Polarized nucleon structure functions within a chiral soliton model

Journal Article · Sun Jun 01 04:00:00 EDT 1997 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.55.6910· OSTI ID:503795

Weigel, H; Gamberg, L; Reinhardt, H ^[1]

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1. Institute for Theoretical Physics, Tuebingen University, Auf der Morgenstelle 14, D-72076 Tuebingen (Germany)

We study polarized-spin structure functions of the nucleon within the bosonized Nambu{endash}Jona-Lasinio model where the nucleon emerges as a chiral soliton. We present the electromagnetic polarized structure functions g{sub 1}(x) and g{sub 2}(x) for ep scattering and discuss various sum rules in the valence quark approximation. This approximation is justified because in this model axial properties of the nucleon are dominated by their valence quark contributions. We find that these structure functions are well localized in the interval 0{le}x{le}1. We compare the model predictions on the polarized structure functions with data from the E143 experiment by evolving them from the scale characteristic of the NJL model to the scale of the data. Additionally, a comparison is made with parametrized data at a momentum scale commensurate with the model calculation. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 503795
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 11 Vol. 55; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CHIRAL SYMMETRY
ELECTRON-PROTON INTERACTIONS
NUCLEONS
POLARIZATION
SOLITONS
STRUCTURE FUNCTIONS