论文部分内容阅读
指出在计算πNN过程对核子结构函数的贡献时,将反冲核子视为物理核子更为合理. 对Gottfried求和规则破坏、对质子中海夸克分布u和d不对称u(x)-d(x)等方面的贡献给出了详细的计算,与已有实验进行比较. 结果表明π介子交换不是导致这一破坏以及影响核子结构函数的效应的惟一来源.
πNN过程对Gottfried求和规则破坏的贡献
【摘 要】
：
指出在计算πNN过程对核子结构函数的贡献时,将反冲核子视为物理核子更为合理. 对Gottfried求和规则破坏、对质子中海夸克分布u和d不对称u(x)-d(x)等方面的贡献给出了详细的
【机 构】
：
济南大学理学院,中国科学院高能物理研究所
【出 处】
：
高能物理与核物理
【发表日期】
：
2004年期
【基金项目】
：
中国博士后科学基金;
其他文献
The constitutive equation of fiber suspensions is established on the basis of fiber orientation tensors. The modified Orr-Sommerfeld stability equation is obtai
Infrared synchrotron radiation spectroscopy and microspectroscopy: new tools for interdisciplinary a
Synchrotron radiation sources, whose number is steadily increasing, are undoubtedly the most powerful and brilliant sources in the X-ray range. Although the syn
研究了Mn部分替代RFe11Ti中的Fe对化合物结构和磁性的影响. 利用真空电弧熔炼和真空热处理制备RFe7Mn4Ti(R=Y, Tb, Dy, Ho和Er)化合物样品. 室温粉末样品的X射线衍射和热磁曲
Applying an analysis method to a group of multivariable equations, a new class of variational equations are proved. This method is more concise and more direct
The nonlinear predator-prey singularly perturbed Robin initial boundary value problems for reaction diffusion systems were considered. Under suitable conditions
Several nanostructures we produced by ion irradiation have been reviewed in this paper. By using ions to irradiate two ultrahigh molecular weight polyethylene t
基于信息论中最大熵原理,提出了一种新的模糊边缘检测算法.首先介绍了模糊概率、用条件概率与条件熵定义模糊划分熵的概念以及模糊划分的原理.算法利用了自然划分以及梯度图
An inherent self-heating effect of the silicon-on-insulator (SOI) devices limits their application at high current levels. In this paper a novel solution to red
An efficient algorithm for curve interpolation is proposed. The algorithm can produce a subdivision surface that can interpolate the predefined cubic B-spline c
The piezoresponse behavior dependence of the Pb(Mg1/3Nb2/3)O3-30%PbTiO3 single crystal on the vacuum degree has been investigated by scanning force microscopy i