Chiral Symmetry and the Nucleon Spin Structure Functions

Details Chiral Symmetry and the Nucleon Spin Structure Functions Chiral Symmetry and the Nucleon Spin Structure Functions

1998-09-18

arxiv.org/abs/hep-ph/9809443v1

Phys.Rev.D60:034020,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

46pages, LaTeX, 16 Postscript figures

Scientific paper

10.1103/PhysRevD.60.034020

We carry out a systematic investigation of twist-two spin dependent structure functions of the nucleon within the framework of the chiral quark soliton model (CQSM) by paying special attention to the role of chiral symmetry of QCD. The importance of chiral symmetry is illustrated through the good reproduction of the recent SLAC data for the neutron spin structure function $g_1^n (x,Q^2)$. We also observe substantial difference between the predictions of the longitudinally polarized distribution functions and those of the transversity distribution functions. That the chiral symmetry may be responsible for this difference is seen in the isospin dependence of the corresponding first moments, i.e. the axial and tensor charges. The CQSM predicts $g_A^{(0)} / g_A^{(3)} \simeq 0.25$ for the ratio of the isoscalar to isovector axial charges, while $g_T^{(0)} / g_T^{(3)} \simeq 0.46$ for the ratio of the isoscalar to isovector tensor charges, which should be compared with the prediction $g_A^{(0)} / g_A^{(3)} = g_T^{(0)} / g_T^{(3)} = 3 / 5$ of the constituent quark model or of the naive MIT bag model without proper account of chiral symmetry. Another prominent prediction of the CQSM is the opposite polarization of the $\bar{u}$ and $\bar{d}$ antiquarks, thereby indicating the SU(2) asymmetric sea quark (spin) polarization in the nucleon.

Affiliated with

Also associated with

No associations

Rating

Chiral Symmetry and the Nucleon Spin Structure Functions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Chiral Symmetry and the Nucleon Spin Structure Functions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chiral Symmetry and the Nucleon Spin Structure Functions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-458335