A5035734785- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Black Holes and Theoretical Physics
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Nuclear physics research studies
- Computational Physics and Python Applications
- Atomic and Subatomic Physics Research
- Particle Accelerators and Free-Electron Lasers
- Astrophysics and Cosmic Phenomena
- Medical Imaging Techniques and Applications
- Particle Detector Development and Performance
- Cold Atom Physics and Bose-Einstein Condensates
- Astronomy and Astrophysical Research
- Radiation Therapy and Dosimetry
- Advanced Radiotherapy Techniques
- Advanced NMR Techniques and Applications
- Superconducting Materials and Applications
- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- Cosmology and Gravitation Theories
- Cardiac Valve Diseases and Treatments
- Aerosol Filtration and Electrostatic Precipitation
- Cyclone Separators and Fluid Dynamics
Institute of High Energy Physics
2016-2025
Chinese Academy of Sciences
2016-2025
Zhengzhou University
2016-2025
Nankai University
1993-2025
Xinjiang Institute of Ecology and Geography
2025
Lanzhou Veterinary Research Institute
2025
Chinese Academy of Agricultural Sciences
2025
Lanzhou University
2025
Jiangsu University of Science and Technology
2025
Yangtze River Pharmaceutical Group (China)
2025
Hadrons are composite particles made of quark and gluons. Interestingly, some excited hadronic states resemble the deuteron viewed as a barely bound neutron-proton system. Such molecules spatially extended systems lying very close to decay thresholds. This work reviews current experimental evidence for related theoretical descriptions, including effective field theories lattice quantum chromodynamics.
Abstract Lepton scattering is an established ideal tool for studying inner structure of small particles such as nucleons well nuclei. As a future high energy nuclear physics project, Electron-ion collider in China (EicC) has been proposed. It will be constructed based on upgraded heavy-ion accelerator, High Intensity Accelerator Facility (HIAF) which currently under construction, together with new electron ring. The proposed provide highly polarized electrons (with polarization ∼80%) and...
The observation of $Z_c(3900)$ by the BESIII collaboration in invariant mass spectrum $J/\psi\pi^\pm$ $e^+e^-\to J/\psi\pi^+\pi^-$ at center 4.260 GeV suggests existence a charged $\bar D D^*+D\bar D^*$ molecular state with $I(J^P)=1(1^+)$, which could be an isovector brother famous X(3872) and analogue $Z_b(10610)$ claimed Belle Collaboration. We demonstrate that this provides strong evidence mysterious Y(4260) is $\bar{D}D_1(2420) +D\bar{D}_1(2420)$ state. Especially, we show decay...
We find that several thresholds can contribute to the enhancements of newly observed heavy pentaquark candidates $P_c^+(4380)$ and $P_c^+(4450)$ via anomalous triangle singularity (ATS) transitions in specific kinematics $\Lambda_b\to J/\psi K^- p$. Apart from two peaks we another around 4.5 GeV also be produced by ATS. show $\Sigma_c^{(*)}$ at leading order $\Lambda_b$ decay. This process is different diagram its threshold enhancement only appears as CUSP effects if there no pole structure...
The mass table in the deformed relativistic Hartree-Bogoliubov theory continuum (DRHBc) with PC-PK1 density functional has been established for even-$Z$ nuclei $8\le Z\le120$, extended from previous work even-even [Zhang $\it{et.~al.}$ (DRHBc Mass Table Collaboration), At. Data Nucl. Tables 144, 101488 (2022)]. calculated binding energies, two-nucleon and one-neutron separation root-mean-square (rms) radii of neutron, proton, matter, charge distributions, quadrupole deformations, neutron...
The BES-III Collaboration recently reported the observation of anomalously large isospin violations in J/ψ→γη(1405/1475)→γπ(0)f(0)(980)→γ+3π, where f(0)(980) ππ invariant mass spectrum appears to be much narrower (~10 MeV) than peak width (~50 measured other processes. We show that a mechanism, named as triangle singularity (TS), can produce narrow enhancement between charged and neutral KK¯ thresholds, i.e., 2m(K(±))~2m(K(0)). It also lead different spectra for η(1405/1475)→a(0)(980)π KK...
We propose to study the pentaquark candidates of ${P}_{c}^{+}(4380)$ and ${P}_{c}^{+}(4450)$ in $J/\ensuremath{\psi}$ photoproduction look for further experimental evidence their nature. Since process does not satisfy so-called ``anomalous triangle singularity'' condition presence would conclude that they should be genuine states provide existence.
The effects of intermediate charmed mesons on charmonium transitions with the emission one pion or eta are studied systematically. Based a nonrelativistic effective field theory we show that meson loops enhanced compared to corresponding tree-level contributions for between two $S$-wave charmonia as well $P$-wave charmonia. On contrary, and state, need be analyzed case by often appear suppressed. relation possible implications an Lagrangian approach also discussed. This study at same time...
We demonstrate that the spectacular structures discovered recently in various experiments and named as $X$, $Y$ $Z$ states cannot be purely kinematic effects. Their existence necessarily calls for nearby poles $S$ matrix they therefore qualify states. propose a way of distinguishing cusp effects from genuine $S$-matrix poles: threshold produce narrow peak invariant mass distribution elastic channel contrast with pole.
We investigate the anomalous triangle singularity (ATS) and its possible manifestations in various processes. show that ATS should have important impact on our understanding of nature some newly observed threshold states. Discussions how to distinguish phenomena from genuine dynamic pole structures are presented.
