A5023648582- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Computational Physics and Python Applications
- Particle Detector Development and Performance
- Cosmology and Gravitation Theories
- Atomic and Subatomic Physics Research
- Stochastic processes and statistical mechanics
- advanced mathematical theories
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Medical Imaging Techniques and Applications
- Advanced NMR Techniques and Applications
- Nuclear Materials and Properties
- Material Properties and Failure Mechanisms
- Geophysics and Gravity Measurements
- Astrophysics and Cosmic Phenomena
- Fluid Dynamics Simulations and Interactions
- Digital Radiography and Breast Imaging
- Earthquake Detection and Analysis
- Experimental and Theoretical Physics Studies
- Galaxies: Formation, Evolution, Phenomena
Sun Yat-sen University
2020-2025
Joint Institute for Nuclear Research
2024
Moscow Institute of Physics and Technology
2024
Institute of High Energy Physics
2017-2023
University of Michigan
2018-2023
Henan University
2023
Inner Mongolia University
2023
International Centre for Theoretical Physics Asia-Pacific
2020-2022
Chongqing University of Posts and Telecommunications
2015-2022
National Center for Theoretical Sciences, Physics Division
2012-2021
Using data samples collected with the BESIII detector at BEPCII collider, we measure Born cross section of ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}p\overline{p}$ 12 center-of-mass energies from 2232.4 to 3671.0 MeV. The corresponding effective electromagnetic form factor proton is deduced under assumption that electric and magnetic factors are equal $(|{G}_{E}|=|{G}_{M}|)$. In addition, ratio factors, $|{G}_{E}/{G}_{M}|$, $|{G}_{M}|$ extracted by fitting polar angle distribution...
We study the decays of anti-triplet charmed baryon state $(\Xi_c^0,\Xi_c^+,\Lambda_c^+)$ based on $SU(3)$ flavor symmetry. In particular, after predicting ${\cal B}(\Xi_c^0\to \Xi^-\pi^+)=(15.7 \pm 0.7)\times 10^{-3}$ and B}(\Xi_c^+\to\Xi^-\pi^+\pi^+)=(14.7\pm 8.4)\times 10^{-3}$, we extract that B}(\Xi_c^0\to\Lambda K^-\pi^+,\Lambda K^+K^-,\Xi^- e^+\nu_e)=(16.8\pm 2.3,0.45\pm 0.11,48.7\pm 17.4)\times B}(\Xi_c^+\to p K_s^0 K_s^0,\Sigma^+ K^-\pi^+,\Xi^0\pi^+\pi^0,\Xi^0 e^+\nu_e)=(1.3\pm...
A bstract We study the semileptonic and non-leptonic charmed baryon decays with SU(3) flavor symmetry, where baryons can be B c = (Ξ 0 , Ξ + Λ ), ′ ( Σ (++,+,0) (+,0) Ω cc ) or ccc . With n (′) denoted as octet (decuplet), we find that → ℓ ν are forbidden, while − only existing Cabibbo- allowed modes for respectively. predict rarely studied M decays, such $$ \mathrm{\mathcal{B}}\left({\Xi}_c^0\to {\Lambda}^0{\overline{K}}^0,{\Xi}_c^{+}\to {\Xi}^0{\pi}^{+}\right)=\left(8.3\pm 0.9,\ 8.0\pm...
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We present a systematic analysis for the rare baryonic exclusive decays of $\Lambda_b\to\Lambda l^+ l^- (l=e,\mu,\tau)$. study differential decay rates and di-lepton forward-backward, lepton polarization various CP asymmetries with new simple set form factors inspired by heavy quark effective theory. show that most observables are insensitive to non-perturbative QCD effects. To illustrate effect physics, we discuss our results in an explicit supersymmetric extension standard model, which...
We study the non-leptonic two-body weak decays of $\Lambda_c^+(2286)\to {\bf B}_n M$ with ${\bf B}_n$ ($M$) representing as baryon (meson) states. Based on $SU(3)$ flavor symmetry, we can describe most data reexamined by BESIII Collaboration higher precisions. However, our result ${\cal B}(\Lambda_c^+ \to p\pi^0)=(5.6\pm 1.5)\times 10^{-4}$ is larger than current experimental limit $3\times10^{-4}$ (90\% C.L.) BESIII. In addition, find that \Sigma^+ K^0)=(8.0\pm 1.6)\times 10^{-4}$,...
