The 
					
	    
	    
	   tetraquark states and the structure of X(2239) observed by the BESIII collaboration *

Lü, Qi-Fang; Wang, Kai-Lei; Dong, Yubing

doi:10.1088/1674-1137/44/2/024101

Cited by 18 publications

(7 citation statements)

References 87 publications

(167 reference statements)

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“…Some other interpretations of , such as the fourth radial excitation of meson (i.e. ) [112], the state [9,113], or the tetraquark state with [114,115], can be found in the literature. In some works [116], the state was suggested to be an assignment for the resonance listed by the PDG [1].…”

Section: X(2500) ϕϕmentioning

confidence: 99%

Mass spectrum and strong decays of strangeonium in a constituent quark model *

Li¹,

Gui

Liu

et al. 2021

Chinese Phys. C

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In this work we calculate the mass spectrum of strangeonium up to the multiplet within a nonrelativistic linear potential quark model. Furthermore, using the obtained wave functions, we also evaluate the strong decays of the strangeonium states with the model. Based on our successful explanations of the well established states , , , , and , we further discuss the possible assignments of strangeonium-like states from experiments by combining our theoretical results with observations. It is found that some resonances, such as and , listed by the Particle Data Group, and and , newly observed by BESIII, may be interpreted as strangeonium states. The possibility of as a candidate for or cannot be excluded. We expect our results to provide useful references for looking for the missing states in future experiments.

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Section: X(2500) ϕϕmentioning

confidence: 99%

Mass spectrum and strong decays of strangeonium in a constituent quark model *

Li¹,

Gui

Liu

et al. 2021

Chinese Phys. C

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“…This model has been extensively adopted to study the properties of conventional hadrons and it may give a unified description of different flavor sectors. Also, under the diquark approximation, the authors have employed the relativized quark model to deal with the tetraquark states and achieved satisfactory results [86][87][88][89][90][91][92]. Thus, the relativized quark model is suitable for us to deal with the doubly heavy tetraquarks, where all the heavy-heavy, heavy-light, and light-light quark interactions are involved.…”

Section: Introductionmentioning

confidence: 99%

Masses of doubly heavy tetraquarks TQQ′ in a relativized quark model

2020

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In the present work, the mass spectra of doubly heavy tetraquarks T QQ 0 are systematically investigated in a relativized quark model. The four-body systems including the Coulomb potential, confining potential, spin-spin interactions, and relativistic corrections are solved within the variational method. Our results suggest that the IJ P ¼ 01 þ bbūd state is 54 MeV below the relevantBB Ã thresholds, which indicates that both strong and electromagnetic decays are forbidden, and thus this state can be a stable one. Its large hidden color component and small root mean square radius demonstrate that it is a compact tetraquark rather than a loosely bound molecule or pointlike diquark-antidiquark structure. Our predictions of the doubly heavy tetraquarks may provide valuable information for future experimental searches.

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“…The structure is denoted as , which has a mass of MeV and a width of MeV [30]. Some investigations have been performed to interpret [31,32]. From Ref.…”

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confidence: 99%

X(2239) and as hidden-strange molecular states from interaction *

et al. 2020

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In this work, we propose the possible assignment of the newly observed , as well as , as a molecular state from the interaction of a baryon and an antibaryon . With the help of effective Lagrangians, the interaction is described within the one-boson-exchange model with , , , , and exchanges considered. After inserting the potential kernel into the quasipotential Bethe-Salpeter equation, the bound states from the interaction can be studied by searching for the pole of the scattering amplitude. Two loosely bound states with spin parities and appear near the threshold with almost the same parameter. The state can be assigned to observed at BESIII, which is very close to the threshold. The scalar meson can be interpreted as a state from the interaction. The annihilation effect is also discussed through a coupled-channel calculation plus a phenomenological optical potential. It provides large widths to two bound states produced from the interaction. The mass of the state is slightly larger than the mass of the state after including the annihilation effect, which is consistent with our assignment of these two states as and , respectively. The results suggest that further investigation is required to understand the structures near the threshold, such as , , and .

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The tetraquark states and the structure of X(2239) observed by the BESIII collaboration *

Cited by 18 publications

References 87 publications

Mass spectrum and strong decays of strangeonium in a constituent quark model *

Mass spectrum and strong decays of strangeonium in a constituent quark model *

Masses of doubly heavy tetraquarks TQQ′ in a relativized quark model

X(2239) and as hidden-strange molecular states from interaction *

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