Xiaxin Ding
A5028348006- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Iron-based superconductors research
- Advanced Condensed Matter Physics
- Rare-earth and actinide compounds
- Physics of Superconductivity and Magnetism
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Topological Materials and Phenomena
- Magnetic and transport properties of perovskites and related materials
- Black Holes and Theoretical Physics
- Multiferroics and related materials
- Computational Physics and Python Applications
- Theoretical and Computational Physics
- Magnetism in coordination complexes
- Graphene research and applications
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- 2D Materials and Applications
- advanced mathematical theories
- Crystal Structures and Properties
- Particle Accelerators and Free-Electron Lasers
- Stochastic processes and statistical mechanics
- Inorganic Chemistry and Materials
Peking University
2023-2025
Shandong Academy of Agricultural Machinery Sciences
2025
City College of New York
2021-2024
National High Magnetic Field Laboratory
2017-2022
Idaho National Laboratory
2019-2022
Los Alamos National Laboratory
2017-2022
Nanjing University
2012-2021
Collaborative Innovation Center of Advanced Microstructures
2012-2020
The University of Texas at Dallas
2020
Center for Advanced Energy Studies
2020
Resistive and magnetic properties have been measured in BiS${}_{2}$-based samples CeO${}_{1\ensuremath{-}x}$F${}_{x}$BiS${}_{2}$ with a systematic substitution of O F ($0<x<0.6$). In contrast to the band-structure calculations, it is found that parent phase CeOBiS${}_{2}$ bad metal instead band insulator. By doping electrons into system, surprising find superconductivity appears together semiconducting normal state. This evolution clearly different from cuprate iron pnictide systems,...
The beta decay of the lightest charmed baryon $${\Lambda }_{c}^{+}$$ provides unique insights into fundamental mechanism strong and electro-weak interactions, serving as a testbed for investigating non-perturbative quantum chromodynamics constraining Cabibbo-Kobayashi-Maskawa (CKM) matrix parameters. This article presents first observation Cabibbo-suppressed }_{c}^{+}\to n{e}^{+}{\nu }_{e}$$ , utilizing 4.5 fb−1 electron-positron annihilation data collected with BESIII detector. A novel...
The search for new superconducting materials has been spurred on by the discovery of iron-based superconductors whose structure and composition is qualitatively different from cuprates. study one such material, KxFe2−ySe2 with a critical temperature 32 K, made more difficult fact that it separates into two phases—a dominant antiferromagnetic insulating phase K2Fe4Se5, minority precise as yet unclear. Here we perform electrical magnetization measurements, scanning electron microscopy...
We study the process e^{+}e^{-}→Λ_{c}^{+}Λ[over ¯]_{c}^{-} at twelve center-of-mass energies from 4.6119 to 4.9509 GeV using data samples collected by BESIII detector BEPCII collider. The Born cross sections and effective form factors (|G_{eff}|) are determined with unprecedented precision after combining single double-tag methods based on decay Λ_{c}^{+}→pK^{-}π^{+}. Flat around 4.63 obtained no indication of resonant structure Y(4630), as reported Belle, is found. In addition, oscillatory...
Based on 4.4 fb−1 of e+e− annihilation data collected at the center-of-mass energies between 4.60 and 4.70 GeV with BESIII detector BEPCII collider, pure W-boson-exchange decay Λc+→Ξ0K+ is studied a full angular analysis. The corresponding asymmetry measured for first time to be αΞ0K+=0.01±0.16(stat)±0.03(syst). This result reflects noninterference effect S- P-wave amplitudes. phase shift amplitudes has two solutions, which are δp−δs=−1.55±0.25(stat)±0.05(syst) rad or...
Domain wall motion is detected for the first time during transition to a ferroelastic and spin state ordered phase of crossover complex. Single-crystal X-ray diffraction resonant ultrasound spectroscopy (RUS) revealed two distinct symmetry-breaking transitions in mononuclear Mn
Pinned and mobile ferroelastic domain walls are detected in response to mechanical stress a Mn3+ complex with two-step thermal switching between the spin triplet quintet forms. Single-crystal X-ray diffraction resonant ultrasound spectroscopy on [MnIII(3,5-diCl-sal2(323))]BPh4 reveal three distinct symmetry-breaking phase transitions polar space group series Cc → Pc P1 P1(1/2). The transition mechanisms involve coupling structural state order parameters, Landau tricritical, first order,...
