Number density interpretation of dihadron fragmentation functions
High Energy Physics - Phenomenology
2023-12-29 v2 High Energy Physics - Experiment
Nuclear Theory
Abstract
We present a new quantum field-theoretic definition of fully unintegrated dihadron fragmentation functions (DiFFs) as well as a generalized version for -hadron fragmentation functions. We demonstrate that this definition allows certain sum rules to be satisfied, making it consistent with a number density interpretation. Moreover, we show how our corresponding so-called extended DiFFs that enter existing phenomenological studies are number densities and also derive their evolution equations. Within this new framework, DiFFs extracted from experimental measurements will have a clear physical meaning.
Cite
@article{arxiv.2305.11995,
title = {Number density interpretation of dihadron fragmentation functions},
author = {D. Pitonyak and C. Cocuzza and A. Metz and A. Prokudin and N. Sato},
journal= {arXiv preprint arXiv:2305.11995},
year = {2023}
}
Comments
Some additional comments, clarifications, and references added; Version to appear in Physical Review Letters