Parton Interpretation and Twist-4 Parton Distributions

Abstract

Through explicit examples we show that twist-4 parton distributions have no parton interpretation in the sense that parton or partons inside a hadron can carry the momentum fraction $x$ of the hadron with $x>1$ or $x<-1$. The studied twist-4 parton distributions of collinear factoization are power-divergent for $|x|>1$. The corresponding transverse momentum dependent parton distributions have also no parton interpretation. They are finite. The implications of our results are discussed.

arXiv commentPublished version

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