We perform for the first time an amplitude analysis of decay D+→KS0π+η and report observation D+→KS0a0(980)+ using 2.93 fb−1 e+e− collision data taken at a center-of-mass energy 3.773 GeV with BESIII detector. As only W-annihilation-free among D to a0(980) pseudoscalar, is ideal in extracting contributions W-emission amplitudes involving study final-state interactions. The absolute branching fraction measured be (1.27±0.04stat±0.03syst)%. fractions intermediate processes a0(980)+→π+η...
${\mathrm{Sm}\mathrm{B}}_{6}$ is a candidate topological Kondo insulator that displays surface conduction at low temperatures. Here, we perform torque magnetization measurements as means to detect de Haas--van Alphen (dHvA) oscillations in ${\mathrm{SmB}}_{6}$ crystals grown by aluminum flux. We find dHvA occur single containing embedded aluminum, originating from the flux used synthesize ${\mathrm{SmB}}_{6}$. Measurements on sample with multiple, unconnected inclusions show crystallizes...
Abstract Ferrotoroidal order, which represents a spontaneous arrangement of toroidal moments, has recently been found in few linear magnetoelectric materials. However, tuning moments these materials is challenging. Here, we report switching between ferritoroidal and ferrotoroidal phases by small magnetic field, chiral triangular-lattice magnet BaCoSiO 4 with tri-spin vortices. Upon applying observe multi-stair metamagnetic transitions, characterized equidistant steps the net moments. This...
A bstract Using 24.1 fb − 1 of e + collision data collected with the BESIII detector at BEPCII collider, Born cross sections and effective form factors $$ {e}^{+}{e}^{-}\to {\Sigma}^{+}{\overline{\Sigma}}^{-} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mi>e</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:mo>−</mml:mo> <mml:mo>→</mml:mo> <mml:mi>Σ</mml:mi> <mml:mover> <mml:mo>¯</mml:mo> </mml:mover> </mml:math> reaction are measured. The measurements performed...
A search for $\eta_c(2S)\to p\bar{p}K^+K^-$, together with measurement of branching fractions $\chi_{cJ(J=0,1,2)}\to p\bar{p}K^+K^-$ in the $\psi(3686) \to \gamma \eta_c(2S)$ and \chi_{cJ}$ radiative decays, is performed $(2712.4\pm14.3)\times 10^6$ $\psi(3686)$ events collected BESIII detector at BEPCII collider. An evidence found, a significance $3.3\sigma$. The product fraction $\mathcal{B}[\psi(3686)\to\gamma\eta_c(2S)]\cdot\mathcal{B}[\eta_c(2S)\to p\bar{p}K^+K^-]$ determined to be...
We measure the Born cross section for reaction <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:msup><a:mrow><a:mi>e</a:mi></a:mrow><a:mrow><a:mo>+</a:mo></a:mrow></a:msup><a:msup><a:mrow><a:mi>e</a:mi></a:mrow><a:mrow><a:mo>−</a:mo></a:mrow></a:msup><a:mo stretchy="false">→</a:mo><a:mi>η</a:mi><a:msub><a:mrow><a:mi>h</a:mi></a:mrow><a:mrow><a:mi>c</a:mi></a:mrow></a:msub></a:mrow></a:math> from <d:math xmlns:d="http://www.w3.org/1998/Math/MathML"...
Due to the short time, high labor intensity and workload of fruit vegetable harvesting, robotic harvesting instead manual operations is future. The accuracy object detection location directly related picking efficiency, quality speed fruit-harvesting robots. Because its low recognition accuracy, slow poor localization traditional algorithm cannot meet requirements automatic-harvesting increasingly evolving powerful deep learning technology can effectively solve above problems has been widely...
