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Strange Meson Photo-production and Its Associated Radiative Capture on Proton in Low-Energy QCD Lagrangian

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Communications in Theoretical Physics 2006年第3X期46卷 493-500页

作者： ZHOU Li-Juan ma wei-xing Collaboration Group of Hadron Physics and Non-perturbative QCD Study Guangxi University of Technology Liuzhou 545006 China Institute of High Energy Physics the Chinese Academy of Sciences P.O. Box 918 Beijing 100049 China

Based on the low energy QCD Lagrangian theory and the crossing symmetry relation, strange meson photoproduction and its associated radiative capture on the proton are investigated in the [SUSF（6） × O（3）]sym . × SUc（3） quark mode/of baryon structure with only one same input parameter, the only strong coupling constant aM. Calculations for the cross sections, p-polarization of γ ＋ P → K^＋＋ A reaction and the branching ratios for K^- radiative capture of K^- ＋ p →　γ ＋ Y with Y = A, ∑^0 are performed. Good agreements to data are obtained and the results show that, compared to traditional phenomenological models, the low energy QCD Lagrangian theory provides a successful, unifled description of the strange meson photo-production and its associated radiative capture.

关键词： low-energy QCD Lagrangian quarks and gluons quark structure of baryon strange meson photoproduction K^- meson radiative capture

Pion Decay Constant and masses of Light Quarks and In-medium Goldstone Bosons

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Communications in Theoretical Physics 2006年第6期45卷 1085-1088页

Based on the fully dressed confining quark propagator, the pion decay constant fπ, local quark vacuum condensate, and the masses of light quarks and in-medlum Goldstone bosons are investigated. The pion decay constant fπ is predicted and compared with its value of experimental measurement. A great agreement is obtained. With the predicted fπ and values of Goldstone boson masses measured by experiments in free configuration the current masses of light quarks and the masses of in-medium Goldstone bosons are obtained.

关键词： pion decay constant quark propagator current mass of light quark masses of in-medium Goldstone bosons

^-pp and pp Elastic Scattering at High Energies

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Communications in Theoretical Physics 2007年第3X期48卷 541-544页

Based on the eikonalized Glauber representation of hadron-hadron scattering, we study the diffractive processes of ^-pp and pp elastic scattering at high energies. From our theoretical calculations and fits to the corresponding experimental data at high energies and all available momentum transfer, we find that the Pomeron exchange contributions play a significant role in description of differential cross section dσ/dt in the whole experimental domain. The Pomeron exchange contributions are related to multi-gluon exchanges in QCD, which are color singlet bound state of Reggeized gluons, such as tensor glueball and Odderon. Accordingly, we may claim that the ^-pp and pp diffractive processes at high energies s and moderate momentum transfer t would be a good tool to verify the existence of the color singlet multigluon bound states and to test QCD since QCD theory does predict the existence of these states. Therefore, we believe that the experimental measurement should be done for these diffractive processes.

关键词： pp and ^-pp scattering eikonalized Glauber model Reggeon and Pomeron exchanges

Quark Gluon Condensate, Virtuality and Susceptibility of QCD Vacuum

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Communications in Theoretical Physics 2008年第7期50卷 161-174页

作者： ZHOU Li-Juan WU Qing ma wei-xing Collaboration Group of Hadron Physics and Non-perturbative QCD Study Guangxi University of Technology Liuzhou 545006 China Department of Physics College of Science Qingdao University Qingdao 266071 China Institute of High Energy Physics the Chinese Academy of Sciences P.O. Box 918 Beijing 100049 China

We study vacuum of QCD in this *** structure of non-local quark vacuum condensate,values ofvarious local quark and gluon vacuum condensates,quark-gluon mixed vacuum condensate,quark and gluon virtualityin QCD vacuum state,quark dynamical mass and susceptibility of QCD vacuum state to external field are predicted byuse of the solutions of Dyson Schwinger equations in'rainbow'approximation with a modeling gluon propagator andthree different sets of quark-quark interaction *** theoretical predictions are in good agreement with thecorrespondent empirical values used widely in literature,and many other theoretical *** quark propagatorand self-energy functions are also obtained from the numerical solutions of Dyson-Schwinger *** work iscentrally important for studying non-perturbative QCD,and has many important applications both in particle andnuclear physics.

关键词： QCD vacuum condensates susceptibility of QCD vacuum QCD

High Energy ^-pp and pp Elastic Scatterings in QCD Inspired Model

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Communications in Theoretical Physics 2007年第4期47卷 715-718页

作者： LU Juan ma wei-xing HE Xiao-Rong Collaboration Group of Hadron Physics and Non-perturbative QCD Study Guangxi University of Technology Liuzhou 545006 China Institute of Physics Science and Engineering Technology Guangxi University Nanning 530004 China Institute of High Energy Physics the Chinese Academy of Sciences Beijing 100049 China

We propose QCD inspired model to calculate ^-pp and pp elastic scatterings at high energies in this paper. A calculation for total cross section of ^-pp and pp is performed in which the contributions from gluon-gluon, quark-quark, and gluon-quark interactions are included. Our results show that the QCD inspired model gives a perfect fit to experimental data of total cross section both for ^-pp and pp elastic scatterings at the whole energy region where experimental data existed at FNAL and CERN.

