The Genuine Resonance of Full-Charm Tetraquarks

In this work, the genuine resonance states of full-charm tetraquark systems with quantum numbers JPC=0++,1+−,2++ are searched in a nonrelativistic chiral quark model with the help of the Gaussian Expansion Method. In this calculation, two structures, meson-meson and diquark–antidiquark, as well as their mixing with all possible color-spin configurations, are considered. The results show that no bound states can be formed. However, resonances are possible because of the color structure. The genuine resonances are identified by the stabilization method (real scaling method). Several resonances for the full-charm system are proposed, and some of them are reasonable candidates for the full-charm states recently reported by LHCb.

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Two-body strong decay of light mesons with Gaussian expansion method

International Journal of Modern Physics A ◽

10.1142/s0217751x14501759 ◽

2014 ◽

Vol 29 (30) ◽

pp. 1450175 ◽

Cited By ~ 2

Author(s):

Xiaoyun Chen ◽

Zhaozhao Yan ◽

Jialun Ping

Keyword(s):

Experimental Data ◽

Harmonic Oscillator ◽

Quark Model ◽

Expansion Method ◽

Wave Functions ◽

Chiral Quark Model ◽

Strong Decay ◽

Exotic States ◽

Gaussian Expansion Method ◽

Normal States

In this paper, we survey the radial and orbital excitations of I = 0 and [Formula: see text] systems anticipated up to 2.0 GeV in the framework of the chiral quark model. The Schrödinger equation is solved by using Gaussian expansion method. And using the wave functions obtained, instead of the simple harmonic oscillator wave functions, we study systematically the two-body strong decay (limited to S + S modes) of the systems. By comparing with the experimental data, we try to identify the normal states and exotic states.

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Full-heavy tetraquarks in constituent quark models

The European Physical Journal C ◽

10.1140/epjc/s10052-020-08650-z ◽

2020 ◽

Vol 80 (11) ◽

Cited By ~ 1

Author(s):

Xin Jin ◽

Yaoyao Xue ◽

Hongxia Huang ◽

Jialun Ping

Keyword(s):

Quark Model ◽

Constituent Quark ◽

Resonance State ◽

Bound State ◽

Chiral Quark Model ◽

Present Calculation ◽

Resonance States ◽

Screening Model ◽

Quantum Numbers ◽

Quark Models

AbstractThe full-heavy tetraquarks $$bb{\bar{b}}{\bar{b}}$$ b b b ¯ b ¯ and $$cc{\bar{c}}{\bar{c}}$$ c c c ¯ c ¯ are systematically investigated within the chiral quark model and the quark delocalization color screening model. Two structures, meson–meson and diquark–antidiquark, are considered. For the full-beauty $$bb{\bar{b}}{\bar{b}}$$ b b b ¯ b ¯ systems, there is no any bound state or resonance state in two structures in the chiral quark model, while the wide resonances with masses around $$19.1-19.4$$ 19.1 - 19.4 GeV and the quantum numbers $$J^{P}=0^{+}$$ J P = 0 + , $$1^{+}$$ 1 + , and $$2^{+}$$ 2 + are possible in the quark delocalization color screening model. For the full-charm $$cc{\bar{c}}{\bar{c}}$$ c c c ¯ c ¯ systems, the results are qualitative consistent in two quark models. No bound state can be found in the meson–meson configuration, while in the diquark–antidiquark configuration there may exist the resonance states, with masses range between 6.2 to 7.4 GeV, and the quantum numbers $$J^{P}=0^{+}$$ J P = 0 + , $$1^{+}$$ 1 + , and $$2^{+}$$ 2 + . And the separation between the diquark and the antidiquark indicates that these states may be the compact resonance states. The reported state X(6900) is possible to be explained as a compact resonance state with $$IJ^{P}=00^{+}$$ I J P = 00 + in present calculation. All these full-charm resonance states are worth searching in the experiments further.

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Investigation of $$\varXi _c^0$$ in a chiral quark model

The European Physical Journal C ◽

10.1140/epjc/s10052-021-09175-9 ◽

2021 ◽

Vol 81 (4) ◽

Author(s):

Xiaohuang Hu ◽

Yue Tan ◽

Jialun Ping

Keyword(s):

