190 citations · 663 across the 34 of their papers we have counts for
21 papers · 1 filter
Physical Angular Momentum Separation for QED
Weimin Sun
We study the non-uniqueness problem of the gauge-invariant angular momentum separation for the case of QED, which stems from the recent controversy concerning the proper definition…
Gauge invariance, Lorentz covariance and canonical quantization in nucleon structure studies
Fan Wang, X. S. Chen, W. M. Sun +2
There are different operators of quark and gluon momenta, orbital angular momenta, and gluon spin in the nucleon structure study. The precise meaning of these operators are studied…
A model study of the chiral phase diagram of QCD
Bin Wang, Zhu-Fang Cui, Wei-Min Sun +1
In this paper we study the chiral phase transition of QCD at finite temperature and density by using the rank-2 confining separable gluon propagator model in the framework of Dyson…
A thermodynamically consistent quasi-particle model without density-dependent infinity of the vacuum zero point energy
Liu-jun Luo, Jing Cao, Yan Yan +2
In this paper, we generalize the improved quasi-particle model proposed in J. Cao et al., [ Phys. Lett. B {\bf711}, 65 (2012)] from finite temperature and zero chemical potential t…
The Wigner Solution and QCD Phase Transitions in a Modified PNJL Model
Zhu-fang Cui, Chao Shi, Wei-min Sun +2
By employing some modification to the widely used two-flavor Polyakov-loop extended Nambu-Jona-Lasinio (PNJL) model, we discuss the Wigner solution of the quark gap equation at fin…
A thermodynamically consistent quasi-particle model without temperature-dependent infinity of the vacuum zero point energy
Jing Cao, Yu Jiang, Wei-min Sun +1
In this paper, an improved quasi-particle model is presented. Unlike the previous approach of establishing quasi-particle model, we introduce a classical background field (it is al…
Calculation of bulk viscosity of QCD at zero temperature and finite chemical potential
Ming-Min Wang, Yu Jiang, Bin Wang +2
In this letter, based on Kubo's formula and the QCD low energy theorem, we propose a direct formula for calculating the bulk viscosity of QCD at finite chemical potential and z…
The Wigner solution of quark gap equation at nonzero current quark mass and partial restoration of chiral symmetry at finite chemical potential
Yu Jiang, Hao Gong, Wei-min Sun +1
According to the generally accepted phase diagram of QCD, at low temperature and high baryon number density the chiral phase transition of QCD is of first order and the co-existenc…
Effect of gauge boson mass on the phase structure of QED
Jian-Feng Li, Yu-Qing Zhou, Hong-Tao Feng +2
Dynamical chiral symmetry breaking (DCSB) in QED with finite gauge boson mass is studied in the framework of the rainbow approximation of Dyson-Schwinger equations. By adopti…
The Equation of State and Quark Number Susceptibility in Hard-Dense-Loop Approximation
Yu Jiang, Hua Li, Shi-song Huang +2
Based on the method proposed in [ H. S. Zong, W. M. Sun, Phys. Rev. \textbf{D 78}, 054001 (2008)], we calculate the equation of state (EOS) of QCD at zero temperature and finite qu…
Calculation of tensor susceptibility beyond rainbow-ladder approximation of Dyson-Schwinger equations approach
Yuan-mei Shi, Hui-xia Zhu, Wei-min Sun +1
In this paper, we extend the calculation of tensor vacuum susceptibility in the rainbow-ladder approximation of the Dyson-Schwinger (DS) approach in [Y.M.Shi, K.P.Wu, W.M.Sun, H.S.…
The Quark Number Susceptibility in Hard-Thermal-Loop Approximation
Yu Jiang, Hui-xia Zhu, Wei-min Sun +1
With the aid of the vector Ward-Takahashi identity we derive a general formula for the quark number susceptibility (QNS) which expresses the QNS as an integral expression only invo…
Gauge invariant hydrogen atom Hamiltonian
Wei-Min Sun, Xiang-Song Chen, Xiao-Fu Lu +1
For quantum mechanics of a charged particle in a classical external electromagnetic field, there is an apparent puzzle that the matrix element of the canonical momentum and Hamilto…
Crossover from a continuum study of chiral susceptibility
Min He, Fei Hu, Wei-Min Sun +1
We derive a model-independent integral formula for chiral susceptibility and attempt to present a continuum model study of it within the framework of Dyson-Schwinger Equations. An…
Quark number susceptibility around the critical end point
Min He, Jian-Feng Li, Wei-Min Sun +1
The quark number susceptibility is expressed as an integral in terms of dressed quark propagator and dressed vector vertex. It is then investigated with the latter two- and three-p…
Comment to: "A note on failure of the ladder approximation to QCD" [Phys. Lett. B 640 (2006) 196 ]
V. Gogokhia
In the paper [Hong-Shi Zong, Wei-Min Sun, Phys. Lett. B 640 (2006) 196], the authors claim that our proof of the inconsistency of the ladder approximation to QCD [Phys. Lett. B 611…
Spin and orbital angular momentum in gauge theories (II): QCD and nucleon spin structure
X. S. Chen, X. F. Lü, W. M. Sun +2
Parallel to the construction of gauge invariant spin and orbital angular momentum for QED in paper (I) of this series, we present here an analogous but non-trivial solution for QCD…
Quantum Version of Gauge Invariance and Nucleon Internal Structure
Fan Wang, Wei-Min Sun, Xiao-Fu Lü
The conflict between cononical commutation relation and gauge invariance, which both the momentum and angular momentum of quark and gluon should satisfy, is clarified. The quantum…
Pion susceptibility of the QCD vacuum from an effective quark-quark interaction
Hong-shi Zong, Shi Qi, Wei Chen +2
A modified method for calculating the pion vacuum susceptibility from an effective quark-quark interaction model is derived. Within this approach it is shown that the pion vacuum s…
The Tensor Current Divergence Equation in U(1) Gauge Theories is Free of Anomalies
Wei-Min Sun, Hong-Shi Zong, Xiang-Song Chen +1
The possible anomaly of the tensor current divergence equation in U(1) gauge theories is calculated by means of perturbative method. It is found that the tensor current divergence…
A Note on Transverse Axial Vector and Vector Anomalies in U(1) Gauge Theories
Wei-Min Sun, Hong-Shi Zong, Xiang-Song Chen +1
The transverse axial vector and vector anomalies in four-dimensional U(1) gauge theories studied in [10] is reexamined by means of perturbative methods. The absence of transverse a…