S. M. Gerasyuta, E. E. Matskevich
The relativistic six-quark equations are found in the framework of the dispersion relation technique. The strange baryonia are constructed without the mixing of the quarks and antiquarks. The relativistic six-quark amplitudes of the strange baryonia with the open and hidden strange are calculated. The poles of these amplitudes determine the masses of strange baryonia. 17 masses of baryonia are predicted.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
继续探索
Non-strange and strange pentaquaks with hidden charm are considered as diquark-diquark-antiquark composite systems. Spin and isospin content of such exotic states is discussed and masses are evaluated.
Decay properties of hidden-strangeness partners of X(3872) are studied in tetra-quark pictures. As the results, it is seen that their decay properties are strongly model dependent, and therefore, experimental studies of them will select a realistic model.
Recently BESIII collaboration discovered a charged strange hidden-charm state $Z_{cs}$(3985) in the $D_s^-D^{*0} + D_s^{*-}D^{0}$ spectrum. A higher $Z'_{cs}$ state coupling to $\bar{D}_s^{*-}D^{*0}$ is expected by SU(3)-flavor symmetry, and their bottom partners are anticipated by heavy quark flavor symmetry. Here we study the photoproduction of these exotic states and investigate carefully the background from Pomeron exchange. Our results indicate that the maximal photoproduction cross section of strange partner is around 1 $\sim$ 2 orders of magnitude smaller than that of the corresponding …
Strange pentaquarks with a hidden heavy quark-antiquark pair
研究利用耦合道夸克集团模型考察含隐藏粲或底夸克对的奇异五夸克，揭示色八重态吸引可产生束缚态、共振与散射尖点。
This paper calculates the magnetic moments of the hidden-charm strange pentaquark states with a quantum number of $J^P={\frac{1}{2}}^{\pm}$, ${\frac{3}{2}}^{\pm}$, ${\frac{5}{2}}^{\pm}$, and ${\frac{7}{2}}^{+}$ in the molecular, diquark-diquark-antiquark, and diquark-triquark models, respectively. Numerical results demonstrate that the magnetic moments change for a different spin-orbit coupling with the same model and when involving different models with the same angular momentum.
Analysis of the vector hidden-charm-hidden-strange tetraquark states with implicit P-waves
本文以各类双夸克为基本单元构造含隐P波的四夸克流，利用QCD求和规则系统研究隐粲-隐奇异四夸克态，并重新考察多个X/Y态的归属。
Diabatic Dynamical Diquark Model of Hidden-Strangeness Tetraquarks
该研究通过非绝热动力学双夸克模型分析隐藏strange四夸克子，发现其结构受双Hadron阈值影响较小，多个高能态仍为优质候选者。
The role of nonvalence, e.g., sea quarks and/or meson degrees of freedom in static electroweak baryon observables is briefly discussed.
The masses of cryptoexotic pentaquarks with hidden beauty are estimated phenomenologically using the results by the LHCb collaboration which discovered recently the cryptoexotic pentaquarks with hidden charm. The expected masses of the hidden beauty pentaquarks are about $10.8$ GeV and $10.7$ GeV in the limit of some kind of heavy quark symmetry. The states with hidden strangeness considered in similar way have masses about $2.37$ Gev and $2.30$ GeV, by several hundreds of MeV higher than states discussed previously in connection with the relatively light positive strangeness pentaquark $θ^+$.…
In this work, we investigate the interactions between the charmed-strange meson ($D_s, D_s^{*}$) in $H$-doublet and the (anti-)charmed-strange meson ($D_{s1}, D_{s2}^{*}$) in $T$-doublet, where the one boson exchange model is adopted by considering the $S$-$D$ wave mixing and the coupled-channel effects. By extracting the effective potentials for the discussed $H_s\bar{T}_s$ and $H_s{T}_s$ systems, we try to find the bound state solutions for the corresponding systems. We predict the possible hidden-charm hadronic molecular states with hidden strangeness, i.e., the $D_s^{*}\bar D_{s1}+c.c.$ st…
In our former work [arXiv:2011.07214], the $P_{cs}(4459)$ observed by the LHCb Collaboration can be explained as a coupled strange hidden-charm $Ξ_c\bar{D}^*/Ξ_c^*\bar{D}/Ξ_c'\bar{D}^*/Ξ_c^*\bar{D}^*$ molecule with $I(J^P)=0(3/2^-)$. Here, we further discuss the two-body strong decay behaviors of the $P_{cs}(4459)$ in the meson-baryon molecular scenario by input the former obtained bound solutions. Our results support the $P_{cs}(4459)$ as the strange hidden-charm $Ξ_c\bar{D}^*$ molecule with $I(J^P)=0(3/2^-)$. The relative decay ratio between $Λ_cD_s^*$ and $J/ψΛ$ is around 10, where the part…
