A5113401912- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Astrophysics and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Black Holes and Theoretical Physics
- Particle Detector Development and Performance
- Computational Physics and Python Applications
- Pulsars and Gravitational Waves Research
- Particle Accelerators and Free-Electron Lasers
- Advanced NMR Techniques and Applications
- Radio Astronomy Observations and Technology
- Nuclear physics research studies
- Advanced Algebra and Geometry
- Solar and Space Plasma Dynamics
- Atomic and Subatomic Physics Research
- Experimental and Theoretical Physics Studies
- Algebraic and Geometric Analysis
- Radiation Therapy and Dosimetry
- Coding theory and cryptography
- Scientific Research and Discoveries
- Precipitation Measurement and Analysis
- Global Educational Policies and Reforms
Institute of High Energy Physics
2015-2025
Yunnan University
2023-2025
Chinese Academy of Sciences
2020-2025
Hubei University
2024
Gansu Great Wall Electrical and Electronics Engineering Research Institute
2024
Budker Institute of Nuclear Physics
2024
Siberian Branch of the Russian Academy of Sciences
2024
COMSATS University Islamabad
2024
China University of Geosciences
2024
Institute of Business Administration Karachi
2024
The Belle detector at the KEKB electron-positron collider has collected almost 1 billion Y(4S) events in its decade of operation. Super-KEKB, an upgrade is under construction, to increase luminosity by two orders magnitude during a three-year shutdown, with ultimate goal 8E35 /cm^2 /s luminosity. To exploit increased luminosity, been proposed. A new international collaboration Belle-II, being formed. Technical Design Report presents physics motivation, basic methods accelerator upgrade, as...
High-energy photons from the Crab Nebula The contains a pulsar that excites surrounding gas to emit high-energy radiation. combination of pulsar's youth and nearby location makes nebula brightest gamma-ray source in sky. LHAASO Collaboration report observations this at energies tera– peta–electron volts, extending spectrum prototypical object. They combine these data with lower model physics emission process. multiwave-length can be explained by synchrotron radiation inverse Compton...
Abstract We present the first catalog of very-high-energy and ultra-high-energy gamma-ray sources detected by Large High Altitude Air Shower Observatory. The was compiled using 508 days data collected Water Cherenkov Detector Array from 2021 March to 2022 September 933 recorded Kilometer Squared 2020 January September. This represents main result most sensitive large coverage survey sky above 1 TeV, covering decl. −20° 80°. In total, contains 90 with an extended size smaller than 2° a...
The diffuse Galactic γ-ray emission, mainly produced via interactions between cosmic rays and the interstellar medium and/or radiation field, is a very important probe of distribution, propagation, interaction in Milky Way. In this Letter, we report measurements γ from plane 10 TeV 1 PeV energies, with square kilometer array Large High Altitude Air Shower Observatory (LHAASO). Diffuse emissions inner (15°<l<125°, |b|<5°) outer (125°<l<235°, are detected 29.1σ 12.7σ significance,...
We present the measurements of all-particle energy spectrum and mean logarithmic mass cosmic rays in range 0.3-30 PeV using data collected from LHAASO-KM2A between September 2021 December 2022, which is based on a nearly composition-independent reconstruction method, achieving unprecedented accuracy. Our analysis reveals position knee at 3.67±0.05±0.15 PeV. Below knee, spectral index found to be -2.7413±0.0004±0.0050, while above it -3.128±0.005±0.027, with sharpness transition measured...
We report the discovery of a UHE gamma-ray source, LHAASO J2108+5157, by analyzing LHAASO-KM2A data 308.33 live days. Significant excess induced showers is observed in both energy bands 25-100 TeV and $\gt$100 with 9.5 sigma 8.5 sigma, respectively. This source not significantly favored as an extensive angular extension smaller than point-spread function KM2A. The measured spectrum from 20 to 200 can be approximately described power-law index -2.83$\pm$ 0.18stat. A harder demanded at lower...
Recently, the LHAASO Collaboration published detection of 12 ultrahigh-energy γ-ray sources above 100 TeV, with highest energy photon reaching 1.4 PeV. The first PeV γ rays from astrophysical may provide a very sensitive probe effect Lorentz invariance violation (LIV), which results in decay high-energy superluminal scenario and hence sharp cutoff spectrum. Two are studied this work. No signature existence LIV is found their spectra, lower limits on scale derived. Our show that first-order...