关键词： QCD inspired model eikonal profile function high-energy elastic scattering

Nuclear Slope Parameter of pp and p Elastic Scattering in QCD Inspired Model

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Communications in Theoretical Physics 2008年第2期49卷 456-460页

作者： LU Juan ma wei-xing HE Xiao-Rong Collaboration Group of Hadron Physics and Non-perturbative QCD Study Guangxi University of Technology Liuzhou 545006 China Department of Physics Guangxi University Nanning 530004 China Institute of High Energy Physics the Chinese Academy of Sciences P.O. Box 918 Beijing 100049 China

Based on the quark-gluon structure of nucleon and the possible existence of Odderon in strong interaction process due to gluon self-interaction, the elastic scatterings of pp and p^-p at high energies are studied. The contributions from individual terms of quark-quark, gluon-gluon interactions, quark-gluon interference, and the Odderon terms to the nuclear slope parameter B（s） are analyzed. Our results show that the QCD inspired model gives a good fit to the LHC experimental data of the nuclear slope parameter.

关键词： nuclear slope parameter QCD inspired model Odderon

Ratio of Real to Imaginary for pp and pp Elastic Scatterings in QCD Inspired Model

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Communications in Theoretical Physics 2007年第3期47卷 550-554页

We use the QCD inspired model to analyze the ratio of the real to the imaginary for pp and pp elastic scatterings. A calculation for the ratio of the real to the imaginary is performed in which the contributions from gluongluon interaction, quark-quark interaction, quark-gluon interaction, and odd eikonal profile function are included. Our results show that the QCD inspired model gives a good fit to the LHC experimental data.

关键词： QCD inspired model eikonal profile function ratio of real to imaginary

Dynamical Running mass of Quark in the Dyson-Schwinger Equation Approach

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Communications in Theoretical Physics 2002年第5期38卷 571-576页

作者： ma wei-xing SHEN Peng-Nian ZHOU Li-Juan Institute of High Energy Physics the Chinese Academy of Sciences Beijing 100039 China Institute of Theoretical Physics the Chinese Academy of Sciences Beijing 100080 China Department of Information and Computing Science Guangxi University of Technology Liuzhou 545006 China Institute of High Energy Physics the Chinese Academy of Sciences Beijing 100039 China Institute of Theoretical Physics the Chinese Academy of Sciences Beijing 100080 China Department of Information and Computing Science Guangxi University of Technology Liuzhou 545006 China

Based on the Dyson-Schwinger equations of QCD in the "rainbow" approximation, the fully dressed quarkpropagator Sf(p) is investigated, and then an algebraic parametrization form of the propagator is obtained as a solutionof the equations. The dressed quark amplitudes Af and Bf built up the fully dressed quark propagator and the dynamicalrunning masses Mf defined by Af and Bf for light quarks u, d and s are calculated, respectively. Using the predictedrunning masses Mf, quark condensates = -(0.255 GeV)a for u, d quarks, and = 0.8masses of Goldstone bosons K, π, and η are alsoevaluated. The numerical results show that the masses of quarks are dependent on their momentum p2. The fully dressedquark amplitudes Af and Bf have correct behaviors which can be used for many purposes in our future researches onnonperturbative QCD.

关键词： Dyson-Schwinger equations, quark propagator, quark mass, the masses of Goldstone bosons

Searching for Odderon with ^-pp and pp Elastic Scattering at High Energies

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Communications in Theoretical Physics 2007年第3X期48卷 519-524页

作者： ZHOU Li-Juan LIU Bao-Rong ma wei-xing Collaboration Group of Hadron Physics and Non-perturbative QCD Study Guangxi University of Technology Liuzhou 545006 China Department of Physics Guangxi University Nanning 530004 China Institute of High Energy Physics the Chinese Academy of Sciences Beijing 100049 China

Based on the assumption that the Pomeron is a sum of Regge multipoles, each of which corresponds to a finite gluon ladder, we suggest a way to search the Odderon by studying the diffractive processes of ^-pp and pp elastic scattering. From our theoretical calculations and fits to the corresponding experimental data at high energies and all available momentum transfer, we find that the Odderon plays a significant role in the description of differential cross section dσ/ dt in the whole experimental domain. Accordingly, we can claim that the ^-pp and pp diffractive processes at high energies s and moderate momentum transfer t could be a good tool to search for Odderon and to test QCD since the processes are purely non-perturbative QCD phenomena. Therefore, the experimental measurements are urgently demanded.

关键词： Odderon diffractive processes non-perturbative QCD