The observation by BESIII and LHCb of states with hidden charm and open strangeness ($c\bar c q\bar s$) presents new opportunities for the development of a global model of heavy-quark exotics. Here we extend the dynamical diquark model to encompass such states, using the same values of Hamiltonian parameters previously obtained from the nonstrange and hidden-strange sectors. The large mass splitting between $Z_{cs}(4000)$ and $Z_{cs}(4220)$ suggests substantial SU(3)$_{\rm flavor}$ mixing between all $J^P \! = \! 1^+$ states, while their average mass compared to that of other sectors offers a …
In this article, we investigate the mass spectrum of the ground state hidden-charm tetraquark molecular states without strange, with strange and with hidden-strange via the QCD sum rules in a comprehensive way and revisit the assignments of the $X$, $Y$, $Z$ states in the scenario of tetraquark molecular states consistently based on the QCD sum rules.
Analysis of the hidden-charm-hidden-strange tetraquark mass spectrum via the QCD sum rules
本文构造双夸克-反双夸克四夸克流，用传统QCD求和规则并计入轻味SU(3)破缺，系统计算隐粲隐奇异四夸克质量谱，重新辨认多个X态及LHCb新态。
In the present work, we investigate the productions of the molecular states composed of $D^{(*)}_s \bar{D}^{(*)}$ and $D^{(*)}_s \bar{D}^{(*)}_s$ in the $B$ and $B_s$ decays by using an effective Lagrangian approach. The branching ratios in terms of the model parameter $α$ and the binding energy $ΔE$ are estimated. Our estimations indicate that the branching fractions are of the order of $10^{-4}$ and the relative ratios are very weakly dependent on the model parameter $α$ and the binding energy $ΔE$. The predicted ratios are helpful for searching the hidden-charm molecular states with strange…
The phenomenological sum-rule-based approach is used to discuss the quark composition dependence of some static electroweak characteristics of baryons.The role of nonvalence degrees of freedom (the sea partons and/or peripheral meson currents) is shown to be important to select and make use of the relevant symmetry parametrization of baryon observables.The implications of the baryon magnetic moment analysis for estimation of the $Δ$q values of the spin-dependent DIS on nucleons, the contribution of hidden strangeness to the nucleon magnetic moment and to the quark-line-rule violating $ϕπ$ - pr…
The hidden charm pentaquark state $P_c(4450)$ observed recently by the LHCb collaboration may be of molecular nature, as advocated by some unitary approaches that also predict pentaquark partners in the strangeness $S=-1$ sector. In this work we argue that a hidden-charm strange pentaquark could be seen from the decay of the $Λ_b$, just as in the case of the non-strange $P_c(4450)$, but looking into the $J/ψηΛ$ decay mode and forming the invariant mass spectrum of $J/ψΛ$ pairs. In the model presented here, which assumes a standard weak decay topology and incorporates the hadronization process …
Stimulated by the meson-baryon molecular interpretations of the $P_c$ states ($P_c(4312)/P_c(4440)/P_c(4457)$), we systematically study the interactions between an $S-$wave charm-strange baryon $Ξ_c^{(\prime,*)}$ and an anti-charmed meson $\bar{D}^{(*)}$ in a coupled channel analysis. Effective potentials for the $Ξ_c^{(\prime,*)}\bar{D}^{(*)}$ interactions in a one-boson-exchange model can be related to those in the $Σ_c^{(*)}\bar{D}^{(*)}$ systems by using the $SU(3)$ flavor symmetry and heavy quark symmetry. Our results can predict several promising hidden-charm molecular pentaquarks with s…
Current-dependent SU(3)-flavor breaking in hidden-heavy $0^{--}$ tetraquark spectroscopy
利用QCD求和规则研究隐粲奇异$0^{--}$四夸克态，通过分析奇异夸克质量和凝聚项在算符乘积展开中的贡献，发现SU(3)味对称性破缺对不同色八重态流结构产生非均匀的质量移动，从而可作为区分内部流结构的探针。
Inspired by the newly $Z_{cs}(3985)^-$ reported by the BESIII Collaboration in the $K^+$ recoil-mass spectrum of the of $e^+e^-\to (D^{*0}D_s^-/D^0D_s^{*-})K^+$ processes, we perform a dynamical study on the $D^{(*)0}D_s^{*-}$ interactions by adopting a one-boson-exchange model and considering the coupled channel effect. After producing the phase shifts for all the discussed channels, our results exclude the newly $Z_{cs}(3985)^-$ as a $D^{*0}D_s^{-}/D^{0}D_s^{*-}/D^{*0}D_s^{*-}$ resonance with $I(J^P)=1/2(1^+, 0^-, 1^-, 2^-)$.
