Vector Meson Electro-production in Pomeron Exchange Model  

作　　者：MAWei-Xing LIUBao-Rong ZHOULi-Juan TANZhen-Qiang HEXiao-Rong GUYun-Ting 

机构地区：[1]CenterofTheoreticalNuclearPhysics,NationalLaboratoryofHeavyIonAcceleratorofLanzhou,Lanzhou730000,China／／InstituteofHighEnergyPhysics,theChineseAcademyofSciences,Beijing100049,China [2]DepartmentofPhysics,GuangxiUniversity,Nanning530004,China [3]DepartmentofInformationandComputingScience,GuangxiUniversityofTechnology,Liuzhou545006,China4DepartmentofPhysics，GuangxiUniversity，Nanning530004，China

出　　处：《Communications in Theoretical Physics》2005年第6期1068-1074,共7页理论物理通讯（英文版）

基　　金：国家自然科学基金，广西自然科学基金

摘　　要：Based on Pomeron exchange model, elastic production of vector meson in electro-proton interaction is investigated with both linear and non-linear Pomeron trajectory. A numerical calculation for J/psi production is performed. The effect of the energy scale so and photon virtuality Q(2) on differential cross section are also predicted. A good agreement with experimental data is obtained. Our conclusions are that the Pomeron exchange model is a successful description of J/psi electro-production, the dependence of the differential cross sections on Q2 is negligible, the linear trajectory is a good approximation to non-linearity of the Pomeron trajectory, and the value of the energy scale parameter so is dependent on the momentum transfer, namely its effect is moderate at low momentum transfer but it causes no difference at high momentum transfer vertical bar t vertical bar >= 1.25 GeV2.

关 键 词：vector meson electro-production diffractive process Pomeron exchange model 

分 类 号：O572.2[理学—粒子物理与原子核物理]