Advanced search    

Search: authors:"Zhi-Gang Wang"

67 papers found.
Use AND, OR, NOT, +word, -word, "long phrase", (parentheses) to fine-tune your search.

Strong decays of the Y(4660) as a vector tetraquark state in solid quark-hadron duality

 Wang Open Access Regular Article - Theoretical Physics First Online: 01 March 2019 1 Shares 255 Downloads Abstract In this article, we choose the \([sc]_P[\bar{s}\bar{c}]_A-[sc]_A[\bar

Analysis of the vector tetraquark states with P-waves between the diquarks and antidiquarks via the QCD sum rules

and affiliations Zhi-Gang Wang Open Access Regular Article - Theoretical Physics First Online: 16 January 2019 89 Downloads Abstract In this article, we introduce a P-wave between the

Analysis of the mass and width of the X(4140) as axialvector tetraquark state

In this article, we construct both the \([sc]_T[{\bar{s}}{\bar{c}}]_A+[sc]_A[{\bar{s}}{\bar{c}}]_T\) type and \([sc]_T[{\bar{s}}{\bar{c}}]_V-[sc]_V[{\bar{s}}{\bar{c}}]_T\) type axialvector currents with \(J^{PC}=1^{++}\) to study the mass of the X(4140) with the QCD sum rules. The predicted masses support assigning the X(4140) to be the \([sc]_T[{\bar{s}}{\bar{c}}]_V-[sc]_V[{\bar...

Analysis of the doubly heavy baryon states and pentaquark states with QCD sum rules

 Wang Open Access Regular Article - Theoretical Physics First Online: 15 October 2018 57 Downloads Abstract In this article, we study the doubly heavy baryon states and pentaquark states

Vector tetraquark state candidates: Y(4260 / 4220), Y(4360 / 4320), Y(4390) and Y(4660 / 4630)

In this article, we construct the \(C \otimes \gamma _\mu C\) and \(C\gamma _5 \otimes \gamma _5\gamma _\mu C\) type currents to interpolate the vector tetraquark states, then carry out the operator product expansion up to the vacuum condensates of dimension-10 in a consistent way, and obtain four QCD sum rules. In calculations, we use the formula \(\mu =\sqrt{M^2_{Y}-(2{\mathbb...

Analysis of the triply-charmed pentaquark states with QCD sum rules

In this article, we construct the scalar-diquark–scalar-diquark–antiquark type current to study the ground state triply-charmed pentaquark states with the QCD sum rules. We separate the contributions of the negative-parity and positive-parity triply-charmed pentaquark states explicitly, and take the energy scale formula \(\mu =\sqrt{M^2_{P}-(3{\mathbb {M}}_c)^2}\) to determine...

The magnetic moment of the \(Z_c(3900)\) as an axialvector tetraquark state with QCD sum rules

In this article, we assign the \(Z_c^\pm (3900)\) to be the diquark-antidiquark type axialvector tetraquark state, study its magnetic moment with the QCD sum rules in the external weak electromagnetic field by carrying out the operator product expansion up to the vacuum condensates of dimension 8. We pay special attention to matching the hadron side with the QCD side of the...

Possible pentaquark candidates: new excited \(\Omega _c\) states

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

Analysis of the scalar doubly charmed hexaquark state with QCD sum rules

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.

The decay width of the \(Z_c(3900)\) as an axialvector tetraquark state in solid quark–hadron duality

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...

Analysis of the scalar, axialvector, vector, tensor doubly charmed tetraquark states with QCD sum rules

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...

Coefficient inequalities for Janowski-Sakaguchi type functions associated with conic regions

The purpose of the present paper is to introduce and study some new subclasses of Sakaguchi-type functions defined by using the concept of Janowski functions in conic regions. Various interesting properties such as sufficiency criteria, coefficient estimates and distortion result are investigated for these function classes.

Analysis of the \(QQ\bar{Q}\bar{Q}\) tetraquark states with QCD sum rules

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

Analysis of \(\Omega _c(3000)\) , \(\Omega _c(3050)\) , \(\Omega _c(3066)\) , \(\Omega _c(3090)\) and \(\Omega _c(3119)\) with QCD sum rules

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

Revisit assignments of the new excited \(\Omega _c\) states with QCD sum rules

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

Analysis of the mass and width of Y(4274) as axialvector molecule-like state

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...

Scalar tetraquark state candidates: X(3915), X(4500) and X(4700)

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...

Reanalysis of X(4140) as axial-vector tetraquark state with QCD sum rules

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...

Analysis of the scalar nonet mesons with QCD sum rules

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...

Tetraquark state candidates: Y(4260), Y(4360), Y(4660), and \(Z_c(4020/4025)\)

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...