The hidden strange $B_{c}$-like molecular states
本文利用手征幺正方法研究 $b\ar{c}s\ar{s}$ 系统中隐藏奇异类 $B_{c}$ 分子态，预言了六个阈值以下态及其结合能和宽度，为未来实验寻找类 $B_{c}$ 态提供理论补充。
Stimulated by the $P_{cs}(4459)$ reported by the LHCb Collaboration, we perform a single $Ξ_c\bar{D}^*$ channel and a coupled $Ξ_c\bar{D}^*/Ξ_c^*\bar{D}/Ξ_c^{\prime}\bar{D}^*/Ξ_c^*\bar{D}^*$ channel analysis by using a one-boson-exchange model. Our results indicate that the newly $P_{cs}(4459)$ cannot be a pure $Ξ_c\bar{D}^*$ molecular state, but a coupled $Ξ_c\bar{D}^*/Ξ_c^*\bar{D}/Ξ_c^{\prime}\bar{D}^*/Ξ_c^*\bar{D}^*$ bound state with $I(J^P)=0(3/2^-)$, where the $Ξ_c\bar{D}^*$ and $Ξ_c^*\bar{D}$ components are dominant. Meanwhile, we find the interactions from the $Ξ_c^{\prime}\bar{D}^*$ sy…
In the framework of the chiral quark model, we investigate the hidden strange pentaquark system of the $Nϕ$ state with the quantum numbers of IJ=$\frac{1}{2}$$\frac{3}{2}$. The results show that the $Nϕ$ state can be bound through the interaction of the $σ$ meson exchange plus the effect of the channel coupling, which means that the effect of the channel coupling has an influence on the existence of this bound state.
Exploring pion emission properties of (strange) hidden-charm molecular pentaquarks in a chiral quark model
针对$P_c$、$P_{cs}$五夸克态内部结构未知的问题，在手征夸克模型下考虑耦合道效应验证π介子发射可作为结构探测灵敏探针，为相关实验研究提供理论指引。
Molecular pentaquarks with hidden charm and double strangeness
本文从理论上分析了介子-重子耦合道相互作用，利用局域隐规范对称性扩展方法计算s波散射矩阵，发现双奇异区存在四个五夸克极点，但三奇异道无法产生束缚态或共振态。
In this work, we take all the color-antitriplet diquarks, such as the scalar, pseudoscalar, vector, axialvector and tensor diquarks, as the basic constituents to construct the local pseudoscalar four-quark currents without importing the explicit P-waves to implement the negative-parity, and investigate the mass spectroscopy of the pseudoscalar hidden-charm tetraquark states without strange, with strange and with hidden-strange in the framework of the QCD sum rules in a consistent and comprehensive way. We obtain the lowest mass $4.56\pm0.08\,\rm{GeV}$ for the pseudoscalar tetraquark state with…
Unveiling the Structure of Hidden-Bottom Strange Pentaquarks via Magnetic Moments
受隐粲奇异五夸克发现启发，该研究在分子图像下系统计算奇异数1和2的隐底奇异五夸克磁矩，为确定这类新假设强子态的内部结构提供参考。
We have studied the meson-baryon $S-$wave interaction, using coupled channels, in the isoscalar hidden-charm strange sector and $J^P = 1/2^-,3/2^-$ and $5/2^-$. We impose constraints of heavy quark spin symmetry in the interaction and obtain the non vanishing matrix elements from an extension of the local hidden gauge approach to the charm sector. The ultraviolet divergences are renormalized using the same meson-baryon-loops regulator previously employed in the non-strange hidden charm sector, where a good reproduction of the properties of the newly discovered pentaquark states is obtained. We…
