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High Energy Physics - Phenomenology

arXiv:1610.09994 (hep-ph)
[Submitted on 31 Oct 2016]

Title:Do fragmentation functions in factorization theorems correctly treat non-perturbative effects?

Authors:John Collins
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Abstract:Current all-orders proofs of factorization of hard processes are made by extracting the leading power behavior of Feynman graphs, i.e., by extracting asymptotics strictly order-by-order in perturbation theory. The resulting parton densities and fragmentation functions include non-perturbative effects. I show how there are missing elements in the proofs; these are related to and exemplified by string and cluster models of hadronization. The proofs rely on large rapidity differences between different parts of graphs for the process; but in reality large rapidity gaps are filled in
Comments: 10 pages. To appear in Proceedings of QCD Evolution 2016 Workshop, May 30-June 3
Subjects: High Energy Physics - Phenomenology (hep-ph)
Cite as: arXiv:1610.09994 [hep-ph]
  (or arXiv:1610.09994v1 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.1610.09994
Journal reference: PoS(QCDEV2016)003

Submission history

From: John Collins [view email]
[v1] Mon, 31 Oct 2016 16:11:17 UTC (108 KB)
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