In this paper the EMC effect for 27Al, 56Fe, 63Cu, and 107Ag nuclei are investigated with oscillator model. In this model has been assumed that nucleons in each level are affected by different mean field, so we use pa...In this paper the EMC effect for 27Al, 56Fe, 63Cu, and 107Ag nuclei are investigated with oscillator model. In this model has been assumed that nucleons in each level are affected by different mean field, so we use parameter having relation with radius of each level. Therefore;this assumption causes that extracted data for average binding energy =-22.48MeV, =-23.79MeV, =-29.56MeV, and =-31.25MeVare considered for 27Al, 56Fe, 63Cu, and 107Ag nuclei, respectively. Achieving results have agreement with experimental data.展开更多
Using the statistical model of parton and applying the rescaling model tochoose nuclear parameters by fitting the experimental data in low-X and medium-X re-gion,the influence of EMC(European Muon Collaboration)effect...Using the statistical model of parton and applying the rescaling model tochoose nuclear parameters by fitting the experimental data in low-X and medium-X re-gion,the influence of EMC(European Muon Collaboration)effect on large-P_T directphoton production is studied.The result shows that the influence of EMC effect issmall.展开更多
A new and simple statistical approach is performed to calculate the parton distribution functions （PDFs） of the nucleon in terms of light-front kinematic variables.Analytic expressions of x-dependent PDFs are obtain...A new and simple statistical approach is performed to calculate the parton distribution functions （PDFs） of the nucleon in terms of light-front kinematic variables.Analytic expressions of x-dependent PDFs are obtained in the whole x region.And thereafter,we treat the temperature T as a parameter of the atomic number A to explain the nuclear EMC effect in the region x ∈ [0.2,0.7].We give the predictions of PDF ratios,and they are very different from those by other models,thus experiments aiming at measuring PDF ratios are suggested to provide a discrimination of different models.展开更多
文摘In this paper the EMC effect for 27Al, 56Fe, 63Cu, and 107Ag nuclei are investigated with oscillator model. In this model has been assumed that nucleons in each level are affected by different mean field, so we use parameter having relation with radius of each level. Therefore;this assumption causes that extracted data for average binding energy =-22.48MeV, =-23.79MeV, =-29.56MeV, and =-31.25MeVare considered for 27Al, 56Fe, 63Cu, and 107Ag nuclei, respectively. Achieving results have agreement with experimental data.
基金The project supported in part by the Provincial Science Foundation of Fujian,China.
文摘Using the statistical model of parton and applying the rescaling model tochoose nuclear parameters by fitting the experimental data in low-X and medium-X re-gion,the influence of EMC(European Muon Collaboration)effect on large-P_T directphoton production is studied.The result shows that the influence of EMC effect issmall.
基金Supported by National Natural Science Foundation of China (10721063,10975003)Hui-Chun Chin and Tsung-Dao Lee Chinese Undergraduate Research Endowment (Chun-Tsung Endowment) at Peking UniversityNational Fund for Fostering Talents of Basic Science (J0630311,J0730316)
文摘A new and simple statistical approach is performed to calculate the parton distribution functions （PDFs） of the nucleon in terms of light-front kinematic variables.Analytic expressions of x-dependent PDFs are obtained in the whole x region.And thereafter,we treat the temperature T as a parameter of the atomic number A to explain the nuclear EMC effect in the region x ∈ [0.2,0.7].We give the predictions of PDF ratios,and they are very different from those by other models,thus experiments aiming at measuring PDF ratios are suggested to provide a discrimination of different models.