This work uses the QCD Sum Rules to study the masses of the $D_s \bar{D}_s^*$ and $D_s^* \bar{D}_s^*$ molecular states with quantum numbers $J^{PC} = 1^{+-}$. Interpolating currents with definite C-parity are employed, and the contributions up to dimension eight in the Operator Product Expansion (OPE) are taken into account. The results indicate that two hidden strange charmonium-like states may exist in the energy ranges of $3.83 \sim 4.13 $ GeV and $4.22 \sim 4.54 $ GeV, respectively. The hidden strange charmonium-like states predicted in this work may be accessible in future experiments, e.…
The pentaquark states, $P_{c}(4312)$, $P_{c}(4440)$ and $P_{c}(4457)$, could be nicely arranged into a multiplet of seven molecules of $\bar{D}^{(\ast)}Σ_{c}^{(\ast)}$ dictated by heavy quark spin symmetry. However, the spins of $P_c(4440)$ and $P_c(4457)$ are not yet fully determined. In this work we employ the contact-range effective field theory to investigate the $SU(3)$-flavor counterparts of $\bar{D}^{(\ast)}Σ_{c}^{(\ast)}$, and study the possibility whether their discovery can help determine the spins of $P_c(4457)$ and $P_c(4440)$. We find the existence of a complete hidden charm stran…
We study possible contributions to the Ds^+ -> omega pi^+ and Ds^+ -> rho^0 pi^+ decay amplitudes. The Ds^+ -> omega pi^+ decay amplitude vanishes when the naive factorization is used, while the Ds^+ -> rho^0 pi^+ decay amplitude arises due to the annihilation contribution. We find that amplitudes for both decays might be a result of the internal K, K^* exchange. The Ds^+ -> omega pi^+ amplitude might obtain additional contribution from Ds^+ -> rho^0 eta (eta') re-scattering. The low experimental bound on the Ds^+ -> rho^0 pi^+ rate can be understood as a result of combination of the pi(1300) …
$P_{c\bar cs}(4459)^{0}$, $P_{c\bar c s}(4338)^0$ and mass spectrum of strange hidden-charm pentaquarks
本文基于双夸克-三夸克模型，利用高斯展开法计算了奇异隐藏魅子五夸克态的质量，发现S波和P波激发态的质量范围分别为4200-4590 MeV和大于4600 MeV，并预测了最低的奇异隐藏魅子五夸克态质量。
Motivated by the analogous properties of the $Z_c(3900/3885)$ and $Z_{cs}(3985/4000)$, we tentatively assign the $Z_c(4020/4025)$ as the $A\bar{A}$-type hidden-charm tetraquark state with the $J^{PC}=1^{+-}$, where the $A$ denotes the axialvector diquark states, and explore the $A\bar{A}$-type tetraquark states without strange, with strange and with hidden-strange via the QCD sum rules in a consistent way. Then we explore the hadronic coupling constants in the two-body strong decays of the tetraquark states without strange and with strange via the QCD sum rules based on rigorous quark-hadron d…
We investigate the production of the hidden-charm pentaquark $P_{cs}^0(4459)$ with strangeness in the $K^- p \to J/ψΛ$ reaction, employing two different theoretical frameworks, i.e., the effective Lagrangian method and the Regge approach. Having determined all relevant coupling constants, we are able to compute the total and differential cross sections for the $K^- p \to J/ψΛ$ reaction. We examine the contributions of $P_{cs}$ with different sets of spin-parity quantum number assigned. The present results may give a guide for possible future experiments.
