Xiao-Jun Bi
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View article: Galactic cosmic rays, propagation, gamma-rays and neutrinos
Galactic cosmic rays, propagation, gamma-rays and neutrinos Open
Plenary talk presented at the XXI International Workshop on Neutrino Telescopes - Padova 29 September - 3 October 2025 (https://agenda.infn.it/event/44606/)
View article: Letter to the editor: re-evaluating perioperative antibiotic strategies in mild-to-moderate acute cholecystitis: addressing unresolved questions from Park et al.’s randomized trial
Letter to the editor: re-evaluating perioperative antibiotic strategies in mild-to-moderate acute cholecystitis: addressing unresolved questions from Park et al.’s randomized trial Open
View article: Precise Measurement of Cosmic Ray Light and Helium Spectra above 0.1 Peta-electron-Volt
Precise Measurement of Cosmic Ray Light and Helium Spectra above 0.1 Peta-electron-Volt Open
We report a measurement of the cosmic ray helium energy spectrum in the energy interval 0.16 -- 13 PeV, derived by subtracting the proton spectrum from the light component (proton and helium) spectrum obtained with observations made by the…
View article: First detection of ultra-high energy emission from gamma-ray binary LS I +61 303
First detection of ultra-high energy emission from gamma-ray binary LS I +61 303 Open
We report the first detection of gamma-ray emission up to ultra-high-energy (UHE; $>$100 TeV) emission from the prototypical gamma-ray binary system LS I +61 303 using data from the Large High Altitude Air Shower Observatory (LHAASO). It i…
View article: Energy calibration of LHAASO-KM2A using the cosmic ray Moon shadow
Energy calibration of LHAASO-KM2A using the cosmic ray Moon shadow Open
We present a precise measurement of the westward, rigidity-dependent shift of the Moon's shadow using three and a half years of cosmic-ray data collected by the Kilometer Square Array (KM2A) of the Large High Altitude Air Shower Observator…
View article: A Giant Peanut-shaped Ultra-High-Energy Gamma-Ray Emitter Off the Galactic Plane
A Giant Peanut-shaped Ultra-High-Energy Gamma-Ray Emitter Off the Galactic Plane Open
Ultra-high-energy (UHE), exceeding 100 TeV (10^12 electronvolts), γ-rays manifests extreme particle acceleration in astrophysical sources. Recent observations by γ-ray telescopes, particularly by the Large High Altitude Air Shower Observat…
View article: An all-sky search for individual Primordial Black Hole burst with LHAASO
An all-sky search for individual Primordial Black Hole burst with LHAASO Open
View article: Tidal Suppression of Fuzzy Dark Matter Heating in Milky Way Satellite Galaxies
Tidal Suppression of Fuzzy Dark Matter Heating in Milky Way Satellite Galaxies Open
Many previous studies have imposed stringent constraints on the particle mass of fuzzy dark matter (FDM) by analyzing observations of Galactic satellite galaxies, which show no significant evidence of the heating effect predicted by FDM. H…
View article: Constraints on Lorentz-invariance violation in the neutrino sector from the ultrahigh-energy event KM3-230213A
Constraints on Lorentz-invariance violation in the neutrino sector from the ultrahigh-energy event KM3-230213A Open
Many quantum gravity theories predict deviations from Lorentz invariance, a foundational principle of modern physics, at energy scales exceeding the Planck scale. The presence of Lorentz invariance violation (LIV) would modify the dispersi…
View article: Study of ultra-high-energy gamma-ray source 1LHAASO J0056+6346u and its possible origins
Study of ultra-high-energy gamma-ray source 1LHAASO J0056+6346u and its possible origins Open
View article: Axion-like Dark Matter Search with Space-based Gravitational Wave Detectors
Axion-like Dark Matter Search with Space-based Gravitational Wave Detectors Open
We propose a novel modification to the optical benches of space-based gravitational wave detectors (SGWDs) to enable the detection of axion-like dark matter (ALDM)-induced birefringence without altering the polarization of inter-spacecraft…
