Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-12-11
Phys.Rev. D64 (2001) 014013
Physics
High Energy Physics
High Energy Physics - Phenomenology
16 pages, LaTex, Table and Appendix added
Scientific paper
10.1103/PhysRevD.64.014013
The implications of one gluon exchange generated configuration mixing in the Chiral Quark Model ($\chi$QM$_{gcm}$) with SU(3) and axial U(1) symmetry breakings are discussed in the context of proton flavor and spin structure as well as the hyperon $\beta$-decay parameters. We find that $\chi$QM$_{gcm}$ with SU(3) symmetry breaking is able to give a satisfactory unified fit for spin and quark distribution functions, with the symmetry breaking parameters $\alpha=.4$, $\beta=.7$ and the mixing angle $\phi=20^o$, both for NMC and the most recent E866 data. In particular, the agreement with data, in the case of $G_A/G_V, \Delta_8$, F, D, $f_s$ and $f_3/f_8$, is quite striking.
Dahiya Harleen
Gupta Manmohan
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