The diffuse Galactic gamma-ray emission is a very important tool used to study the propagation and interaction of cosmic rays in Milky Way. In this Letter, we report measurements from plane---covering longitudes 15\ifmmode^\circ\else\textdegree\fi{} 235\ifmmode^\circ\else\textdegree\fi{} latitudes $\ensuremath{-}5\ifmmode^\circ\else\textdegree\fi{}$ $+5\ifmmode^\circ\else\textdegree\fi{}$, an energy range 1 25 TeV---made with Water Cherenkov Detector Array (WCDA) Large High Altitude Air...
Abstract Identifying Galactic PeVatrons (PeV particle accelerators) from ultrahigh-energy (UHE, >100 TeV) γ -ray sources plays a crucial role in revealing the origin of cosmic rays. The UHE source 1LHAASO J1857+0203u is suggested to be associated with HESS J1858+020, which may attributed possible PeVatron candidate supernova remnant (SNR) G35.6−0.4 or H ii region G35.6−0.5. We perform detailed analysis on very-high-energy and emissions toward this data Large High Altitude Air Shower...
Three new seco-labdane diterpenoids, named nudifloids W-Y (1-3), along with twelve known diterpenoids (4-15) and one sesquiterpenoid (16) were isolated from the stems leaves of Callicarpa nudiflora. The chemical structures compounds 1-3 determined by 1D 2D NMR, HR-ESI-MS, electronic circular dichroism (ECD). remaining thirteen comparing their spectral data those reported in literature. All screened for anti-inflammatory activity analyzing detection lactate dehydrogenase (LDH) release J771A.1...
Objective: To assess the time efficiency of computed tomography (CT) and magnetic resonance imaging (MRI) multimodal scanning protocols in assessment acute ischemic stroke (AIS), with potential implications for craniocerebral emergency management. Methods: A retrospective analysis was conducted to workflows CT MRI AIS. The total examination time, derived from DICOM source data, encompassed pre-scan waiting periods, sequence acquisition times, image reconstruction durations. In addition,...
Abstract A sub-array of the Large High Altitude Air Shower Observatory (LHAASO), KM2A is mainly designed to observe a large fraction northern sky hunt for γ-ray sources at energies above 10 TeV. Even though detector construction still underway, half array has been operating stably since end 2019. In this paper, we present data analysis pipeline and first observation Crab Nebula, standard candle in very high energy astronomy. We detect signals from Nebula both ranges 100 TeV with...
We report the discovery of a new unidentified extended $γ$-ray source in Galactic plane named LHAASO J0341+5258 with pre-trial significance 8.2 standard deviations above 25 TeV. The best fit position is R.A.$=55.34^{\circ}\pm0.11^{\circ}$ and Dec$=52.97^{\circ}\pm0.07^{\circ}$. angular size $0.29^\circ \pm 0.06^\circ_{stat} \pm0.02^\circ_{sys}$. flux TeV about $20\%$ Crab Nebula. Although power-law spectrum from 10 to 200 photon index $α=2.98 0.19_{stat} 0.02_{sys}$ not excluded, data...
For decades, supernova remnants (SNRs) have been considered the prime sources of Galactic Cosmic rays (CRs). But whether SNRs can accelerate CR protons to PeV energies and thus dominate flux up knee is currently under intensive theoretical phenomenological debate. The direct test ability operate as PeVatrons be provided by ultrahigh-energy (UHE; $E_\gamma \geq 100$~TeV) $\gamma$-rays. In this context, historical SNR Cassiopeia A (Cas A) one most promising target for UHE observations. This...
The Wide Field-of-View Cherenkov Telescope Array (WFCTA) and the Water Detector Arrays (WCDA) of LHAASO are designed to work in combination for measuring energy spectra various cosmic ray species over a very wide range from few TeV 10 PeV. calibration WCDA can be achieved with proven technique westward shift Moon shadow galactic rays due geomagnetic field. This deflection angle $\Delta$ is inversely proportional rays. precise measurements shifts by allows us calibrate its scale energies as...
In the Large High Altitude Air Shower Observatory (LHAASO), square kilometer array, with 5249 electromagnetic particle detectors (EDs) and 1188 muon detectors, is deployed to explore gamma-ray sources above 30 TeV unprecedented sensitivity measure primary cosmic rays in energy range from 10 100 PeV. The energetic particles produced by extensive air showers can serve as a continuously available source for calibration of numerous EDs over large area. this study, detector untriggered...
The nearby radio galaxy M87 is a very-high-energy (VHE) gamma-ray emitter established by observations with ground-based detectors. Here we report the long-term monitoring of from 2021 to 2024 Large High Altitude Air Shower Observatory (LHAASO). has been detected LHAASO statistical significance $\sim 9\sigma$. observed energy spectrum extends 20 TeV, possible hardening at 20$ TeV and then clear softening higher energies. Assuming that intrinsic described single power law up tight upper bound...