On Combining High and Low Q**2 Information on the Polarized Parton Densities

TL;DR

This paper discusses the challenges of integrating high-Q^2 deep inelastic scattering data with low-Q^2 hyperon decay data to better understand polarized parton densities, emphasizing the role of specific factorization schemes.

Contribution

It highlights issues in combining different Q^2 regimes and advocates for using particular factorization schemes to analyze polarized parton densities effectively.

Findings

Identifies problems in combining high and low Q^2 data

Explains the advantages of JET and AB schemes

Provides insights into polarized parton density determination

Abstract

We draw attention to some problems in the combined use of high-Q^2 deep inelastic scattering (DIS) data and low-Q^2 hyperon \beta-decay data in the determination of the polarized parton densities. We explain why factorization schemes like the JET or AB schemes are the simplest in which to study the implications of the DIS parton densities for the physics of the low-Q^2 region.