Physics, Academia Sinica
2018
We report results on the searches of weakly interacting massive particles (WIMPs) with sub-GeV masses (m_{χ}) via WIMP-nucleus spin-independent scattering Migdal effect incorporated. Analysis time-integrated (TI) and annual modulation (AM) effects CDEX-1B data are performed, 737.1 kg day exposure 160 eVee threshold for TI analysis, 1107.5 250 AM analysis. The sensitive windows in m_{χ} expanded by an order magnitude to lower DM New limits σ_{χN}^{SI} at 90% confidence level derived as...
We report the first results of a light weakly interacting massive particles (WIMPs) search from CDEX-10 experiment with 10 kg germanium detector array immersed in liquid nitrogen at China Jinping Underground Laboratory physics data size 102.8 day. At an analysis threshold 160 eVee, improved limits 8×10^{-42} and 3×10^{-36} cm^{2} 90% confidence level on spin-independent spin-dependent WIMP-nucleon cross sections, respectively, WIMP mass (m_{χ}) 5 GeV/c^{2} are achieved. The lower reach m_{χ}...
Dark matter direct detection experiments mostly operate at deep underground laboratories. It is necessary to consider shielding effect of the Earth, especially for dark particles interacting with a large cross section. We analyzed and simulated Earth China Jinping Underground Laboratory (CJPL) simulation package, CJPL Shielding Simulation code (CJPL_ESS), which applicable other locations. The further constraints on $\ensuremath{\chi}\text{\ensuremath{-}}\mathrm{N}$ section exclusion regions...
We report constraints on the dark photon effective kinetic mixing parameter (${\kappa}$) with data taken from two ${p}$-type point-contact germanium detectors of CDEX-10 experiment at China Jinping Underground Laboratory. The 90\% confidence level upper limits ${\kappa}$ solar 205.4 kg-day exposure are derived, probing new space masses (${m_V}$) 10 to 300 eV/${c^2}$ in direct detection experiments. Considering as cosmological matter, ${m_V}$ 0.1 4.0 keV/${c^2}$ set 449.6 data, a minimum...
After decades of experimental efforts, the DAMA/LIBRA(DL) annual modulation (AM) analysis on <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>χ</a:mi><a:mi mathvariant="normal">N</a:mi></a:math> (WIMP dark matter interactions nucleus) channel remains only one which can be interpreted as positive signatures. This has been refuted by numerous time-integrated (TI) and AM analysis. It shown that <d:math xmlns:d="http://www.w3.org/1998/Math/MathML"...
We present novel constraints on boosted light dark matter particles (denoted as ``$\ensuremath{\chi}$'') from evaporating primordial black holes (PBHs) using $205.4\text{ }\text{ }\mathrm{kg}\ifmmode\cdot\else\textperiodcentered\fi{}\mathrm{day}$ data the China Jinping Underground Laboratory's CDEX-10 p-type point contact germanium detector with a 160 eVee analysis threshold. $\ensuremath{\chi}$ PBHs masses ranging $1\ifmmode\times\else\texttimes\fi{}{10}^{15}\text{ }\mathrm{g}$ to...
A search for exotic dark matter (DM) in the sub-GeV mass range has been conducted using 205 kg•day data taken from a p-type point contact germanium detector of CDEX-10 experiment at China Jinping underground laboratory.New low-mass searching channels, neutral current fermionic DM absorption (χ + → ν A) and DM-nucleus 3→2 scattering χ φ A), have analyzed with an energy threshold 160 eVee.No significant signal was found, thus new limits on DM-nucleon interaction cross section are set both...
Abstract Based on the newly acquired dense gas observations from JCMT MALATANG survey and X-ray data Chandra, we explore correlation between hot HCN J = 4 → 3 HCO + emission for first time at subkiloparsec scale of five nearby star-forming galaxies, namely M82, M83, IC 342, NGC 253, 6946. We find that both line luminosity show a statistically significant with 0.5−2 keV diffuse ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msubsup> <mml:mrow>...
We report in situ neutron background measurements at the Kuo-Sheng Reactor Neutrino Laboratory (KSNL) by a hybrid detector (HND) with data size of 33.8 days under shielding configurations identical to those used during neutrino physics taking. The HND consists BC-501A liquid and BC-702 phosphor powder scintillation detectors, which are sensitive both fast thermal neutrons, respectively. Neutron-induced events for two channels identified differentiated pulse shape analysis, such that...
