39 papers found.

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In this article, we construct the axialvector-diquark–axialvector-antidiquark type currents to interpolate the scalar, axialvector, vector, tensor doubly charmed tetraquark states, and study them with QCD sum rules systematically by carrying out the operator product expansion up to the vacuum condensates of dimension 10 in a consistent way, the predicted masses can be confronted ...

In this article, we tentatively assign the \(Z_c^\pm (3900)\) to be the diquark–antidiquark type axialvector tetraquark state, study the hadronic coupling constants \(G_{Z_cJ/\psi \pi }, G_{Z_c\eta _c\rho }, G_{Z_cD \bar{D}^{*}}\) with the QCD sum rules in details. We take into account both the connected and disconnected Feynman diagrams in carrying out the operator product ...

In this article, we study the scalar-diquark–scalar-diquark–scalar-diquark type hexaquark state with the QCD sum rules by carrying out the operator product expansion up to the vacuum condensates of dimension 16. We obtain a lowest hexaquark mass of \(6.60^{+0.12}_{-0.09}\,\mathrm {GeV}\), which can be confronted with the experimental data in the future.

Eur. Phys. J. C
Analysis of the Q Q Q¯ Q¯ tetraquark states with QCD sum rules
**Zhi**-**Gang** **Wang** 0
0 Department of Physics, North China Electric Power University , Baoding 071003 , People's Republic of

Eur. Phys. J. C
c states with QCD sum
**Zhi**-**Gang** **Wang** 0
Xing-Ning Wei 0
Ze-Hui Yan 0
0 Department of Physics, North China Electric Power University , Baoding 071003 , People's Republic of China
In

Eur. Phys. J. C
Analysis of c(3000), with QCD sum rules
**Zhi**-**Gang** **Wang** 0
0 Department of Physics, North China Electric Power University , Baoding 071003 , People's Republic of China
In this article

In this article, we assign Y(4274) to the color octet–octet type axialvector molecule-like state with \(J^{PC}=1^{++}\) tentatively, and construct the color octet–octet type axialvector current to study its mass and width with the QCD sum rules in details. The predicted mass favors assigning the Y(4274) to a color octet–octet type molecule-like state, but the predicted width ...

In this article, we tentatively assign the X(3915) and X(4500) to be the ground state and the first radial excited state of the axialvector–diquark–axialvector–antidiquark type scalar \(cs\bar{c}\bar{s}\) tetraquark states, respectively, assign the X(4700) to be the ground state vector–diquark–vector–antidiquark type scalar \(cs\bar{c}\bar{s}\) tetraquark state, and study their ...

In this article, we take X(4140) as the diquark–antidiquark type \(cs\bar{c}\bar{s}\) tetraquark state with \(J^{PC}=1^{++}\), and we study the mass and pole residue with the QCD sum rules in detail by constructing two types of interpolating currents. The numerical results \(M_{X_{L,+}}=3.95\pm 0.09\,\mathrm{GeV}\) and \(M_{X_{H,+}}=5.00\pm 0.10\,\mathrm{GeV}\) disfavor assigning ...

In this article, we assume that the nonet scalar mesons below \(1\,\mathrm { GeV}\) are the two-quark–tetraquark mixed states and study their masses and pole residues using the QCD sum rules. In the calculation, we take into account the vacuum condensates up to dimension 10 and the \(\mathcal {O}(\alpha _s)\) corrections to the perturbative terms in the operator product expansion. ...

In this article, we construct the axialvector-diquark–axialvector-antidiquark type tensor current to interpolate both the vector- and the axialvector-tetraquark states, then calculate the contributions of the vacuum condensates up to dimension 10 in the operator product expansion, and we obtain the QCD sum rules for both the vector- and the axialvector-tetraquark states. The ...

In this article, we study the ground states and the first radial excited states of the tensor–tensor type scalar hidden-charm tetraquark states with the QCD sum rules. We separate the ground state contributions from the first radial excited state contributions unambiguously, and obtain the QCD sum rules for the ground states and the first radial excited states, respectively. Then ...

Eur. Phys. J. C
Analysis of the strong decay X (5568) → Bs0π + with QCD sum rules
**Zhi**-**Gang** **Wang** 0
0 Department of Physics, North China Electric Power University , Baoding 071003 , People's Republic

In this article, we construct both the axialvector-diquark–axialvector-diquark–antiquark type and the axialvector-diquark–scalar-diquark–antiquark type interpolating currents, then calculate the contributions of the vacuum condensates up to dimension 10 in the operator product expansion, and we study the masses and pole residues of the \(J^P={\frac{1}{2}}^\pm \) hidden-charm ...

In this article, we construct the diquark–diquark–antiquark type interpolating currents, and we study the masses and pole residues of the \(J^P={\frac{3}{2}}^-\) and \({\frac{5}{2}}^+\) hidden charm pentaquark states in detail with the QCD sum rules by calculating the contributions of the vacuum condensates up to dimension-10 in the operator product expansion. In the calculations, ...

In this article, we calculate the contributions of the vacuum condensates up to dimension-6 including the \({\mathcal {O}}(\alpha _s)\) corrections to the quark condensates in the operator product expansion, then we study the masses and decay constants of the pseudoscalar, scalar, vector, and axial-vector heavy-light mesons with the QCD sum rules in a systematic way. The masses of ...

In this article, we present the scalar-diquark–scalar-diquark–antiquark type and scalar-diquark–axialvector-diquark–antiquark type pentaquark configurations in the diquark model, and study the masses and pole residues of the \(J^P={\frac{1}{2}}^\pm \) hidden-charm pentaquark states in detail with the QCD sum rules by extending our previous work on the \(J^P={\frac{3}{2}}^-\) and ...

Eur. Phys. J. C
Analysis of the
**Zhi**-**Gang** **Wang** 0
0 Department of Physics, North China Electric Power University , Baoding 071003 , People's Republic of China
In this article, we study the charmed

**Zhi**-**Gang** **Wang**
0
0
Department of Physics, North China Electric Power University
,
Baoding 071003
,
People's Republic of China
In the article, we assume the two scalar nonet mesons below and above 1

**Zhi**-**Gang** **Wang**
0
0
Department of Physics, North China Electric Power University
,
Baoding 071003
,
People's Republic of China
In this article, we take the Ds3(2860) and Ds1(2860) as the 13D3 and