Recently, the LHCb Collaboration reported three ${P}_{c}$ states in $J/\ensuremath{\psi}p$ channel. We systematically study mass spectrum of hidden charm pentaquark framework an extended chromomagnetic model. For $nnnc\overline{c}$ with $I=1/2$, we find that (i) lowest state is ${P}_{c}(4327.0,1/2,1/{2}^{\ensuremath{-}})$ [We use ${P}_{c}(m,I,{J}^{P})$ to denote pentaquark], which corresponds ${P}_{c}(4312)$. Its dominant decay mode ${\mathrm{\ensuremath{\Lambda}}}_{c}{\overline{D}}^{*}$....

In this work, we systematically study the mass spectrum of fully heavy tetraquark in an extended chromomagnetic model, which includes both color and interactions. Numerical results indicate that energy level is mainly determined by interaction, favors color-sextet $\ket{(QQ)^{6_{c}}(\bar{Q}\bar{Q})^{\bar{6}_{c}}}$ configuration over color-triplet $\ket{(QQ)^{\bar{3}_{c}}(\bar{Q}\bar{Q})^{3_{c}}}$ one. The interaction mixes two configurations gives small splitting. ground state always...

There has been important experimental progress in the sector of heavy baryons past several years. We study strong decays $S$-wave, $P$-wave, $D$-wave, and radially excited charmed using $^{3}P_{0}$ model. After comparing calculated decay pattern total width with available data, we discuss possible internal structure quantum numbers those observed recently.

Since ${Z}^{+}(4430)$ lies very close to the threshold of ${D}^{*}{\overline{D}}_{1}$, we investigate whether could be a loosely bound S-wave state ${D}^{*}{\overline{D}}_{1}$ or ${D}^{*}{\overline{D}}_{1}^{\ensuremath{'}}$ with ${J}^{P}={0}^{\ensuremath{-}},{1}^{\ensuremath{-}},{2}^{\ensuremath{-}}$, i.e., molecular arising from one-pion-exchange potential. The potential crossed diagram is much larger than that diagonal scattering diagram. With various trial wave functions, notice...

Using an extended chromomagnetic model, we perform a systematic study of the masses doubly heavy tetraquarks. We find that ground states tetraquarks are dominated by color-triplet $\ket{(qq)^{\bar{3}_{c}}(\bar{Q}\bar{Q})^{3_{c}}}$ configuration, which is opposite to fully The combined results suggest configuration becomes more important when mass difference between quarks and antiquarks increases. three stable lie below thresholds two pseudoscalar mesons. They $IJ^{P}=01^{+}$...

We reexamine whether ${Z}^{+}(4430)$ could be a ${D}_{1}^{\ensuremath{'}}\ensuremath{-}{D}^{*}$ or ${D}_{1}\ensuremath{-}{D}^{*}$ molecular state after considering both the pion and $\ensuremath{\sigma}$ meson exchange potentials introducing form factor to take into account structure effect of interaction vertex. Our numerical analysis with Matlab package MATSLISE indicates contribution from sigma is small for system significant system. The S-wave ${D}_{1}\ensuremath{-}{\overline{D}}^{*}$...

We extend the chromomagnetic model by further considering effect of color interaction. The effective mass parameters between quark pairs (${m}_{qq}$ or ${m}_{q\overline{q}}$) are introduced to account for both masses and interaction two quarks. Using experimental hadrons, pair determined light light-heavy pairs. Then heavy ($cc$, $cb$, $bb$) estimated based on simple assumption. calculate all doubly triply heavy-quark baryons. newly discovered charmed baryon...

We estimate pionic decay widths of the narrow charm-strange resonances ${D}_{sj}(2317)$ and ${D}_{sj}(2460)$ using $^{3}P_{0}$ model. Their one-pion decays occur through $\ensuremath{\eta}\ensuremath{-}{\ensuremath{\pi}}^{0}$ mixing while two-pion virtual ${f}_{0}(980)$ meson. The between $^{1}P_{1}$ states enhances single-pion width suppresses its double-pion significantly. As a byproduct, we also calculate ${B}_{sj}(5765)$, ${B}_{sj}(5765)$ mesons in $({0}^{+},{1}^{+})$ heavy doublet.

Experimentally several charged axial-vector hidden-charm states were reported. Within the framework of color-magnetic interaction, we have systematically considered mass spectrum and hidden-bottom tetraquark states. It is impossible to accommodate all three ${Z}_{c}(3900)$, ${Z}_{c}(4025)$, ${Z}_{c}(4200)$ within simultaneously. Not these are candidates. Moreover, eigenvector chromomagnetic interaction contains valuable information decay pattern The dominant mode lowest state...

