Research On The LHC Supersymmetric Particles Through Two-photon Collider Collision

The Standard Model(SM) is one of the most outstanding achievements of physics in the20th century. Its particle spectrometer includes six leptons and six quarks as its particle contents. As the most successful theory, further precision test of this model naturally has always been the main hot and important subject of the current study in high energy physics.The SM is based on spontaneously symmetry breaking and higgs mechanism and contains many open ques-tions. Theroeforec, It has to be extended to accormodate these problems. As the most simple supersymmetric extensions, the Minimal Supersymmetric Standard Model(MSSM) has become one of the most attractive such models. MSSM predicts that new physics beyond the SM must appear below1TeV.The Large Hadron collider(LHC) located at the CERN, started up completely and surpassed the Tevatron to become the hadron collider with the highest energy in the world. LHC has four main detectors, among of which ATLAS and CMS are both large and multi-purpose. They installed an auxiliary equipment called the Very Forward Detector(VFD), which locates the spot with the distance100m-400m away from the interaction point, very close to the beam pipe. It is possible to research the processes resulting from the high energy photon-photon collision at the LHC for the addition of this equipment.In this paper, the productions of the supersymmetric particles at the LHC via two photon collisions is studied in the Equivalent Photon Approximation(EPA). The results show that:the discovery of supersymmetric particles via two-photon interactions at the LHC is a priori difficult due to low production rates. Nevertheless, the very clean final states and the possible rejection of strong background might be used for detection of pairs of light SUSY particles. For example, the pair production of supersymmetric leptons, in general, induces the appearance of two leptons with identical flavor. By selecting the same flavor leptons,it could decrease the irreducible background arose by WW by a factor of two, however, it will not affect the efficiency of the signal selection.