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Deep-Inelastic Spin and Flavor Asymmetry of the Nucleon From a QCD-Inspired Quark Model

Z. Dziembowski
C. Martoff
P. Zyla
Journal / Anthology

Physical Review D
Year: 1994
Volume: 50
Issue: 9
Page range: 5613-5626

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 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.

*Science > Physics > Nuclear and Particle Physics
*Science > Physics > Quantum Physics