The Production Of Vector Meson In Ultra-peripheral Collisions

Theory can give well interpretation in the large PT vector meson production exper-imental data in the ultrarelativistic heavy ion collisions,however,there are lots of issue can not be interpreted in the low pT region.In this thesis,based on the framework of the Color Glass Condensates(CGC),we investigate the production of vector meson in the ultra-peripheral collisions.In the framework of the CGC,the gluon density increase rapidly with the increase energy and the decrease of x,the gluon density with transverse momentum less than the saturation momentum Qs will reach a state of saturation.Fur-thermore,taking into account the condition of high energy,hadron can be regarded as an object consisting of pointlike and quasi-free partons in the parton model,the protons with speed close to the light,the partons with charged will radiate photons,then the photons interact with the another target particle.Based on this model,we calculate the the pro-duction of vector meson in the ultra-peripheral pp(proton-proton)collisions at the Large Hadron Collider energy region within different scattering model and vector meson wave function model,and compared with the equivalent photon approximation method.The result shows the process of the radiate photons by charged parton within proton have a large contribution to the production of vector meson,can reach the same order of magni-tude with equivalent photon approximation method,it can not be neglect.