Quark Model ◽

Expansion Method ◽

Invariant Mass Spectrum ◽

Negative Parity ◽

Lhcb Collaboration ◽

Chiral Quark Model ◽

Quantum Numbers ◽

New States ◽

Quark Structure ◽

The Masses

AbstractRecently, three new states of $$\varXi _c^0$$ Ξ c 0 were observed in the invariant mass spectrum of $$\varLambda ^+_cK^-$$ Λ c + K - by LHCb collaboration. In this work, we use a chiral quark model to investigate these three exited states with the help of Gaussian expansion method both in three-quark structure and in five-quark structure with all possible quantum numbers $$IJ^P=\frac{1}{2}(\frac{1}{2})^-$$ I J P = 1 2 ( 1 2 ) - , $$\frac{1}{2}(\frac{3}{2})^-$$ 1 2 ( 3 2 ) - , $$\frac{1}{2}(\frac{5}{2})^-$$ 1 2 ( 5 2 ) - , $$\frac{3}{2}(\frac{1}{2})^-$$ 3 2 ( 1 2 ) - , $$\frac{3}{2}(\frac{3}{2})^-$$ 3 2 ( 3 2 ) - and $$\frac{3}{2}(\frac{5}{2})^-$$ 3 2 ( 5 2 ) - . The calculations shows that the masses of 2S and 1D states of $$\varXi _c$$ Ξ c are comparable to experimental results; In addition, the resonance states of five-quark configuration are possible candidates of these new states with negative parity by using the real scaling method and their decay width is also given.

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POSSIBLE $D\bar{D}$ AND $B\bar{B}$ MOLECULAR STATES IN A CHIRAL QUARK MODEL

International Journal of Modern Physics A ◽

10.1142/s0217751x12501618 ◽

2012 ◽

Vol 27 (27) ◽

pp. 1250161 ◽

Cited By ~ 9

Author(s):

M. T. LI ◽

W. L. WANG ◽

Y. B. DONG ◽

Z. Y. ZHANG

Keyword(s):

Quark Model ◽

Systematic Study ◽

Bound States ◽

Effective Interaction ◽

Bound State ◽

Chiral Quark Model ◽

State Problem ◽

Bound State Problem

We perform a systematic study of the bound state problem of [Formula: see text] and [Formula: see text] systems by using effective interaction in our chiral quark model. Our results show that both the interactions of [Formula: see text] and [Formula: see text] states are attractive, which consequently result in [Formula: see text] and [Formula: see text] bound states.

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Doubly charmed multibaryon systems

The European Physical Journal C ◽

10.1140/epjc/s10052-020-8320-0 ◽

2020 ◽

Vol 80 (8) ◽

Author(s):

H. Garcilazo ◽

A. Valcarce

Keyword(s):

Quark Model ◽

Bound States ◽

Constituent Quark ◽

Constituent Quark Model ◽

Heavy Quarks ◽

Separation Energy ◽

Quantum Numbers ◽

Body State

Abstract We study two- and three-baryon systems with two units of charm looking for possible bound states or resonances. All two-baryon interactions are consistently derived from a constituent quark model tuned in the light-flavor hadron phenomenology: spectra and interactions. The presence of the heavy quarks makes the two-body interactions simpler than in the light-flavor sector. Our results show a narrow two-body resonance with quantum numbers $$(I,J^P)=(0,0^+)$$(I,JP)=(0,0+). It is located 6.2 MeV below the $$\Sigma _c\Sigma _c$$ΣcΣc threshold and has a width of 4.7 MeV. The foregoing two-body state contributes to generate a $$N \Sigma _c\Sigma _c$$NΣcΣc resonance with quantum numbers $$(I,J^P)=(1/2,1/2^+)$$(I,JP)=(1/2,1/2+) and a separation energy of 0.2 MeV.

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The possible strangeness dibaryon states in a chiral quark model

Modern Physics Letters A ◽

10.1142/s0217732315500480 ◽

2015 ◽

Vol 30 (09) ◽

pp. 1550048

Author(s):

L. R. Dai ◽

L. Yuan ◽

N. Zheng ◽

X. S. Kang ◽

S. L. Yuan ◽

...

Keyword(s):

Quark Model ◽

Bound States ◽

Good Description ◽

Nucleon Nucleon ◽

Group Method ◽

Model Parameters ◽

Chiral Quark Model ◽

Scalar Mesons ◽

Ideal Mixing ◽

The Ideal

Considering the mixing of scalar mesons, the ΩΩ and Ξ*Ω systems are dynamically investigated within the framework of the chiral SU(3) quark model by solving the resonating group method (RGM) equation. The model parameters are taken from our previous work, which gave a good description of the energies of the baryon ground states, the binding energy of deuteron, and the experimental data of the nucleon–nucleon (NN) and nucleon–hyperon (NY) scattering processes. Two different mixing cases, one is the ideal mixing and another is 19° mixing, are discussed. The results show that no matter what kind of mixing is adopted, the ΩΩ and Ξ*Ω systems are still bound states. It is also shown that they are deeply bound if 19° mixing is adopted.

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