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Gutierrez-Reyes, Daniel ; Scimemi, Ignazio ; Vladimirov, Alexey A.

Twist-2 matching of transverse momentum dependent distributions

Gutierrez-Reyes, Daniel, Scimemi, Ignazio und Vladimirov, Alexey A. (2017) Twist-2 matching of transverse momentum dependent distributions. Physics Letters B 2017 (769), S. 84-89.

Veröffentlichungsdatum dieses Volltextes: 27 Apr 2018 09:42
Artikel
DOI zum Zitieren dieses Dokuments: 10.5283/epub.37236


Zusammenfassung

We systematically study the large-qT (or small-b) matching of transverse momentum dependent (TMD) distributions to the twist-2 integrated parton distributions. Performing operator product expansion for a generic TMD operator at the next-to-leading order (NLO) we found the complete set of TMD distributions that match twist-2. These are unpolarized, helicity, transversity, pretzelosity and linearly ...

We systematically study the large-qT (or small-b) matching of transverse momentum dependent (TMD) distributions to the twist-2 integrated parton distributions. Performing operator product expansion for a generic TMD operator at the next-to-leading order (NLO) we found the complete set of TMD distributions that match twist-2. These are unpolarized, helicity, transversity, pretzelosity and linearly polarized gluon distributions. The NLO matching coefficients for these distributions are presented. The pretzelosity matching coefficient is zero at the presented order, however, it is evident that it is non-zero in the following orders. This result offers a natural explanation of the small value of pretzelosity found in phenomenological fits. We also demonstrate that the cancellation of rapidity divergences by the leading order soft factor imposes the necessary requirement on the Lorentz structure of TMD operators, which is supported only by the TMD distributions of leading dynamical twist. Additionally, this requirement puts restrictions on the gamma(5)-definition in the dimensional regularization. (C) 2017 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license.



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Details

DokumentenartArtikel
Titel eines Journals oder einer ZeitschriftPhysics Letters B
Verlag:Elsevier
Ort der Veröffentlichung:AMSTERDAM
Band:2017
Nummer des Zeitschriftenheftes oder des Kapitels:769
Seitenbereich:S. 84-89
Datum2017
Zusätzliche Informationen (Öffentlich)SCOAP3
InstitutionenPhysik > Institut für Theoretische Physik > Lehrstuhl Professor Braun > Arbeitsgruppe Vladimir Braun
Identifikationsnummer
WertTyp
10.1016/j.physletb.2017.03.031DOI
Stichwörter / KeywordsPARTON DISTRIBUTIONS; RENORMALIZATION; REGULARIZATION; EVOLUTION; HELICITY
Dewey-Dezimal-Klassifikation500 Naturwissenschaften und Mathematik > 530 Physik
StatusVeröffentlicht
BegutachtetJa, diese Version wurde begutachtet
An der Universität Regensburg entstandenZum Teil
URN der UB Regensburgurn:nbn:de:bvb:355-epub-372369
Dokumenten-ID37236

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