The strong and radiative decays of the low-lying $S$- $P$-wave $\Lambda_{c(b)}$, $\Sigma_{c(b)}$, $\Xi_{c(b)}$, $\Xi_{c(b)}'$ $\Omega_{c(b)}$ baryons are systematically studied in a constituent quark model. We find that decay mode $\Lambda_b^0\gamma$ could be very useful for us to establish missing neutral states $\Sigma_b^{0}$ $\Sigma_b^{*0}$. Our calculation shows most those $\lambda$-mode singly heavy have relatively narrow width less than 30 MeV. Their dominant channels can ideal...
The strong and radiative decay properties of the low-lying $\Omega_c$ states are studied in a constituent quark model. We find that newly observed by LHCb Collaboration can fit well patterns. Thus, their spin-parity be possibly assigned as following: (i) $\Omega_c(3000)$ has $J^P=1/2^-$ corresponds to narrow $1P$ mixed state $|1^2P_{\lambda}\frac{1}{2}^-\rangle_1$, its partner $|1^2P_{\lambda}\frac{1}{2}^-\rangle_2$ should broad with width $\sim 100$ MeV. (ii) $\Omega_c(3050)$...
Stimulated by the exciting progress on observations of fully charmed tetraquarks at LHC, we carry out a combined analysis mass spectra and fall-apart decays <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mn>1</a:mn><a:mi>S</a:mi></a:mrow></a:math>-, <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mn>2</c:mn><c:mi>S</c:mi></c:math>-, <e:math xmlns:e="http://www.w3.org/1998/Math/MathML"...
A coherent study of the production $f_0^i$ ($i=1$, 2, 3 corresponding to $f_0(1710)$, $f_0(1500)$, and $f_0(1370)$) in $J/ψ\to V f_0 \to PP$ is reported based on a previously proposed glueball $Q\bar{Q}$ nonet mixing scheme, factorization for decay f_0^i$, where $V$ denotes isoscalar vector mesons $ϕ$ $ω$, $P$ pseudoscalar mesons. The results show that $J/ψ$ decays are very sensitive structure those scalar mesons, suggest $1.5-1.7$ GeV region, line with Lattice QCD. presence significant...
Charmed baryon strong decays are studied in a chiral quark model. The data for the of ${\ensuremath{\Lambda}}_{c}^{+}(2593)$, ${\ensuremath{\Lambda}}_{c}^{+}(2625)$, ${\ensuremath{\Sigma}}_{c}^{++,+,0}$, and ${\ensuremath{\Sigma}}_{c}^{+,0}(2520)$ accounted successfully, which allows one to fix pseudoscalar-meson-quark couplings an effective Lagrangian. Extending this framework analyze newly observed charmed baryons, we classify that ${\ensuremath{\Lambda}}_{c}(2880)$...
We carry out a systematic study of the heavy-light meson strong decays in chiral quark model. For $S$-wave vectors [${D}^{*}(2007)$, ${D}^{*\ifmmode\pm\else\textpm\fi{}}(2010)$], $P$-wave scalars [${D}_{0}^{*}(2400)$, ${B}_{0}^{*}(5730)$], and tensors [${D}_{2}^{*}(2460)$, ${D}_{s2}^{*}(2573)$], we obtain results good agreement with experimental data. axial ${D}_{1}(2420)$ ${D}_{1}^{\ensuremath{'}}(2430)$, state mixing scheme between $1^{1}P_{1}$ $1^{3}P_{1}$ is favored angle...
The decays of the $Z_b(10610)$ and $Z_b(10650)$ to $\Upsilon(nS)\pi$, $h_b(mP)\pi$ $\chi_{bJ}(mP)\gamma$ ($n=1,2,3$, $m=1,2$ $J=0,1,2$) are investigated within a nonrelativistic effective field theory. It is argued that, while $\Upsilon(nS) \pi$ suffer from potentially large higher order corrections, $P$-wave transitions $Z_b$ states offer best possibility confirm nature as molecular further study their properties. We give nontrivial parameter-free predictions for ratios various partial...
Since its first observation in 2005, the vector charmonium $Y(4260)$ has turned out to be one of prime candidates for an exotic state spectrum. It was recently proposed that should have a prominent $D_1\bar{D}+c.c.$ molecular component is strongly correlated with production charged $Z_c(3900)$. In this paper we demonstrate nontrivial cross section line shapes $e^+e^-\to J/\psi\pi\pi$ and $h_c\pi\pi$ can naturally explained by scenario. As consequence find significantly smaller mass than...
In this work we make a systematic analysis of the correlated processes $J/\psi\to \gamma \eta(1440)/f_1(1420)$ with $\eta(1440)/f_1(1420)\to K\bar{K}\pi$, $\eta\pi\pi$ and $3\pi$, where role played by so-called "triangle singularity mechanism" (TSM) is clarified. Our results agree well experimental data suggest small fraction $f_1(1420)$ contributions in these processes. This study confirms our conclusion [Phys. Rev. Lett. 108, 081803 (2012)] that dynamic feature TSM can be recognized strong...
In order to test different models proposed for some states discovered recently in the charmonium mass range that do not fit into pattern predicted by conventional quark model, we derive predictions spectrum within hadro-charmonium picture, tetraquark picture as well hadronic molecular approach. We exploit heavy spin symmetry and molecule scenarios. The patterns emerge from turn out be quite distinct. For example, only a pseudoscalar state emerges is lighter than Y(4260). Possible discovery...