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Pomeron-Quark Coupling from Charge Conjugation Invariance

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Communications in Theoretical Physics 2006年第2X期46卷 287-290页

作者： ZHOU Li-Juan WU Qing MA Wei-Xing gu yun-ting Collaboration Group of Hadron Physics and Non-perturbative QCD Study Guangxi University of Technology Liuzhou 545006 China Department of Physics Institute for Sciences Qingdao University Qingdao 266071 China Institute of High Energy Physics the Chinese Academy of Sciences P.O. Box 918 Beijing 100049 China College of Physical Science and Engineering Technology Guangxi University Nanning 530004 China

Based on the charge conjugation invariance and the vazuum property of the Pomeron, we point out that the commonly used vector vertex of the Pomeron coupling to quarkis incorrect since it contradicts with the Pomeron property. We also claim that the soft Pomeron could be a tensor glueball ξ（2230） with quantum numbers I^GJ^PC = 0^＋2^＋＋ and total decay width Гtot ≌ 100 MeV, which lies on the soft Pomeron trajectory αp = 1.08＋ 0.20t. Therefore, the coupling vertex of the soft Pomeron to quark should be tensorial which is invariant under the charge conjugation and can explaIn why the inadequate vector coupling, γ^μ, of the soft Pomeron to quark is successful in dealing with Pomeron physics.

关键词： Pomeron quark tensor glueball Pomeron-quark coupling vertex

Upsilon Photo-Production off Proton in QCD Inspired Model

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Communications in Theoretical Physics 2009年第7期52卷 108-114页

作者： PAN Ji-Huan MA Wei-Xing gu yun-ting LUO Liang-Zi Department of Physics Guangxi University Nanning 530004 China Department of Physics and Electronic Engineering Hechi College Yizhou 546300 China Institute of High Energy Physics the Chinese Academy of Sciences Box 918 Beijing 100049 China

Based on the generalized vector meson dominance model in QCD, we study photoproduction of vector meson T off the proton by use of the QCD inspired model in which the contributions from quark-quark, gluon-gluon, and quark-gluon interference term to observable are taken into consideration. Calculations are performed for total cross section σtot, differential cross section dσ/dt, ratio of the real part to imaginary part of forward scattering amplitude ρ, and nuclear slop parameter function β. The mediators of interactions between projectiles （the quark and antiquark pair fluctuated from the real the photon） and the proton target （three-quark system） are the tensor Glueball and Odderon instead of using the usual Pomeron exchange. The theoretical predictions for σtot （s） are consistent with the experimental data within error bars of the data. The data for dσ/dt, ρ, and β are urgently needed.

关键词： Upsilon production QCD inspired model vector meson dominance model

Gasser-Leutwyler Coefficients of Chiral Lagrangian for Pseudoscalar Goldstone Bosons in Dyson-Schwinger Equations

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Communications in Theoretical Physics 2008年第11期50卷 1205-1210页

作者： gu yun-ting QIN Song-Mei ZHOU Li-Juan MA Wei-Xing Department of Physics Guangxi University Nanning 530004 China Collaboration Group of Hadron Physics and Non-perturbative QCD Study Guangxi University of Technology Liuzhou 545006 China Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China

Based on the Dyson-Schwinger equations of quark propagator in rainbow truncation with an effective gluonpropagator,the ten unknown Gasser-Leutwyler coefficients of the chiral Lagrangian for pseudoscalar Goldstone bosonsare *** predicted values of L_i with i=1,2,...,10 are in a reasonable agreement with empirical values usedwidely in literature,and the values predicted by many other theoretical models with QCD characteristics.

关键词： chiral perturbation theory Gasser-Leutwyler coefficient Dyson-Schwinger equation

Quark Mass Dependence of Nucleon Magnetic Moment and Charge Radii

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Communications in Theoretical Physics 2005年第2X期44卷 333-336页

作者： MA Wei-Xing ZHOU Li-Juan gu yun-ting PING Rong-Gang Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator of Lanzhou Lanzhou 730000 China Institute of High Energy Physics~ the Chinese Academy of Sciences Beijing 100039 China Department of Information and Computing Science Guangxi University of Technology Liuzhou 545006 China College of Physics Science and Engineering Technology Guangxi University Nanning 530004 China

Understanding hadron structure within the framework of QCD is an extremely challenging problem. Our purpose here is to explain the model-independent consequences of the approximated chiral symmetry of QCD for two famous results concerning the quark structure of the nucleon. We show that both the apparent success of the constituent quark model in reproducing the ratio of proton to neutron magnetic moments and the apparent success of the Foldy term in reproducing the observed charge radius of the neutron are coincidental. That is, a relatively small change of the current quark mass would spoil both results.

关键词： quark mass nucleon magnetic moment nucleon charge radius

Non-perturbative Aspects of QCD and Parameterized Quark Propagator

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Communications in Theoretical Physics 2008年第1期49卷 181-188页

作者： ZHOU Li-Juan gu yun-ting MA Wei-Xing MENG Cheng-Ju PAN Ji-Huan Collaboration Group of Hadron Physics and Non-perturbative QCD Study Guangxi University of Technology Liuzhou545006 China Department of Physics Guangxi University Nanning 530004 China Institute of High Energy Physics the Chinese Academy of Sciences Beijing 100049 China Department of Physics Hechi College Yizhou 546300 Guangxi China

Based on the Global Color Symmetry Model, the non-perturbative Q, CD vacuum is investigated in the parameterized fully dressed quark propagator. Our theoretical predictions for various quantities characterized the QCD vacuum are in agreement with those predicted by many other phenomenologieal QCD inspired models. The successful predictions clearly indicate the extensive validity of our parameterized quark propagator used here. A detailed discussion on the arbitrariness in determining the integration cut-off parameter ofμ in calculating QCD vacuum condensates and a good method, which avoided the dependence of calculating results on the cut-off parameter is also strongly recommended to readers.

