The mass gaps existing in the discovered single heavy flavor baryons are analyzed, which show some universal behaviors. Under the framework of a constituent quark model, we quantitatively explain why such interesting phenomenon happens, when these established excited heavy baryons are regarded as the $$\lambda $$ -mode excitations. Based on the universal behaviors of the...
We study the $$P_{cs}(4459)^0$$ recently observed by LHCb using the method of QCD sum rules. Our results support its interpretation as the $${{\bar{D}}}^* \varXi _c$$ hadronic molecular state of either $$J^P=1/2^-$$ or $$3/2^-$$ . Within the hadronic molecular picture, the three LHCb experiments observing $$P_c$$ and $$P_{cs}$$ states (Aaij et al., Phys Rev Lett 115:072001, 2015...
Very recently, the BESIII Collaboration reported a charged hidden-charm structure with strangeness in the recoil mass of $$K^+$$ of a process $$e^+e^-\rightarrow D_s^{*-}D^0K^+$$ or $$D_s^{-}D^{*0}K^+$$ , which is named as $$Z_{cs}(3985)^{-}$$ . The newly observed charged structure can be treated as a partner structure with strangeness of well-known $$Z_{c}(3885)^{-}$$ reported...
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 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...
The mass spectrum of the kaon family is analyzed by the modified Godfrey–Isgur model with a color screening effect approximating the kaon as a heavy–light meson system. This analysis gives us the structure and possible assignments of the observed kaon candidates, which can be tested by comparing the theoretical results of their two-body strong decays with the experimental data...
Symmetries and the Emergence of Structure in QCD. This work is also supported by China Postdoctoral Science Foundation under Grant no. 2016M601133. T. Matsuki wishes to thank Yubing Dong of IHEP, and Xiang ... Liu of Lanzhou university for their kind hospitality at each institute and university where part of this work was carried out. Open Access This article is distributed under the terms of the Creative
Employing the relativized quark model and the quark-interchange model, we investigate the decay of the charged heavy quarkonium-like states \(Z_c(3900)\), \(Z_c(4020)\), \(Z_c(4430)\), \(Z_b(10610)\) and \(Z_b(10650)\) into the ground and radially excited heavy quarkonia via emitting a pion meson. The \(Z_c\) and \(Z_b\) states are assumed to be hadronic molecules composed of...
, and U1204115. Xiang Liu is also supported by the National Program for Support of Top-notch Young Professionals. Open Access This article is distributed under the terms of the Creative Commons
We study the charmonium \(p \bar{p} \rightarrow \psi (3770) \pi ^0\) reaction using the effective Lagrangian approach where the contributions from well-established \(N^*\) states are considered, and all parameters are fixed in the process of \(e^+e^- \rightarrow p \bar{p}\pi ^0\) at center of mass energy \(\sqrt{s} = 3.773\) GeV. The experimental data on the line shape of the...
We give an explicit QCD sum rule investigation for hidden-charm baryonium states with the quark content \(u\bar{u} d\bar{d} c\bar{c}\), spin \(J=0/1/2/3\), and of both positive and negative parities. We systematically construct the relevant local hidden-charm baryonium interpolating currents, which can actually couple to various structures, including hidden-charm baryonium states...
Based on the fact that the long expected pentaquark which possesses the exotic quantum numbers of \(B=1\) and \(S=1\) was not experimentally found, although exotic states of \(XYZ\) have been observed recently, we conjecture that the heavy flavors may play an important role in stabilizing the hadronic structures beyond the traditional \(q\bar{q}\) and \(qqq\) composites.
. 11261130311 and 973 program. Xiang Liu is also supported by the National Program for Support of Top-notch Young Professionals and the Fundamental Research Funds for the Central Universities. Open Access This
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 _...
Natural Science Foundation of China under Grants Nos. 11375128, 1135009, 11222547, 11175073. Xiang Liu is also supported by the National Youth Top-notch Talent Support Program (?Thousands-of-Talents Scheme
In this work, we study the \(T\bar{T}\)-type molecular systems systematically via the one pion exchange model, where T denotes the narrow \(J^P=1^+\) \(D_1\) meson or \(2^+\) \(D_2^*\) meson and \(\bar{T}\) is its antiparticle. With the effective potentials, we try to find the bound-state solutions of the corresponding systems, which provide crucial information of whether \(T\bar...
Eur. Phys. J. C Hua-Xing Chen Er-Liang Cui Wei Chen Xiang Liu Shi-Lin Zhu We investigate the newly observed X (4500) and X (4700) based on the diquark-antidiquark configuration within the ... Fundamental Research Funds for the Central Universities), 973 program. Xiang Liu is also supported by the National Youth Top-notch Talent Support Program (“Thousands-of-Talents Scheme”). Open Access This
Background Vetiver grass (Vetiveria zizanioides L.) is widely used in more than 120 countries for land management (e.g. rehabilitation of saline lands). A wild ecotype of vetiver grass was found in southern China in the 1950s, but little is known about its adaptability to saline stress. For the purpose of understanding its tolerance to salinity as well as corresponding tolerance...
Newly observed two charmed-strange resonances, \(D_{s1}^*(2860)\) and \(D_{s3}^*(2860)\), are investigated by calculating their Okubo–Zweig–Iizuka-allowed strong decays, which shows that they are suitable candidates for the \(1^3D_1\) and \(1^3D_3\) states in the charmed-strange meson family. Our study also predicts other main decay modes of \(D_{s1}^*(2860)\) and \(D_{s3}^*(2860...