Analogous to the work of hidden charm molecular pentaquarks, we study possible hidden strange molecular pentaquarks composed of $Σ$ (or $Σ^{*}$) and $K$ (or $K^{*}$) in the framework of quark delocalization color screening model. Our results suggest that the $ΣK$, $ΣK^{*}$ and $Σ^{*} K^{*}$ with $IJ^{P}=\frac{1}{2}\frac{1}{2}^{-}$ and $ΣK^{*}$, $Σ^{*} K$ and $Σ^{*} K^{*}$ with $IJ^{P}=\frac{1}{2}\frac{3}{2}^{-}$ are all resonance states by coupling the open channels. The molecular pentaquark $Σ^{*} K$ with quantum numbers $IJ^{P}=\frac{1}{2}\frac{3}{2}^{-}$ can be seen as a strange partner of …
Dynamical study of hidden-strange pentaquarks as analogs of the hidden-charm states
基于QDCSM和RGM模型，研究隐藏奇异五夸克系统，预测三个束缚态和一个共振态，为实验搜索提供理论依据。
Possible molecular states from interactions of charmed strange baryons
本研究基于重夸克手征有效拉格朗日量，通过轻介子交换描述粲奇异重子相互作用，利用准势Bethe-Salpeter方程发现多数相互作用可产生束缚态，表明粲奇异重子间广泛存在强吸引作用，为实验寻找相关分子态提供依据。
Inspired by the LHCb's observations of hidden-charm $P_{c(s)}$ states, we study their hidden-strange analogues $P_s$ states in both $[udu][\bar ss]$ and $[uds][\bar su]$ configurations. We investigate the $P_s$ pentaquark states in $pη^\prime$, $pϕ$, $ΛK$, $ΣK$ and $Σ^\ast K^\ast$ structures with $J^P = \frac{1}{2}^-$ and $Σ^\ast K$ and $ΣK^\ast$ with $J^P = \frac{3}{2}^-$, and calculate their masses in the framework of QCD sum rules. Our numerical results show that the extracted hadron masses for all the $pη^\prime$, $pϕ$, $ΛK$, $ΣK$ and $Σ^\ast K^\ast$ structures are much higher than $ΣK$ ma…
QCD sum rule analysis of hidden strange $1^{++}$ tetraquark masses and radial excitations
本文通过QCD求和规则分析隐藏奇异$1^{++}$四夸克，确定$us\bar{u}\bar{s}$基态质量，发现$a_1(1930)$是致密$1^{++}$四夸克候选者，并讨论其可在未来实验检验的衰变道。
Kaon-induced production of strange hidden-charm molecular pentaquarks $P^Λ_{ψs}$ from proton
本研究基于单玻色子交换模型与Bethe-Salpeter方程，探讨了介子诱导产生奇异隐粲分子态五夸克态的过程，预测了相关分波截面与极点结构，为J-PARC和JLab的未来实验提供了理论基础。
Hidden-Strangeness Tetraquarks in the Dynamical Diquark Model
本文将动力学双夸克模型应用于隐奇异态，探究 $ϕ(2170)$ 等介子的四夸克候选可能性，计算了多重态平均质量与详细能谱，为未来实验辨别该质量区强子本质提供诊断依据。
We study the spectrum of the isoscalar pentaquark $udsc\overline{c}$, of either positive or negative parity, in a constituent quark model with linear confinement and a flavor-spin hyperfine interaction previously extended to SU(4) and used to describe the spectrum of the $uudc\overline{c}$ pentaquarks observed at LHCb in 2019. For positive parity we make a distinction between the case where one unit of angular momentum is located in the subsystem of four quarks and the case where the angular momentum is located in the relative motion between a ground state four-quark subsystem and the antiquar…
Study of hidden-charm, doubly-strange pentaquarks in $Λ_b\to J/ψΞ^- K^+$ and $Ξ_b\to J/ψΞ^- π^+$
本研究在幺正耦合道动力学框架下，理论分析$Λ_b$和$Ξ_b$的特定衰变中观测隐粲双奇五夸克态$P_{css}$的潜力，发现其因宽度约10 MeV过窄暂无法被当前实验分辨，但精度提升后可观测。