关键词： global color symmetry model parameterized quark propagator non-perturbative QCD vacuumand vacuum condensate

φElectro-production in Pomeron Exchange Model

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Communications in Theoretical Physics 2005年第2X期44卷 329-332页

作者： MA Wei-Xing LIU Bao-Rong ZHOU Li-Juan TAN Zhen-Qiang HE Xiao-Rong gu yun-ting Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator of Lanzhou Lanzhou 730000 China Institute of High Energy Physics the Chinese Academy of Sciences P.O. Box 918 Beijing 100039 China Department of Physics Guangxi University Nanning 530004 China Department of Information and Computing Science Guangxi University of Technology Liuzhou 545006 China

Based on the Pomeron exchange model, elastic production of φ meson in electron-proton interaction is investigated with both linear and non-linear Pomeron trajectories. The numerical calculations of the differential cross section for e + p → e' + p+ φ are performed. The theoretical predictions show that the dependence of the differentialcross section on virtual photon virtuality, Q2, is of moderation, the change of the energy scale parameter so causes moderate effect on the differential cross section, and the linear trajectory is a good approximation to non-linearity of the Pomeron trajectory, in particular, at small momentum transfer region | t |≤ 0.2 GeV2.

关键词： φelectro-production Pomeron exchange model

J/ψ and φ Electro-production in Pomeron Exchange Model

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Communications in Theoretical Physics 2007年第2X期48卷 326-330页

作者： LIU Bao-Rong ZHOU Li-Juan MA Wei-Xing TAN Zhen-Qiang gu yun-ting HE Xiao-Rong Department of Physics Guangxi University Nanning 530004 China Department of Information and Computing Science Guangxi University of Technology Liuzhou 545006 China Institute of High Energy Physics The Chinese Academy of Sciences P.O. Box 918 Beijing 100039 China

Based on Pomeron exchange model, J/ψ and φ production in electro-proton interaction are investigated with both linear and non-linear Pomeron trajectory. The experimental differential cross sections measured as a function of the kinematic variable Q^2,W and t are reproduced successfully in the model. Our conclusions are that the Pomeron exchange model is a successful description of J/ψ and φ electro-productions on the proton, and that the linear trajectory is a good approximation to non-linearity of the Pomeron trajectory.

关键词： vector meson electro-production diffractive process Pomeron exchange model

Trinuclear gold-catalyzed site-selective alkylation of peptides

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Science China Chemistry 2025年第1期68卷 249-256页

作者： Qing-yun Fang Chengyihan gu Yinghan Chen Wencheng Yan Yong Liang Weipeng Li Chengjian Zhu Jie Han Jin Xie State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic Materials Chemistry and Biomedicine Innovation Center (Chem BIC) School of Chemistry and Chemical Engineering Nanjing University Green Catalysis Center College of Chemistry Zhengzhou University State Key Laboratory of Natural Medicines China Pharmaceutical University

Selective modification of peptides has always been a challenging issue. The selective alkylation of peptides can alter the biological activity and physical properties of molecules, and it has gained significant research interest. We herein disclose an intriguing gold-catalyzed alkylation of peptides using bench-stable unactivated alkyl bromides under photoredox catalysis. A wide range of structurally diverse primary, secondary and tertiary alkyl bromides serve as effective coupling partners to precisely connect with the α-C(sp3)–H in glycine residue of peptides. This protocol demonstrates an exceptionally broad scope for alkyl halides and excellent tolerance for a wide range of useful functional groups. A series of relay transformations to construct cyclic peptides, to proceed click reaction and to realize peptide fluorescence labeling further enhance its synthetic practicality. In addition, mechanistic studies and density functional theory(DFT) calculations reveal an inner-sphere and subsequent outersphere single electron transfer(SET) mechanism.

关键词： gold catalysis peptide alkylation C-C coupling radical

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Direct Photolithography of WO_(x)Nanoparticles for High‑Resolution Non‑Emissive Displays

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Nano-Micro Letters 2025年第3期17卷 297-309页

作者： Chang gu guojian Yang Wenxuan Wang Aiyan Shi Wenjuan Fang Lei Qian Xiaofei Hu ting Zhang Chaoyu Xiang Yu‑Mo Zhang Laboratory of Optoelectronic Information Technology and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201People’s Republic of China Hangzhou Bay Laboratory of Advanced Nano‑Optoelectronic Materials and Devices Qianwan Institute of CNITECHNingbo 315336People’s Republic of China Smart Materials for Architecture Research Lab Innovation Center of Yangtze River DeltaZhejiang UniversityJiaxing 314100People’s Republic of China University of Science and Technology of China Hefei 230026People’s Republic of China State Key Lab of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012People’s Republic of China

High-resolution non-emissive displays based on electrochromic tungsten oxides(WOx)are crucial for future near-eye virtual/augmented reality interactions,given their impressive attributes such as high environmental stability,ideal outdoor readability,and low energy ***,the limited intrinsic structure of inorganic materials has presented a significant challenge in achieving precise patterning/pixelation at the micron ***,we successfully developed the direct photolithography for WOx nanoparticles based on in situ photo-induced ligand *** strategy enabled us to achieve ultra-high resolution efficiently(line widthting device exhibited impressive electrochromic performance,such as fast response(3600 cycles),as well as promising applications in electronic logos,pixelated displays,flexible electronics,*** success and advancements presented here are expected to inspire and accelerate research and development(R&D)in high-resolution non-emissive displays and other ultra-fine micro-electronics.

关键词： Electrochromic Direct photolithography WOx nanoparticles In situ photo-induced ligand exchange High-resolution displays