We operated a p-type point contact high purity germanium (PPCGe) detector (CDEX-1B, 1.008 kg) in the China Jinping Underground Laboratory (CJPL) for 500.3 days to search neutrinoless double beta ($0\nu\beta\beta$) decay of $^{76}$Ge. A total 504.3 kg $\cdot$ day effective exposure data was accumulated. The anti-coincidence and multi/single-site event (MSE/SSE) discrimination methods were used suppress background energy region interest (ROI, $1989-2089$ keV this work) with factor 23. level...
Dark matter (DM) is a major constituent of the Universe. However, no definite evidence DM particles (denoted as ``$\chi$") has been found in direct detection (DD) experiments to date. There novel concept detecting $\chi$ from evaporating primordial black holes (PBHs). We search for emitted PBHs by investigating their interaction with target electrons. The examined PBH masses range 1$\times$10$^{15}$ 7$\times$10$^{16}$ g under current limits abundance $f_{PBH}$. Using 205.4 kg$\cdot$day data...
We report new constraints on light dark matter (DM) boosted by blazars using the 205.4 kg day data from CDEX-10 experiment located at China Jinping Underground Laboratory. Two representative blazars, TXS 0506+56 and BL Lacertae are studied. The results derived exclude DM-nucleon elastic scattering cross sections $4.6\times 10^{-33}\ \rm cm^2$ to $1\times10^{-26}\ for DM masses between 10 keV 1 GeV, $2.4\times 10^{-34}\ same range of masses. correspond best sensitivities among solid-state...
We present the first results of search for sub-MeV fermionic dark matter absorbed by electron targets Germanium using 205.4~kg$\cdot$day data collected CDEX-10 experiment, with analysis threshold 160~eVee. No significant (DM) signals over background are observed. Results presented as limits on cross section DM--electron interaction. new constraints in DM range 0.1--10 keV/$c^2$ vector and axial-vector The upper limit is set to be $\rm 5.5\times10^{-46}~cm^2$ interaction,...
We present the first limit on $g_{A\gamma}$ coupling constant using Bragg-Primakoff conversion based an exposure of 1107.5 kg days data from CDEX-1B experiment at China Jinping Underground Laboratory. The are consistent with null signal hypothesis, and no excess signals observed. Limits $g_{A\gamma}<2.08\times10^{-9}$ GeV$^{-1}$ (95\% C.L.) derived for axions mass up to 100 eV/$c^2$. Within hadronic model KSVZ, our results exclude axion $>5.3~\rm{eV}/c^2$ 95\% C.L.
After decades of experimental efforts, the DAMA/LIBRA(DL) annual modulation (AM) analysis on ${\chi}$N (WIMP Dark Matter interactions nucleus) channel remains only one which can be interpreted as positive signatures. This has been refuted by numerous time-integrated (TI) and AM analysis. It shown that ${\chi}$e with electrons) alone is not compatible DL data. We expand investigations performing an addition long-range short-range to ${\chi}$N, derived using frozen-core approximation method....
During the planetary gearbox design process, issue of light-weighting has been studied using various methods. To get better results from light-weighting, it is necessary for new methods to be considered deal with this problem. This study proposes multi-strategy optimized sparrow search algorithm (MSOSSA) that employs five strategies improve ability generate high-quality initial solutions, convergence and speed, quality solution. In application, volume reduced by 6.39%, difference in ratio...
We present improved germanium-based constraints on sub-GeV dark matter via matter--electron ($χ$-$e$) scattering using the 205.4 kg$\cdot$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...
A search for exotic dark matter (DM) in the sub-GeV mass range has been conducted using 205 kg$\cdot$day data taken from a p-type point contact germanium detector of CDEX-10 experiment at China Jinping underground laboratory. New low-mass searching channels, neutral current fermionic DM absorption ($χ+A\rightarrow ν+A$) and DM-nucleus 3$\rightarrow$2 scattering ($χ+χ+A\rightarrow ϕ+A$), have analyzed with an energy threshold 160 eVee. No significant signal was found. Thus new limits on...