Self-Contained Definition of the Collins-Soper Kernel

The rapidity anomalous dimension (RAD), or Collins-Soper kernel, defines the scaling properties of transverse momentum dependent distributions and can be extracted from the experimental data. I derive a self-contained nonperturbative definition that represents RAD without reference to a particular p...

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Bibliographic Details
Published in:Physical review letters 2020-11, Vol.125 (19), p.1-192002, Article 192002
Main Author: Vladimirov, Alexey A.
Format: Article
Language:English
Subjects:
Kernels
Properties (attributes)
Transverse momentum
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Summary:The rapidity anomalous dimension (RAD), or Collins-Soper kernel, defines the scaling properties of transverse momentum dependent distributions and can be extracted from the experimental data. I derive a self-contained nonperturbative definition that represents RAD without reference to a particular process. This definition makes possible exploration of the properties of RAD by theoretical methods on one side, and the properties of QCD vacuum with collider measurements on another side. To demonstrate these possibilities, I compute the power correction to RAD, its largeb asymptotic, and compare these estimations with recent phenomenological extractions.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.125.192002