We study the electromagnetic Dalitz decay $J/\psi \to e^+e^- \pi^0$ using $(10087 \pm 44) \times 10^6$ $J/\psi$ events collected by \bes detector. The di-electron-invariant-mass dependent transition form factor of this is explored for first time. A significant resonant structure corresponding to $\rho/\omega$ resonance observed, which cannot be described existing theoretical models, due contributions from isospin-conserving \rho and isospin-volating \omega decays. observed $\rho$--$\omega$...
We present the first amplitude analysis and branching fraction measurement of decay $D^+_s\to \pi^+\pi^+\pi^-\pi^0\pi^0$, using $e^+e^-$ collision data collected with BESIII detector at center-of-mass energies between 4.128 4.226 GeV corresponding to an integrated luminosity 7.33 fb$^{-1}$, report observation pure $W$-annihilation $D_s^+ \to \omega\rho^+$ a $(0.99\pm0.08_{\rm stat}\pm0.07_{\rm syst})\%$. In comparison low significance $\mathcal{D}$ wave in \phi\rho^+$, dominance over...
We search for the leptonic decay $D^+\to e^+\nu_{e}$ using an $e^+e^-$ collision data sample with integrated luminosity of 20.3~fb$^{-1}$ collected BESIII detector at center-of-mass energy 3.773~GeV. No significant signal is observed and upper limit on branching fraction set as $9.7 \times 10^{-7}$, 90\% confidence level. Our order magnitude smaller than previous this mode.
Using data samples collected by the \mbox{BESIII} detector located at Beijing Electron Positron Collider, cross sections of process $e^+e^-\to f_{1}(1285)\pi^+\pi^-$ are measured forty-five center-of-mass energies from $3.808$ to $4.951 {\rm GeV}$. An investigation on section line shape is performed, and no significant structure observed.
Using $\psi(3686)\rightarrow \pi^{0} h_{c}$ decays from a data sample of $(27.12\pm0.14)\times10^{8}$ $\psi(3686)$ events collected by the BESIII detector at BEPCII collider, $h_c$ radiative to $\gamma\pi^{+}\pi^{-},~\gamma\pi^{+}\pi^{-}\eta,~\gamma2(\pi^{+}\pi^{-})$, and $\gamma p\bar{p}$ are observed for first time, each with significance greater than $5\sigma$. The corresponding branching fractions measured. Furthermore, intermediate states below 2.8 GeV/$c^{2}$ investigated, leading...
A bstract Based on 7.33 fb − 1 of e + collision data collected by the BESIII detector operating at BEPCII collider center-of-mass energies from 4.128 to 4.226 GeV, a search for Majorana neutrino ν m is conducted in lepton-number-violating decays $$ {D}_{\textrm{s}}^{+} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>D</mml:mi> <mml:mi>s</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> </mml:math> → h 0 . Here, represents K or π , and {K}_S^0 <mml:mi>K</mml:mi>...
By analyzing a $\psi(3686)$ data sample containing $(107.7\pm0.6)\times10^{6}$ events taken with the BESIII detector at BEPCII storage ring in 2009, $\chi_{c0}$ resonance parameters are precisely measured using $\chi_{c0,c2} \to \pi^+\pi^-/K^+K^-$ events. The mass of is determined to be $M(\chi_{c0})=(3415.67\pm0.07\pm0.06\pm0.07$)~MeV/$c^2$, and its full width $\Gamma(\chi_{c0})=(12.44\pm0.12\pm0.12)~{\rm MeV}$, where first uncertainty statistical, second systematic, third for comes from...
Utilizing 4.5 $fb^-$ of $e^+e^-$ annihilation data collected at center-of-mass energies ranging from 4599.53 MeV to 4698.82 by the BESIII detector BEPCII collider, we search for singly Cabibbo-suppressed hadronic decays $\Lambda_{c}^{+}\to\Sigma^{0} K^{+}\pi^{0}$ and $\Lambda_{c}^{+}\to\Sigma^{0}K^{+}\pi^+\pi^-$ with a single-tag method. No significant signals are observed both decays. The upper limits on branching fractions $90\%$ confidence level determined be $5.0\times 10^{-4}$...