Comments on the Blumlein-Bottcher determination of higher twist corrections to the nucleon spin structure function g_1

TL;DR

This paper examines conflicting conclusions about higher twist effects in nucleon spin structure functions from different analyses, clarifying the reasons behind the discrepancies.

Contribution

It provides an explanation for the apparent contradiction between two recent analyses on higher twist contributions in polarized DIS data.

Findings

Identifies the source of discrepancy between the two analyses.

Clarifies the interpretation of higher twist effects in nucleon structure functions.

Abstract

In a recent analysis of the world data on polarized DIS, Blumlein and Bottcher conclude that there is no evidence for higher twist contributions, in contrast to the claim of the LSS group, who find evidence for significant higher twist effects. We explain the origin of the apparent contradiction between these results.