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A survey of heavy–heavy hadronic molecules

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Communications in Theoretical Physics 2021年第12期73卷 86-104页

作者： Xiang-Kun Dong Feng-Kun Guo bing-song zou CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China School of Physics Central South UniversityChangsha 410083China

The spectrum of hadronic molecules composed of heavy-antiheavy charmed hadrons has been obtained in our previous *** potentials are constants at the leading order,which are estimated from resonance *** experimental candidates of hadronic molecules,say X(3872),Y(4260),three P_(c)states and P_(cs)(4459),fit the spectrum *** success in describing the pattern of heavy-antiheavy hadronic molecules stimulates us to give more predictions for the heavy-heavy cases,which are less discussed in literature than the heavy-antiheavy *** that the heavy-antiheavy hadronic molecules,several of which have strong experimental evidence,emerge from the dominant constant interaction from resonance saturation,we find that the existence of many heavy-heavy hadronic molecules is *** these predicted heavy-heavy states we highlight the DD;molecule and the D^(*)∑_(c)^(*)molecules,which are the partners of the famous X(3872)and Pc *** recently,LHCb collaboration reported a doubly charmed tetraquark state,T_(cc),which is in line with our results for the DD^(*)*** the first experimental signal of this new kind of exotic states,the upcoming update of the LHCb experiment as well as other experiments will provide more chances of observing the heavy-heavy hadronic molecules.

关键词： hadronic molecules heavy-heavy systems Bethe-Salpeter equation constant interaction resonance saturation

Building up the spectrum of pentaquark states as hadronic molecules

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Science Bulletin 2021年第13期66卷 1258-1259页

作者： bing-song zou CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China School of Physics Central South UniversityChangsha 410083China

Following the observation of three narrow N^(*)pentaquark states with hidden charm,P_(c)(4312),P_(c)(4440)and P_(c)(4457)[1,2],very recently,the LHCb Collaboration reported the first evidence for their strangeΛ*coun... 详细信息

关键词：强子五夸克态谱学

Review of the Low-Lying Excited Baryons ∑^(*)(1/2^(-))

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Chinese Physics Letters 2024年第10期41卷 31-37页

作者： En Wang Li-Sheng Geng Jia-Jun Wu Ju-Jun Xie bing-song zou School of Physics Zhengzhou UniversityZhengzhou 450001China Guangxi Key Laboratory of Nuclear Physics and Nuclear Technology Guangxi Normal UniversityGuilin 541004China School of Physics Beihang UniversityBeijing 102206China Peng Huanwu Collaborative Center for Research and Education Beihang UniversityBeijing 100191China Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 102206China Southern Center for Nuclear-Science Theory(SCNT) Institute of Modern PhysicsChinese Academy of SciencesHuizhou 516000China School of Physics University of Chinese Academy of SciencesBeijing 100049China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China School of Nuclear Sciences and Technology University of Chinese Academy of SciencesBeijing 101408China Department of Physics Tsinghua UniversityBeijing 100084China CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China

Strong empirical and phenomenological indications exist for large sea-quark admixtures in the low-lying excited *** the low-lying excited baryon ∑^(*)(1/2^(-))is important for determining the nature of the low-lying ... 详细信息

关键词： excited quark determining

Interpretation of the η1(1855) as a K■1(1400) + c.c. molecule

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Science China(Physics,Mechanics & Astronomy) 2022年第6期65卷 64-70页

作者： Xiang-Kun Dong Yong-Hui Lin bing-song zou CAS Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences School of Physical Sciences University of Chinese Academy of Sciences Helmholtz-Institut für Strahlen-und Kernphysik and Bethe Center for Theoretical Physics Universit?t Bonn School of Physics Central South University

An exotic state with JPC= 1-+, denoted by η1(1855), was observed by BESⅢ Collaboration recently in J/ψ → γηη′. The fact that its mass is just below the threshold of K■1(1400) stimulates us to investigate whether this exotic state can be interpreted as a K■1(1400) + c.c. molecule or not. Using the one boson exchange model, we show that it is possible for K■1(1400) with JPC= 1-+to bind together by taking the momentum cutoff Λ ≥2 Ge V and yield the same binding energy as the experimental value when Λ ≈ 2.5 GeV. In this molecular picture, the predicted branch ratio Br(η1(1855) → ηη′) ≈ 15% is consistent with the experimental results, which again supports the molecular explanation of η1(1855). Relevant systems, namely K■1(1400) with JPC= 1--and K■1(1270) with JPC= 1-±, are also investigated, some of which can be searched for in the future experiments.