We study direct CP violating asymmetries (CPAs) in the two-body $\Lambda_b$ decays of $\Lambda_b\to pM(V)$ with $M(V)=K^-(K^{*-})$ and $\pi^-(\rho^-)$ based on generalized factorization method. After simultaneously explaining observed decay branching ratios (p K^-\,,\; p \pi^-)$ ${\cal R}_{\pi K}\equiv {\cal B}(\Lambda_b\to \pi^-)/{\cal K^-)$ being $0.84\pm 0.09$, we find that their corresponding CPAs are $(5.8\pm 0.2,\,-3.9\pm 0.2)\%$ standard model (SM), comparison $(-5^{+26}_{-~5},\,...
Using a data set of 2.93 fb$^{-1}$ taken at center-of-mass energy $\sqrt{s}$ = 3.773 GeV with the BESIII detector BEPCII collider, we perform search for an extra U(1) gauge boson, also denoted as dark photon. We examine initial state radiation reactions $e^+e^-\rightarrow e^+e^-\gamma_{\rm ISR}$ and \mu^+\mu^-\gamma_{\rm this search, where photon would appear enhancement in invariant mass distribution leptonic pairs. observe no obvious range between 1.5 3.4 GeV/$c^{2}$ 90% confidence level...
Using data samples of ${e}^{+}{e}^{\ensuremath{-}}$ collisions collected with the BESIII detector at eight center-of-mass energy points between 3.49 and 3.67 GeV, corresponding to an integrated luminosity $670\text{ }\text{ }{\mathrm{pb}}^{\ensuremath{-}1}$, we present upper limits Born cross sections effective form factor for process ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{\mathrm{\ensuremath{\Omega}}}^{\ensuremath{-}}{\overline{\mathrm{\ensuremath{\Omega}}}}^{+}$. A fit using...
We update the analysis on muon polarization from ${K}_{\ensuremath{\mu}3}$ decays normal to decay plane due $\mathrm{CP}$ violation in various models. find that could reach a level of ${10}^{\ensuremath{-}3}$ multi-Higgs-boson and leptoquark models without conflicting with experimental constraints.
We report a search for dark photon using $14.9$~fb$^{-1}$ of $e^+e^-$ annihilation data taken at center-of-mass energies from 4.13 to 4.60~GeV with the BESIII detector operated BEPCII storage ring. The is assumed be produced in radiative process and predominantly decay into light matter particles, which escape undetected. mass range 1.5 2.9~GeV scanned candidate, no significant signal observed. dependent upper limits 90$\%$ confidence level on coupling strength parameter $\epsilon$ an...
We study the dilepton forward–backward and longitudinal, normal transverse lepton polarization asymmetries in heavy baryon decays of Λb→Λl+l−. show that have a less dependence on nonperturbative QCD effects. In standard model, we find integrated (FBAs) three components polarizations sum rule approach (pole model) are −0.13(−0.12) (58.3,−9.4,−0.07)% ((58.3,−12.6,−0.07)%) for Λb→Λμ+μ− −0.04(−0.03) (10.9,−10.0,−0.39)% ((10.9,−0.2,−0.34)%) Λb→Λτ+τ−, respectively.
We study the direct $CP$ violation in ${B}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}p\overline{p}{K}^{(*)\ifmmode\pm\else\textpm\fi{}}$ decays standard model. point out that these three-body baryonic $B$ can be important tools for detecting charged system, which there are no conclusive signatures yet. In particular, we show $CP$-violating asymmetry ${B}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}p\overline{p}{K}^{*\ifmmode\pm\else\textpm\fi{}}$ is around 22%, supports...
Within the light front framework, we calculate form factors for $B\to\gamma$ transitions directly in entire physical range of momentum transfer. Using these factors, study radiative decays $B\to l\nu_l\gamma$ and $B_{s(d)}\to\nu\bar{\nu}\gamma$. We show that decay rates l\nu_l\gamma (l=e,\mu)$ $B\to\nu\bar{\nu}\gamma$ are larger than corresponding purely leptonic modes. Explicitly, standard model, find branching ratios \mu\nu_{\mu}\gamma$ $B_s\to\nu\bar{\nu}\gamma$ $3.7\times 10^{-6}$...