View article: Unified Solar Modulation Potential for Same-Charge Cosmic Rays and Implications for Local Interstellar Spectra
Unified Solar Modulation Potential for Same-Charge Cosmic Rays and Implications for Local Interstellar Spectra Open
The energy spectra of cosmic rays (CRs) below tens of GeV are significantly modulated by solar activity within the heliosphere. To investigate the properties of Galactic CRs, it is important to determine the unmodulated local interstellar …
View article: Constraints on Lorentz Invariance Violation in Neutrino Sector from the Ultra-High-Energy Event KM3-230213A
Constraints on Lorentz Invariance Violation in Neutrino Sector from the Ultra-High-Energy Event KM3-230213A Open
Lorentz invariance is a fundamental symmetry of spacetime and serves as the cornerstone of modern physics, supporting the constancy of the speed of light. A crucial implication of this principle is that no particle can propagate faster tha…
View article: A Rigorous Solution to the Superluminal Issue in the Diffusion Equation
A Rigorous Solution to the Superluminal Issue in the Diffusion Equation Open
Superluminal propagation is an intrinsic problem in the diffusion equation and has not been effectively addressed for a long time. In this work, a rigorous solution to this issue is obtained under the assumption that particles undergo a ra…
View article: Broadband <i>γ</i>-Ray Spectrum of Supernova Remnant Cassiopeia A
Broadband <i>γ</i>-Ray Spectrum of Supernova Remnant Cassiopeia A Open
The core-collapse supernova remnant (SNR) Cassiopeia A (Cas A) is one of the brightest galactic radio sources with an angular radius of . Although no extension of this source has been detected in the γ -ray band, using more than 1…
View article: Constraining the Cosmic-Ray Energy Based on Observations of Nearby Galaxy Clusters by LHAASO
Constraining the Cosmic-Ray Energy Based on Observations of Nearby Galaxy Clusters by LHAASO Open
Galaxy clusters act as reservoirs of high-energy cosmic rays (CRs). As CRs propagate through the intracluster medium, they generate diffuse γ -rays detectable by arrays such as LHAASO. These γ -rays result from proton–proton (pp) collision…
View article: Interpreting the Extremely Diffuse Stellar Distribution of the Nube Galaxy through Fuzzy Dark Matter
Interpreting the Extremely Diffuse Stellar Distribution of the Nube Galaxy through Fuzzy Dark Matter Open
Recent observations have uncovered a remarkably flat and extremely diffuse stellar distribution within the almost dark dwarf galaxy Nube, posing a challenge to the standard cold dark matter scenario. In this study, we employ numerical simu…
View article: Tidal Formation of Dark Matter Deficit Diffuse Galaxy NGC 1052-DF2 by SIDM
Tidal Formation of Dark Matter Deficit Diffuse Galaxy NGC 1052-DF2 by SIDM Open
Observations have revealed a significant dark matter deficit in the ultradiffuse galaxy NGC 1052-DF2 (DF2). It is widely accepted that the formation of this unique galaxy can be attributed to the tidal stripping of its host galaxy, NGC 105…
View article: Measurement of Very-High-Energy Diffuse Gamma-Ray Emissions from the Galactic Plane with LHAASO-WCDA
Measurement of Very-High-Energy Diffuse Gamma-Ray Emissions from the Galactic Plane with LHAASO-WCDA Open
The diffuse Galactic gamma-ray emission is a very important tool used to study the propagation and interaction of cosmic rays in the Milky Way. In this Letter, we report the measurements of the diffuse emission from the Galactic plane-cove…
View article: Constraining the Cosmic-ray Energy Based on Observations of Nearby Galaxy Clusters by LHAASO
Constraining the Cosmic-ray Energy Based on Observations of Nearby Galaxy Clusters by LHAASO Open
Galaxy clusters act as reservoirs of high-energy cosmic rays (CRs). As CRs propagate through the intracluster medium, they generate diffuse $γ$-rays detectable by arrays such as LHAASO. These $γ$-rays result from proton-proton ($pp$) colli…
View article: Exploring Axion-Like Particle from observation of FSRQ Ton 599 by Fermi-LAT
