In a molecular scenario, we investigate the isospin-breaking hidden charm decay processes of X(3872), i.e., $$X(3872) \rightarrow \pi ^+ \pi ^- J/\psi $$ , $$X(3872) \rightarrow \pi ^+ \pi ^- \pi ^0 J/\psi $$ , and $$X(3872)\rightarrow \pi ^0\chi _{cJ}$$ . We assume that the source of the strong isospin violation comes from the different coupling strengths of X(3872) to its...
Inspired by recent measurement of possible fully charmed tetraquarks in LHCb Collaboration, we investigate the mass spectra of fully heavy tetraquarks $$QQ {\bar{Q}} {\bar{Q}}$$ in an extended relativized quark model. Our estimations indicate that the broad structure around 6.4 GeV should contain one or more ground states for $$cc {\bar{c}} {\bar{c}}$$ tetraquarks, while the...
Different from the usual tetraquark assignment to charged $$Z_c(3885)$$ and $$Z_c(4025)$$ charmoniumlike structures, in this letter we propose a universal non-resonant explanation to decode these $$Z_c$$ ’s, which is based on a special dynamical behavior of $$e^+e^-\rightarrow D^{(*)}{\bar{D}}^*\pi $$ . Our study shows that $$Z_c(3885)$$ and $$Z_c(4025)$$ are only the reflection...
In this work, we systemically investigate the molecular states from the \(\varSigma ^{(*)}_c{\bar{D}}^{(*)}-\varLambda _c{\bar{D}}^{(*)}\) interaction with the help of the Lagrangians with heavy quark and chiral symmetries in a quasipotential Bethe–Salpeter equation (qBSE) approach. The molecular states are produced from isodoublet (I=1/2) \(\varSigma _c{\bar{D}}\) interaction...
In 2017, the BESIII Collaboration announced the observation of a charged charmonium-like structure in the \(\psi (3686)\pi ^\pm \) invariant mass spectrum of the \(e^+ e^- \rightarrow \psi (3686) \pi ^+ \pi ^-\) process at different energy points, which enables us to perform a precise study of this process based on the initial single pion emission (ISPE) mechanism. In this work...
Eur. Phys. J. C Zc(3900)/Zc(3885) as a virtual state from π J/ψ − D¯ ∗ D interaction Jun He 1 Dian-Yong Chen 0 0 School of Physics, Southeast University , Nanjing 210094 , China 1 Department of
In the present work, we propose to search the charmonium-like states \(Z_c(3900\)) and \(Z_c(4020)\) in the \(B_c\) decay. In an effective Lagrangian approach, the branching ratios of \(B_c^+ \rightarrow Z_c(3900)^+ \pi ^0\) and \(B_c^+\rightarrow Z_c (4020)^+ \pi ^0\) are estimated to be of order of \(10^{-4}\) and \(10^{-7}\), respectively. The large production rate of \(Z_c...
In the present work, we propose Y(4140) as the \(\chi _{c1}(3P)\) state by studying the \(\chi _{c1} \pi ^+ \pi ^-\) invariant mass spectrum of the \(B\rightarrow K \chi _{c1} \pi ^+ \pi ^-\) process. In the \(D\bar{D}\) invariant mass spectrum of the \(B\rightarrow K D\bar{D}\) process, we find a new resonance with the mass and width to be (\( 4083.0 \pm 5.0\)) and (\(24.1 \pm...
Eur. Phys. J. C Dian-Yong Chen 0 0 Department of Physics, Southeast University , Nanjing 210094 , People's Republic of China In the present work, we propose Y (4140) as the χc1(3 P) state by
Invoked by the recent observation of Y(4390) at BESIII, which is about 40 MeV below the \({D^{*}}(2010){\bar{D}}_1(2420)\) threshold, we investigate possible bound and resonance states from the \({D^{*}}(2010){\bar{D}}_1(2420)\) interaction with the one-boson-exchange model in a quasipotential Bethe–Salpeter equation approach. A bound state with quantum number \(0^-(1...
In this work, we investigate the hadronic loop contributions to the \(\Upsilon (6S) \rightarrow \chi _{bJ} \phi ~(J=0,1,2)\) along with \(\Upsilon (6S) \rightarrow \chi _{bJ} \omega ~(J=0,1,2)\) transitions. We predict that the branching ratios of \(\Upsilon (6S) \rightarrow \chi _{b0} \phi \), \(\Upsilon (6S) \rightarrow \chi _{b1} \phi \) and \(\Upsilon (6S) \rightarrow \chi _...
Inspired by the similarity between the mass gaps of the \(J/\psi \) and \(\Upsilon \) families, the prediction of a missing higher charmonium with mass 4,263 MeV and very narrow width is made. In addition, the properties of two charmonium-like states, \(X(3940)\) and \(X(4160)\), and charmonium \(\psi (4415)\) are discussed, where our calculation shows that \(X(3940)\) as \(\eta...
