Preprint

PUBDB-2025-00696

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png One-loop matching for leading-twist generalised transverse-momentum-dependent distributions

Bertone, V. ; Echevarria, M. G. ; del Rio, Ó. ; Rodini, S. (Corresponding author)DESY*

2025

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Please use a persistent id in citations: doi:10.3204/PUBDB-2025-00696

Report No.: DESY-25-024; IPARCOS-UCM-25-004; arXiv:2502.07576

Abstract: We present the one-loop matching coefficients necessary to match all of the leading-twist generalised transverse-momentum-dependent distributions (GTMDs) onto generalised parton distributions (GPDs). Matching functions are extracted by computing the first radiative corrections to partonic bilocal correlators with staple-like Wilson lines, as appropriate for high-energy collisions. These correlators are characterised by a transverse displacement and skewed kinematics of external states. Using the proton helicity basis, they are parametrised in terms of GTMDs, which are subsequently related to leading-twist GPDs. Our results provide new insights into the complex dynamics of GTMDs generated by radiative corrections. In particular, we show that time-reversal even and odd contributions to GTMDs in the so-called ERBL region mix both under matching and evolution. Finally, we present a selection of numerical results and comment on the quantitative behaviour of GTMDs.

Note: 27 pages, 3 figures

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Contributing Institute(s):

1. Theorie-Gruppe (T)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)
2. DFG project G:(GEPRIS)409651613 - FOR 2926: Next Generation Perturbative QCD for Hadron Structure: Preparing for the Electron-Ion Collider (409651613) (409651613)
3. DFG project G:(GEPRIS)430915355 - Multi-Parton Wechselwirkungen und Beiträge mit höherem Twist (430915355) (430915355)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2025

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Database coverage:
; Published

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Journal Article Bertone, V. (Corresponding author)Extern* ; Echevarria, M. G. ; del Rio, Ó. ; Rodini, S. (Corresponding author)DESY*
One-loop matching for leading-twist generalised transverse-momentum-dependent distributions
Journal of high energy physics 05(5), 183 (2025) [10.1007/JHEP05(2025)183]2025     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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