We propose the initial single chiral particle emission mechanism, with which the hidden-charm di-kaon decays of higher charmonia and charmonium-like states are studied. Calculating the distributions of differential decay width, we obtain the line shape of the $J/ψK^+$ invariant mass spectrum of $ψ_i\to J/ψK^+K^-$, where $ψ_i=ψ(4415), Y(4660)$, and $ψ(4790)$. Our numerical results show that there exist enhancement structures with both hidden-charm and open-strange decays, which are near the $D\bar{D}_s^*/D^*\bar{D}_s$ and $D^*\bar{D}_s^*/\bar{D}^*{D}_s^*$ thresholds. These charged charmonium-li…
Hidden and double charm-strange tetraquarks and their decays in a potential quark model
本文在非相对论势夸克模型框架下系统研究了隐粲与双粲-奇异四夸克的质量谱、色旋配置及衰变模式，发现其窄重排衰变宽度表明它们可能作为真正的四夸克态存在，并指出两者在色配置上的显著差异。
In the framework of one-pion-exchange (OPE) model, we study the hidden-charm and charm-strange molecular pentaquark systems composed of a heavy baryon $(Σ_c, Σ_c^*)$ and a vector meson $(\bar{K}^*, \bar{D}^*)$, where the S-D mixing effect is considered in our calculation. Our result shows that the $Σ_c\bar{D}^*$ molecular state with $(I=1/2,J^P=3/2^-)$ and the $Σ_c^*\bar{D}^*$ molecular state with $(I=1/2,J^P=5/2^-)$ exist in the mass range of the observed $P_c(4380)$ and $P_c(4450)$, respectively. Moreover, we predict two other hidden-charm molecular pentaquarks with configurations $Σ_c\bar{D…
Production potential of hidden-strange molecular pentaquarks through the $π^-p\rightarrow K^{*}Σ$ process
本研究通过有效拉格朗日方法分析$π^-p\rightarrow K^{*}Σ$反应中隐奇异分子五夸克态$P_{s\bar{s}}$的产生，发现$s$道交换主导总截面，预测了微分截面及2→3过程特性，指出实验数据稀缺并建议后续测量。
Prospects for detecting the hidden-strange pentaquarklike state $N^{*}(2080)$ in the $π^{-} p\rightarrowϕn$ reaction
本文用有效拉格朗日方法研究π⁻p散射产生隐藏奇异五夸克态N*(2080)，通过拟合截面发现前向阈值处有峰，为探测提供线索，并建议在多个实验装置进行更精确测量。
The classical quenched quark models with three constituent quarks provide a good description for the baryon spatial ground states, but fail to reproduce the spectrum of baryon excited states. More and more evidences suggest that unquenched effects with multi-quark dynamics are necessary ingredients to solve the problem. Several new hyperon resonances reported recently could fit in the picture of penta-quark states. Based on this picture, some new hyperon excited states were predicted to exist; meanwhile with extension from strangeness to charm and beauty, super-heavy narrow $N^*$ and $Λ^*$ res…
A dynamical calculation of the strange hidden charm pentaquark systems $Λ_{c\bar{c}}$ is performed in the framework of the quark delocalization color screening model. The effective potentials between two clusters are calculated to investigate the interaction between the baryons and mesons. The dynamic calculations indicate that the strange hidden charm pentaquark system with $IJ^{P}=0\frac{1}{2}^{-}$ and $IJ^{P}=0\frac{3}{2}^{-}$ can form bound states with the help of the channel-coupling. The energies of these two system are 4094.3 MeV and 4207.4 Mev, respectively. These two $Λ_{c\bar{c}}$ st…
Mass-Spectroscopy of hidden charm and hidden strange tetraquarks in diquark-antidiquark approach
该研究在非相对论夸克模型下，利用双夸克-反双夸克方法计算了隐藏粲和隐藏奇异四夸克态的质量，解释了X(4140)、X(4274)、X(4700)等共振态的性质。