In the framework of an extended chromomagnetic model, we systematically study mass spectrum $S$-wave $qQ\overline{Q}\overline{Q}$ tetraquarks. Their spectra are mainly determined by color interaction. For $qc\overline{c}\overline{c}$, $qb\overline{c}\overline{c}$, and $qb\overline{b}\overline{b}$ tetraquarks, interaction favors color-sextet $|(qQ{)}^{{6}_{c}}(\overline{Q}\overline{Q}{)}^{{\overline{6}}_{c}}⟩$ configuration over color-triplet...

We calculate the magnetic moments of pentaquark states from different models and compare our results with predictions other groups.Received 9 December 2003DOI:https://doi.org/10.1103/PhysRevC.69.035205©2004 American Physical Society

$S$- and $P$-wave $D\overline{D}$ scatterings are studied in a meson exchange model with the coupling constants obtained heavy quark effective theory. With extracted phase shifts separable potential approximation, we include rescattering effect investigate production process ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}D\overline{D}$. We find that it is difficult to explain anomalous line shape observed by BES Collaboration this mechanism. Combining our calculation experimental...

Employing the relativized quark model and quark-interchange model, we investigate decay of charged heavy quarkonium-like states $Z_c(3900)$, $Z_c(4020)$, $Z_c(4430)$, $Z_b(10610)$ $Z_b(10650)$ into ground radially excited quarkonia via emitting a pion meson. The $Z_c$ $Z_b$ are assumed to be hadronic molecules composed open-flavor mesons. calculated ratios can compared with experimental data, which useful in judging whether molecule state assignment for corresponding or is reasonable not....

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In this work, we adopt the spin rearrangement scheme in heavy quark limit and extensively investigate three classes of radiative decays: $\mathfrak{M}\ensuremath{\rightarrow}(b\overline{b})+\ensuremath{\gamma}$, $(b\overline{b})\ensuremath{\rightarrow}\mathfrak{M}+\ensuremath{\gamma}$, $\mathfrak{M}\ensuremath{\rightarrow}{\mathfrak{M}}^{\ensuremath{'}}+\ensuremath{\gamma}$ corresponding to electromagnetic transitions between one molecular (resonant) state bottomonium, bottomonium state, two...

We have calculated the magnetic moment of recently observed $\Theta^+$ pentaquark in framework light cone QCD sum rules using photon distribution amplitudes. find that $\mu_{\Theta^+}=(0.12\pm 0.06) \mu_N$, which is quite small. also compare our result with predictions other groups.

The chiral quark model gives a reasonably good description of many low-energy observables by incorporating the effective degrees carried constituent quarks and Goldstone bosons. We calculate decuplet to octet transition magnetic moments decay widths several excited hyperons using this model. various radiative from roughly agree with experimental data including recent JLAB measurement.

We have systematically investigated the magnetic moments and form factors of decuplet baryons to next-to-next-to-leading order in framework heavy baryon chiral perturbation theory. Our calculation includes contributions from both intermediate octet states loops. also calculated charge dipole baryons. results may be useful for extrapolation lattice simulations electromagnetic properties.

We propose an extended Nambu—Jona-Lasinio model to include heavy mesons with quark symmetry. The current—current interaction is generalized the currents. In order comply spin symmetry at limit, dependence of mass on strength introduced. light and pseudo-scalar vector mesons, their masses weak decay constants are calculated in unified frame.

Following the work of Capstick and Isgur [], we systematically study mass spectrum heavy baryons in relativized quark potential model with chromodynamics. Besides original Godfrey-Isgur (GI) model, also adopt a modified GI which replaces linear confinement by screened one. The two models give similar results our work. All observed so far can be explained as three-quark states. In particular, identify <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"...

We construct the spin-flavor wave functions of possible heavy pentaquarks containing an anti-charm or anti-bottom quark using various clustered models. Then we estimate masses and magnetic moments $J^P={1\over 2}^+$ ${3\over pentaquarks. emphasize difference in predictions these Future experimental searches at BESIII, CLEOc, BELLE, LEP may find interesting states.

Using the color-magnetic interaction Hamiltonian with SU(3) flavor symmetry breaking, we perform a schematic study of masses $J^P=1^+$ tetraquarks in anti-decuplet representation. After diagonalizing mass matrix, find $ud\bar s\bar s$ tetraquark lies around 1347 MeV. It decays into $K^+K^0π^0, K^+K^+π^-, K^0K^0π^+$ via P-wave. The dual suppression from not-so-big three-body phase space and P-wave decay barrier may render this exotic state rather narrow. Future experimental exclusion will...