The construction of gauge-links in arbitrary hard processes

C.J. Bomhof; P.J.G. Mulders; F. Pijlman

doi:10.1140/epjc/s2006-02554-2

The construction of gauge-links in arbitrary hard processes

C.J. Bomhof, P.J.G. Mulders, F. Pijlman

Research output: Contribution to Journal › Article › Academic › peer-review

Abstract

Transverse momentum dependent parton distribution and fragmentation functions are described by hadronic matrix elements of bilocal products of field operators off the light-cone. These bilocal products contain gauge-links, as required by gauge-invariance. The gauge-links are path-ordered exponentials connecting the field operators along a certain integration path. This integration path is process-dependent, depending specifically on the short-distance partonic subprocess. In this paper we present the technical details needed in the calculation of the gauge-links, and a calculational scheme is provided to obtain the gauge invariant distribution and fragmentation correlators corresponding to a given partonic subprocess.

Original language	English
Pages (from-to)	147-162
Journal	European Physical Journal C. Particles and Fields
Volume	47
Issue number	1
DOIs	https://doi.org/10.1140/epjc/s2006-02554-2
Publication status	Published - 2006

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Times Cited: 29

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10.1140/epjc/s2006-02554-2

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title = "The construction of gauge-links in arbitrary hard processes",

abstract = "Transverse momentum dependent parton distribution and fragmentation functions are described by hadronic matrix elements of bilocal products of field operators off the light-cone. These bilocal products contain gauge-links, as required by gauge-invariance. The gauge-links are path-ordered exponentials connecting the field operators along a certain integration path. This integration path is process-dependent, depending specifically on the short-distance partonic subprocess. In this paper we present the technical details needed in the calculation of the gauge-links, and a calculational scheme is provided to obtain the gauge invariant distribution and fragmentation correlators corresponding to a given partonic subprocess.",

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AU - Pijlman, F.

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AB - Transverse momentum dependent parton distribution and fragmentation functions are described by hadronic matrix elements of bilocal products of field operators off the light-cone. These bilocal products contain gauge-links, as required by gauge-invariance. The gauge-links are path-ordered exponentials connecting the field operators along a certain integration path. This integration path is process-dependent, depending specifically on the short-distance partonic subprocess. In this paper we present the technical details needed in the calculation of the gauge-links, and a calculational scheme is provided to obtain the gauge invariant distribution and fragmentation correlators corresponding to a given partonic subprocess.

U2 - 10.1140/epjc/s2006-02554-2

DO - 10.1140/epjc/s2006-02554-2

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JO - European Physical Journal C. Particles and Fields

JF - European Physical Journal C. Particles and Fields

IS - 1

ER -

The construction of gauge-links in arbitrary hard processes

Abstract

Bibliographical note

UN SDGs

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