Space-time properties of the higher twist amplitudes
Wei Zhu, Hongwei Xiong, Jianhong Ruan
TL;DR
This paper presents a consistent QCD-based approach to describe twist-4 corrections in hadron structure functions, using time-ordered perturbation theory to naturally eliminate collinear singularities.
Contribution
It introduces a novel method employing time-ordered perturbation theory to analyze higher twist amplitudes in a more intuitive and consistent manner.
Findings
Effective elimination of collinear singularities
Identification of special propagators with backward propagators
Enhanced understanding of twist-4 corrections
Abstract
A consistent and intuitive description of the twist-4 corrections to the hadron structure functions is presented in a QCD-improved parton model using time-ordered perturbative theory, where the collinear singularities are naturally eliminated. We identify the special propagators with the backward propagators of partons in time order.
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