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Vector Susceptibility of QCD Vacuum from an Effective Quark-Quark Interaction

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Communications in Theoretical Physics 2003年第6X期40卷 675-680页

作者： zonghong-shi QIshi CHENWei WUXiao-Hua DepartmentofPhysics NanjingUniversityNanjing210093China CCAST(WorldLaboratory) P.O.Box8730Beijing100080China DepartmentofPhysics SichuanUniversityChengdu610064China

.A new approach for calculating vacuum susceptibilities from an effective quark-quark interaction model is derived. As a special case, the vector vacuum susceptibility is calculated. A comparison with the results of t... 详细信息

关键词： QCD真空矢量真空磁化率球形色对称模型夸克-夸克相互作用模型量子色动力学

Small Current Quark Mass Effects on Dressed-Quark Propagator in an Effective Quark-Quark Interaction Model

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Communications in Theoretical Physics 2003年第2期39卷 205-208页

作者： zonghong－shi WUXiao－Hua 等 DepartmentofPhysics NanjingUniversityNanjing210093China CCAST（Worldlaboratory） P.O.Box8730Beijing100080China；CCAST（WolrdLaboratory）P.O.Box8730Beijing100080China DepartmentofPhysi

A method for obtaining the small current quark mass dependence of the dressed quark propagator from an effective quark-quark interaction model is developed. Within this approach the small current quark mass effects on... 详细信息

关键词： small current quark mass GCM dynamical chiral symmetry breaking

Calculation of Some Properties of Vacuum and π，σ Mesons in the Global Color Symmetry Model

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Communications in Theoretical Physics 2001年第2期36卷 187-194页

作者： zonghong－shi LIUYu－Xin 等 DepartmentofPhysics NanjingUniversityNanjing210093China InstituteofTheoreticalPhysics AcademiaSinic

Based on the quark propagator derived in the instanton dilute liquid approximation, the quark condensate susceptibilities have been calculated at the mean-field level in a nonperturbative QCD model. The numerical results are compatible with the values obtained within other nonperturbative approaches. The calculated masses and decay constants of π and σ mesons are close to the experimental values. These results show that the instanton medium might be a good approximation of the QCD vacuum.

关键词：高能物理真空性质 πσ介子整体色对称模型

Susceptibilities of QCD Vacuum from Renormalized Dyson-Schwinger Equations]

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Communications in Theoretical Physics 2004年第6期41卷 917-920页

作者： CHENWei QIshi SUNWei-Min zonghong-shi DepartmentofPhysics NanjingUniversityNanjing210093China CCAST（WorldLaboratory） P.O.Box8730Beijing100080China

The pion and tensor vacuum susceptibilities are calculated in the framework of the renormalizable DysonSchwinger equations. A comparison with the results of other nonperturbative QCD approaches is given.

关键词： QCD vacuum vacuum susceptibility Dyson-Schwinger equations

Optical Test of Local Hidden—Variable Model

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Communications in Theoretical Physics 2001年第6期35卷 679-681页

作者： WUXiao－Hua zonghong－shi 等 DepartmentofPhysicsandCenterforTheoreticalPhysics NanjingUniversityNanjing210093China DepartmentofP

An inequality is deduced from local realism and a supplementary assumption. This inequality defines an experiment that can be actually performed with the present technology to test local hidden-variable models, and it is violated by quantum mechanics with a factor 1.92, while it can be simplified into a form where just two measurements are required.

关键词： local hidden variable optical test

Chemical Potential Dependence of the Dressed-Quark Propagator in a Simple Confining QCD Model

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Chinese Physics Letters 2004年第7期21卷 1232-1235页

作者： zonghong-shi HOUFeng-Yao CHENXiang-Song LIUYu-Xin DepartmentofPhysics NanjingUniversityNanjing210093 DepartmentofPhysics SichuanUniversityChengdu610064 DepartmentofPhysics PekingUniversityBeijing100871

Based on the Dyson–Schwinger approach, a method for obtaining the chemical potential dependence of the dressed quark propagator in the `Nambu–Goldstone' and the `Wigner' phase is developed. The bag constant in the p... 详细信息

关键词： Chemical potential

Nonperturbative Aspects of Axial Vector Vertex

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Communications in Theoretical Physics 2002年第4期37卷 461-464页

作者： zonghong－shi CHANGChao－Hsi 等 DepartmentofPhysics NanjingUniversityNanjing210093China CCAST（WorldLaboratory） P.O.Box8730Beijing100080China

It is shown how the axial vector current of current quarks is related to that of constituent quarks within the framework of the global color symmetry *** dressing of the axial vector vertex and the quark self-energy functions are described by the inhomogeneous Bethe-Salpeter equation in the ladder approximation and the Schwinger Dyson equation in the rainbow approximation,respectively.

关键词： nonperturbative QCD constituent quark spontaneous chiral symmetry breaking

Pion Susceptibilities of the Vacuum in a Modified Global Colur Symmetry Model

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Communications in Theoretical Physics 2001年第4期35卷 451-454页

作者： zonghong－shi WuXiao－Hua 等 DepartmentofPhysics NanjingUniversityNanjing210093China；InstituteofTheoreticalPhysicsAcademiaSinicaP.O.Box2735Beijing100080China DepartmentofPhysics SIchuanUniversityChengdu6100

Based on a modified version of the global color symmetry model,the pion susceptibilities of vacuum needed in the QCD sum rule external-field method for the coupling of pseudoscalar current to hadron have bean calculat... 详细信息

关键词： nonperturbative QCD GCM pion susceptibility

Critical Mass of Gauge Boson in Rainbow QED3

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Communications in Theoretical Physics 2005年第3期43卷 501-503页

作者： FENGHong-Tao HUFei SUNWei-Min zonghong-shi DepartmentofPhysics NanjingUniversityNanjing210093China DepartmentofPhysics NanjingUniversityNanjing210093China／／CenterforParticleNuclearAstrophysicsNanjingUniversityNanjing210093China DepartmentofPhysics NanjingUniversityNanjing210093China／／CenterforParticleNuclearAstrophysicsNanjingUniversityNanjing210093China／／CCAST（WorldLaboratory）P.O.Box8730Beijing100080China

In three-dimensional quantum electrodynamics (QED3) with a massive gauge boson, we investigate the coupled Dyson-Schwinger equations for the fermion and photon propagators in the rainbow approximation, and obtain the critical gauge boson mass for various numbers of the fermion flavors. A comparision with the previous results is presented.

关键词： QED_3 dynamical chiral symmetry breaking critical gauge boson mass