QCD Predictions for Spin Dependence of Parton Distributions  

作　　者：S.AtashbarTehrani AliN.Khorramian A.Mirjalili 

机构地区：[1]PhysicsDepartment,PersianGulfUniversity,Boushehr,Iran／／InstituteforStudiesinTheoreticalPhysicsandMathematics（IPM）,P.O.Box19395-5531,Tehran,Iran [2]PhysicsDepartment,SemnanUniversity,Semnan,Iran／／InstituteforStudiesinTheoreticalPhysicsandMathematics（IPM）,P.O.Box19395-5531,Tehran,Iran [3]physicsDepartment,YazdUniversity,Yazd,Iran／／InstituteforStudiesinTheoreticalPhysicsandMathematics（IPM）,P.O.Box19395-5531,Tehran,Iran

出　　处：《Communications in Theoretical Physics》2005年第6期1087-1098,共12页理论物理通讯（英文版）

摘　　要：We introduce the polarized valon distributions to describe the spin dependence of parton distributions.The polarized valon distributions in the proton and polarized parton distributions inside the valon can help to obtain polarized parton distribution in a proton. In order to be able to obtain the spin contribution of sea quarks, we need to improve the valon model We employ the Bernstein polynomial averages to obtain the unknown parameters which exist in our calculations. Our results for the polarized proton structure function, xg1p, are in good agreement with the experimental data for some values of Q2.

关 键 词：valon model parton distribution function moment of structure function bernstein polynomial spin contribution 

分 类 号：O413.3[理学—理论物理]