Having studied the initial state energy loss versus nuclear shadowing for the Drell-Yan dimuon pairproduction in the color string model,the inhomogeneous shadowing effect is considered in this paper.We find thatthe in...Having studied the initial state energy loss versus nuclear shadowing for the Drell-Yan dimuon pairproduction in the color string model,the inhomogeneous shadowing effect is considered in this paper.We find thatthe inhomogeneous shadowing effect does amend the rate of energy loss per unit path length,-dE/dz.Finally,thetheoretical results for the Drell-Yan differential cross-section ratios are compared with the E772 and E866 data.It isfound that the theoretical results are in good agreement with the experimental data.展开更多
We discuss the consequence of local duality for elastic scattering, and derive a model-independent equation between structure functions at x ～ 1 and elastic electromagnetic form factors. Then the electromagnetic form...We discuss the consequence of local duality for elastic scattering, and derive a model-independent equation between structure functions at x ～ 1 and elastic electromagnetic form factors. Then the electromagnetic form factors of proton are discussed using the quark-hadron duality theory. We also debate the form factor of proton in a bound state.It may be an effective approach to study the form factor of proton in media.展开更多
Based on the detailed configuration accounting model(DCA),a method is developed to calculate the rate of the resonant photoionization(RP)in the average atom(AA)model.Using this method,the RP rates are calculated for a...Based on the detailed configuration accounting model(DCA),a method is developed to calculate the rate of the resonant photoionization(RP)in the average atom(AA)model.Using this method,the RP rates are calculated for an average ion and compared with DCA calculation.The comparison shows the reasonableness of the proposed method.The RP process is included in the AA rate equations and the numerical results show that RP can cause an additional ionization up to 10%or so in some cases.展开更多
基金the Innovation Foundation of the Academy of Armored Forces Engineering of PLA under Grant 20062L10
文摘Having studied the initial state energy loss versus nuclear shadowing for the Drell-Yan dimuon pairproduction in the color string model,the inhomogeneous shadowing effect is considered in this paper.We find thatthe inhomogeneous shadowing effect does amend the rate of energy loss per unit path length,-dE/dz.Finally,thetheoretical results for the Drell-Yan differential cross-section ratios are compared with the E772 and E866 data.It isfound that the theoretical results are in good agreement with the experimental data.
文摘We discuss the consequence of local duality for elastic scattering, and derive a model-independent equation between structure functions at x ～ 1 and elastic electromagnetic form factors. Then the electromagnetic form factors of proton are discussed using the quark-hadron duality theory. We also debate the form factor of proton in a bound state.It may be an effective approach to study the form factor of proton in media.
基金Supported by the Science and Technology Funds of China Academy of Engineering Physics(990221).
文摘Based on the detailed configuration accounting model(DCA),a method is developed to calculate the rate of the resonant photoionization(RP)in the average atom(AA)model.Using this method,the RP rates are calculated for an average ion and compared with DCA calculation.The comparison shows the reasonableness of the proposed method.The RP process is included in the AA rate equations and the numerical results show that RP can cause an additional ionization up to 10%or so in some cases.
