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Nucleon and pion PDFs: large-x asymptotics meets functional mimicry

by Aurore Courtoy, Pavel M. Nadolsky

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Submission summary

Authors (as registered SciPost users): Aurore Courtoy
Submission information
Preprint Link:  (pdf)
Date accepted: 2022-05-06
Date submitted: 2021-08-10 13:52
Submitted by: Courtoy, Aurore
Submitted to: SciPost Physics Proceedings
Proceedings issue: 28th Annual Workshop on Deep-Inelastic Scattering (DIS) and Related Subjects (DIS2021)
Ontological classification
Academic field: Physics
  • High-Energy Physics - Phenomenology
Approach: Phenomenological


We review strategies to unveil the primordial large-$x$ structure of the nucleons as well as the pion from hard-scattering experiments. Ideas are presented for learning about the $x\to 1$ limit of nonperturbative QCD dynamics at energy scales of order 1 GeV from collider experiments at much higher scales. The behavior of parton distributions at $x\to 1$ predicted by the quark counting rules and other low-energy theoretical approaches is contrasted with phenomenological PDFs. Polynomial mimicry of PDF parametrizations is one of many factors that influence the apparent power of the $(1-x)$ falloff. We discuss implications of the mimicry for the large-$x$ falloff of the pion PDFs.

Published as SciPost Phys. Proc. 8, 063 (2022)

Reports on this Submission

Anonymous Report 1 on 2022-3-1 (Invited Report)


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