Exploring Axion-Like Particle from observation of FSRQ Ton 599 by Fermi-LAT Open
High energy photons traveling through astrophysical magnetic fields have the potential to undergo oscillations with axion-like particles (ALPs), resulting in modifications to the observed photon spectrum. High energy $γ-$ray sources with s…
View article: Prediction of lithium isotope fluxes using data-driven production cross sections
Prediction of lithium isotope fluxes using data-driven production cross sections Open
Galactic cosmic rays (CRs) generally share common propagation features, leading to consistent spectral observations of secondary nuclei such as Li, Be, and B. However, the Li spectrum predicted by the CR diffusion coefficient inferred from…
View article: Broadband $γ$-ray spectrum of supernova remnant Cassiopeia A
Broadband $γ$-ray spectrum of supernova remnant Cassiopeia A Open
The core-collapse supernova remnant (SNR) Cassiopeia A (Cas A) is one of the brightest galactic radio sources with an angular radius of $\sim$ 2.5 $\arcmin$. Although no extension of this source has been detected in the $γ$-ray band, using…
View article: Exploring Constraints on Axion-like Particles with the Observations for blazar Mrk 501
Exploring Constraints on Axion-like Particles with the Observations for blazar Mrk 501 Open
Oscillations between axion-like particles (ALPs) and photons in astrophysical magnetic fields can lead to irregularities in the high energy gamma ray spectra of blazars. The magnetic field within the blazar jet plays a crucial role in shap…
View article: Precise Measurement of the Cosmic-Ray Spectrum and 〈ln A〉 by LHAASO: Connecting the Galactic to the Extragalactic Components
Precise Measurement of the Cosmic-Ray Spectrum and 〈ln A〉 by LHAASO: Connecting the Galactic to the Extragalactic Components Open
Recently, the LHAASO Collaboration has provided precise measurements of the cosmic rays (CRs) all-particle energy spectrum and mean logarithmic mass from 0.3 to 30 PeV. Combining the CR measurements by AMS-02 and DAMPE in space and th…
View article: An Enigmatic PeVatron in an Area around H <scp>ii</scp> Region G35.6−0.5
An Enigmatic PeVatron in an Area around H <span>ii</span> Region G35.6−0.5 Open
Identifying Galactic PeVatrons (PeV particle accelerators) from ultrahigh-energy (UHE, >100 TeV) γ -ray sources plays a crucial role in revealing the origin of Galactic cosmic rays. The UHE source 1LHAASO J1857+0203u is suggested to be ass…
View article: Constraining Anisotropic Diffusion between Geminga and Earth with the Cosmic-Ray Electron and Positron Spectrum
Constraining Anisotropic Diffusion between Geminga and Earth with the Cosmic-Ray Electron and Positron Spectrum Open
The gamma-ray halo around Geminga indicates significant suppression of cosmic-ray diffusion. One possible explanation for this phenomenon is the projection effect of slow diffusion perpendicular to the mean magnetic field (characterized by…
View article: Hadronic cross section measurements with the DAMPE space mission using 20 GeV-10 TeV cosmic-ray protons and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>He</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math>
Hadronic cross section measurements with the DAMPE space mission using 20 GeV-10 TeV cosmic-ray protons and Open
Precise direct cosmic-ray (CR) measurements provide an important probe to study the energetic particle sources in our Galaxy, and the interstellar environment through which these particles propagate. Uncertainties on hadronic models, ion-n…
View article: Retrieval of Terrestrial Water Storage Changes in Mainland China based on downscaling of GRACE/GRACE-FO data with machine learning models
Retrieval of Terrestrial Water Storage Changes in Mainland China based on downscaling of GRACE/GRACE-FO data with machine learning models Open
View article: MARS:A Metaphor-aware Adaptive Representative Synthesis Framework for Implicit Hate Speech Detection
MARS:A Metaphor-aware Adaptive Representative Synthesis Framework for Implicit Hate Speech Detection Open