Positivity Constraints for Spin-Dependent Parton Distributions
J. Soffer
TL;DR
New positivity constraints on the spin-dependent structure functions of the nucleon are derived and their domain of allowed values are reduced, in particular, for the chiral-odd parton distribution.
Abstract
We derive new positivity constraints on the spin-dependent structure functions of the nucleon. These model independent results reduce conside\-rably their domain of allowed values, in particular for the chiral-odd parton distribution $h_1 (x)$.