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A model for $F_L$ structure function at low values of $Q^2$ and $x$ - revisited

by Barbara Badelek, Anna Stasto

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Submission summary

Authors (as registered SciPost users): Anna Stasto
Submission information
Preprint Link: scipost_202107_00101v2  (pdf)
Date accepted: 2021-09-02
Date submitted: 2021-08-26 16:10
Submitted by: Stasto, Anna
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


A reanalysis of the model for the longitudinal structure function $F_L (x,Q^2)$ at low $x$ and low $Q^2$ was undertaken, in view of the advent of the EIC. The model includes the kinematic constraint $F_L\sim Q^4$ as $Q^2\rightarrow$ 0. It is based on the photon-gluon fusion mechanism suitably extrapolated to the region of low $Q^2$. Revised model was critically updated, extended to the EIC kinematic region, and e.g. contains new parameterisations of the parton distribution functions.

Author comments upon resubmission

Thank you for the comments and reading of the manuscript. We have addressed the
question and resolved the problem with the figure caption for fig.2.

List of changes

Fig. 2 caption has been updated

Published as SciPost Phys. Proc. 8, 082 (2022)

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