Using the one-boson-exchange model, we investigate the $Λ_c\bar{D}_s^*$, $Σ_c\bar{D}_s^*$, $Σ_c^*\bar{D}_s^*$, $Ξ_c\bar{D}^*$, $Ξ_c'\bar{D}^*$, and $Ξ_c^*\bar{D}^*$ interactions by considering the one-eta-exchange and/or one-pion-exchange contributions. We further predict the existence of hidden-charm molecular pentaquarks. Promising candidates for hidden-charm molecular pentaquarks include a $Ξ_c'\bar{D}^*$ state with $0(\frac{1}{2}^-)$ and the $Ξ_c^*\bar{D}^*$ states with $0(\frac{1}{2}^-)$ and $0(\frac{3}{2}^-)$. Experimental searches for these predicted hidden-charm molecular pentaquarks a…
Open and hidden strangeness with kaons and $φ$-mesons in Bjorken energy density approach for central A+A collisions from SPS to LHC
利用SPS到LHC能量下中心A+A碰撞的实验数据，通过比较K介子和φ介子对Bjorken能量密度的贡献，研究开放与隐藏奇异度的产生机制及其对QGP性质的敏感度。
Doubly-strange hidden-charm pentaquarks from the Fermi statistics of the light-quark cloud
将重子-粲偶素图像扩展到双奇异扇区，通过色磁标度和奇异质量增量预测了与K介子和反质子关联的五夸克态，其中两个与K介子关联的态形成近简并双重态。
In this work, we study the hidden-strange molecular states composed of a baryon and a vector meson in a coupled-channel $Nρ-Nω-Nϕ-ΛK^*-ΣK^*$ interaction. With the help of the effective Lagrangians which coupling constants are determined by the SU(3) symmetry, the interaction is constructed and inserted into the quasipotential Bethe-Salpeter equation to search for poles in the complex plane, which correspond to molecular states. Two poles are found with a spin parity $3/2^-$ near the $Nρ$ and the $ΣK^*$ thresholds, which can be related to the $N(1700)$ and the $N(2100)$, respectively. No pole n…
Classifying the hidden-charm pentaquarks via a flavor mixing scheme
提出一种基于轻自由度味组分的分类方案，将基态单粲重子与反D介子构成的分子态归类，解释了实验观测到的P_c和P_{cs}态，并预言了单奇异和双奇异隐藏粲束缚态的存在及其质量谱。
Magnetic moments of strange hidden-bottom pentaquarks and the role of spin flavor correlations
在组分夸克模型中，通过分子和紧致两种构型研究奇异隐底五夸克态的磁矩，发现磁性质主要由全局自旋-味道结构和重夸克抑制效应决定，而非夸克的具体聚集方式。
Masses of open- and hidden-charm tetra-quark scalar mesons are studied in a new approach. As the result, newly estimated masses of hidden-charm sector are significantly lower than our earier ones by a naive quark counting. In particular, our new result on the non-strange iso-triplet scalar mesons should be compared with the experiment that an indication of tiny eta pi peak around 3.2 GeV has been observed, while no signal in the eta_c pi channel.
Ratios of Hidden-Charm Compact Pentaquark Decay Widths in Quark-Diquark Model
针对LHCb观测到的隐粲五夸克候选共振态，本文采用紧致双夸克-双夸克-反夸克图像，计算并讨论非奇异五夸克在粲偶素与开粲衰变模式间的宽度比。
Inspired by the newly reported $Z_{cs}(3985)^{-}$ by the BESIII Collaboration, we systematically investigate the strange hidden-charm tetraquark systems $cs\bar{c}\bar{u}$ with two structures: meson-meson and diquark-antidiquark. Two quark models: the chiral quark model (ChQM) and the quark delocalization color screening model (QDCSM) are used here. Similar results are obtained in both two quark models. There is no any bound state in either ChQM or QDCSM, which excludes the molecular state explanation ($D_{s}D^{*}/D_{s}^{*}D/D_{s}^{*}D^{*}$) of the reported $Z_{cs}(3985)^{-}$. However, the eff…
扫码添加微信好友，提出您的宝贵建议 👇
💡 备注请填写：网站反馈
发表机构由 AI 从论文文本抽取，如发现错误，欢迎反馈修正建议。