Document Type

Article

Publication Date

2025

DOI

10.31349/RevMexFis.71.030201

Publication Title

Revista Mexicana de Física

Volume

71

Issue

3

Pages

030201

Abstract

In this letter, we reassess the underlying physics of the number sum rule for dihadron fragmentation functions. We will argue that, currently, there are no settled constraints on what constitutes a valid number density interpretation for multihadron fragmentation functions. Imposing overly restrictive criteria might lead to misinterpretating the data. Most importantly, and on the basis of phenomenological analyses, the slightly varying definitions used in previous work are not excluded from possessing legitimate number density interpretations (up to the usual issues with ultraviolet divergences and renormalization), so long as they are paired with appropriate factorization theorems. We advocate for further theoretical analyses to be challenged with experimental data, available at JLab or at the future EIC.

Rights

© 2025 T. Rogers, A. Courtoy.

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) License.

Original Publication Citation

Rogers, T., & Courtoy, A. (2025). Avenues for a number density interpretation of dihadron fragmentation functions. Revista Mexicana de Física, 71(3), 1-3, Article 030201. https://doi.org/10.31349/RevMexFis.71.030201

ORCID

0000-0002-0762-0275 (Rogers)

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