We study the lepton flavor violation (LFV) in tau decays framework of supersymmetric seesaw mechanism with nonholomorphic terms for sector at a large $\mathrm{tan}\ensuremath{\beta}$. In particular, we analyze two new decay modes $\ensuremath{\tau}\ensuremath{\rightarrow}\ensuremath{\ell}{f}_{0}(980)$ and $\ensuremath{\tau}\ensuremath{\rightarrow}\ensuremath{\ell}{K}^{+}{K}^{\ensuremath{-}}$ arising from scalar boson exchanges contrast to...
We study the charmful three-body baryonic $B$ decays with ${D}^{(*)}$ or $J/\ensuremath{\Psi}$ in final state. explain measured rates of ${\overline{B}}^{0}\ensuremath{\rightarrow}n\overline{p}{D}^{*+}$, ${\overline{B}}^{0}\ensuremath{\rightarrow}p\overline{p}{D}^{(*)0}$, and ${B}^{\ensuremath{-}}\ensuremath{\rightarrow}\ensuremath{\Lambda}\overline{p}J/\ensuremath{\Psi}$ predict branching fractions ${\overline{B}}^{0}\ensuremath{\rightarrow}\ensuremath{\Lambda}\overline{p}{D}^{*+}$,...
We study the fragmentation fractions (fBb) of b-quark to b-baryons (Bb). By assumption fΛb/(fu+fd)=0.25±0.15 in accordance with measurements by LEP, CDF and LHCb Collaborations, we estimate that fΛb=0.175±0.106 fΞb−,0=0.019±0.013. From these fractions, derive B(Λb→J/ψΛ)=(3.3±2.1)×10−4, B(Ξb−→J/ψΞ−)=(5.3±3.9)×10−4 B(Ωb−→J/ψΩ−)>1.9×10−5. The predictions B(Λb→J/ψΛ) B(Ξb−→J/ψΞ−) clearly enable us test theoretical models, such as QCD factorization approach b-baryon decays.
We study the three-body $\Lambda_b$ decays of $\Lambda_b\to J/\psi pM$ with $M=K^-$ and $\pi^-$. The two new states ${\cal P}_{c1}\equiv {\cal P}_c(4380)^+$ P}_{c2}\equiv P}_c(4450)^+$ observed recently as resonances in $J/\psi p$ invariant mass spectrum p K^-$ can be identified to consist five quarks, $uudc\bar c$, being consistent existence pentaquark states. argue that, doubly charmful pK^-$ through $b\to c\bar c s$, apart from those non-resonant resonant \Lambda^*\to transitions, third...
We report new measurements of the branching fraction $\mathcal{B}({D}_{s}^{+}\ensuremath{\rightarrow}{\ensuremath{\ell}}^{+}\ensuremath{\nu})$, where ${\ensuremath{\ell}}^{+}$ is either ${\ensuremath{\mu}}^{+}$ or ${\ensuremath{\tau}}^{+}(\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\overline{\ensuremath{\nu}}}_{\ensuremath{\tau}})$, based on $6.32\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ electron-positron annihilation data collected by BESIII experiment at six center-of-mass energy...
We investigate the rare baryonic exclusive decays of $\Lambda_b\to \Lambda l^+ l^- (l=e,\mu,\tau)$ with polarized $\Lambda $. Under approximation heavy quark effective theory (HQET), in standard model we derive differential decay rates and various polarization asymmetries by including lepton mass effects. find that long-distance effects branching ratios are $5.3\times 10^{-5}$ for l^-\ (l=e,\mu)$ $1.1\times \tau^+\tau^-$. The new physics also discussed. integrated longitudinal $\Lambda$...
We study the lepton angular distributions in $B\to D^{(*)} \ell \nu_{\ell}$ decays. The asymmetries decays with general effective interactions are examined. demonstrate that sensitive to new physics a right-handed quark current.
We study the angular distributions of baryon-antibaryon low-mass enhancements in three-body baryonic $B$ decays $B\ensuremath{\rightarrow}p\overline{p}M$ ($M=K$ and $\ensuremath{\pi}$) framework perturbative QCD. By writing most general forms for transition form factors $B\ensuremath{\rightarrow}p\overline{p}$, we find that distribution asymmetry ${B}^{\ensuremath{-}}\ensuremath{\rightarrow}p\overline{p}{K}^{\ensuremath{-}}$ measured by Belle Collaboration can be explained. give a...