DEEP-INELASTIC SPIN AND FLAVOR ASYMMETRY OF THE NUCLEON FROM A QCD-INSPIRED QUARK-MODEL

被引：27

作者：

DZIEMBOWSKI, Z

MARTOFF, CJ

ZYLA, P

机构：

[1] Department of Physics, Temple University, Philadelphia

来源：

PHYSICAL REVIEW D | 1994年 / 50卷 / 09期

关键词：

D O I：

10.1103/PhysRevD.50.5613

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A systematic procedure is described which permits the structure functions of nucleons to be calculated from a nonrelativistic constituent quark model. Transformation from the nucleon rest frame to the light cone or infinite momentum frame is accomplished based on work of Susskind, which does not require the weak binding and nonrelativistic kinematical approximations used in previous work. The light-cone distribution functions so obtained are then subjected to QCD evolution, giving predictions for the quark momentum densities. The model incorporates SU(6) breaking by the QCD-inspired one gluon exchange potential originated by De Rujula, Georgi, and Glashow, with the parameters fixed by Isgur and Karl from the N-Delta mass splitting. In contrast with some previous work, the parameter values which fit the baryon mass spectrum are here shown to also give rather good agreement with the deep-inelastic flavor and spin asymmetries in the Valence region.

引用

页码：5613 / 5626

页数：14

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