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Interpretation of the η;（1855） as a K■;（1400） + c.c. molecule

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Science China(Physics,Mechanics & Astronomy) 2022年

An exotic state with J;=1;,denoted by η;（1855）,was observed by BESIII Collaboration recently in J/ψ→γηη;.The fact that its mass is just below the threshold of K■;（1400） stimulates us to investigate whether this exotic state can be interpreted as a K■;（1400）+*** or *** the one boson exchange model,we show that it is possible for K■;（1400） with J;=1;to bind together by taking the momentum cutoffΛ2 GeV and yield the same binding energy as the experimental value whenΛ≈2.5 *** this molecular picture,the predicted branch ratio Br(η;（1855）→ηη;)≈15%is consistent with the experimental results,which again supports the molecular explanation ofη;（1855）.Relevant systems,namely K■;（1400） with J;=1;and K■;（1270） with J;=1;,are also investigated,some of which can be searched for in the future experiments.

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Pentaquark components in baryons

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Pentaquark components in baryons

Strangeness in the Proton and N*（1535）

The 6th China-Nuclear Physics Symposium

作者： bing-song zou

Evidence for large pentaquark components in baryons is becoming convincing from the newest results of gO electron-proton scattering experiment and BES J/psi experiment. A configuration similar to a diquark-model confi...

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Strangeness in the Proton and N*（1535）

Strangeness in the Proton and N*(1535)

China-US Symposium on Medium Energy Physics and Workshop

作者： bing-song zou Institute of High Energy Physics Beijing

＜正＞SU（3） 3q-quark model for baryons is Outstanding problems for the classical 3q model What are effective degrees of freedom ?.Strangeness in the proton s / s asymmetry meson cloud model The strange magnetic mome...

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Strangeness in the Proton and N*(1535)

Is the existence of a J/ψJ/ψbound state plausible?

The 6th China-Nuclear Physics Symposium

作者： bing-song zou Institute of High Energy Physics CAS, Beijing

Predictions for the strangeness in the proton: meson cloud : Ds 0 , rs > 0 5-quark components in baryons are important The diquark cluster picture reproduces naturally the mass pattern for N*(1535) ,N*(1440), L*(1405...

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Science Bulletin 2021年第24期66卷 2462-2470,M0003页

作者： Xiang-Kun Dong Vadim Baru Feng-Kun Guo Christoph Hanhart Alexey Nefediev bing-song zou CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Institut für Theoretische Physik Ⅱ Ruhr-Universität BochumBochum D-44780Germany Institute for Theoretical and Experimental Physics NRC“Kurchatov Institute” Moscow 117218Russia Institute for Advanced Simulation Institut für Kernphysik and Jülich Center for Hadron PhysicsForschungszentrum JülichJülich D-52425Germany P.N.Lebedev Physical Institute of the Russian Academy of Sciences Moscow 119991Russia Moscow Institute of Physics and Technology Moscow 141700Russia School of Physics Central South UniversityChangsha 410083China

In a recent measurement LHCb reported pronounced structures in the J/ψJ/ψ*** of the various possible explanations of those is that they emerge from non-perturbative interactions of vector *** is thus important to understand whether it is possible to form a bound state of two charmonia interacting through the exchange of gluons,which hadronise into two pions at the longest *** this paper,we demonstrate that,given our current understanding of hadron-hadron interactions,the exchange of correlated light mesons(pions and kaons)is able to provide sizeable attraction to the di-J/ψsystem,and it is possible for two J/ψmesons to form a bound *** a side result we find from an analysis of the data for theψ/(2 S)J/ψππtransition including bothππand KK final state interactions an improved value for theψ(2 S)→J/ψtransition chromo-electric polarisability:|αψ(2 S)J/ψ|=(1.8±0.1)GeV-3,where the uncertainty also includes the one induced by the final state interactions.

关键词： Fully-charm tetraquark Hadronic molecule Exotic hadron Dispersion relation