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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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| Dokumentenart | Artikel | ||||
| Titel eines Journals oder einer Zeitschrift | Physics Letters B | ||||
| Verlag: | Elsevier | ||||
|---|---|---|---|---|---|
| Ort der Veröffentlichung: | AMSTERDAM | ||||
| Band: | 2017 | ||||
| Nummer des Zeitschriftenheftes oder des Kapitels: | 769 | ||||
| Seitenbereich: | S. 84-89 | ||||
| Datum | 2017 | ||||
| Zusätzliche Informationen (Öffentlich) | SCOAP3 | ||||
| Institutionen | Physik > Institut für Theoretische Physik > Lehrstuhl Professor Braun > Arbeitsgruppe Vladimir Braun | ||||
| Identifikationsnummer |
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| Stichwörter / Keywords | PARTON DISTRIBUTIONS; RENORMALIZATION; REGULARIZATION; EVOLUTION; HELICITY | ||||
| Dewey-Dezimal-Klassifikation | 500 Naturwissenschaften und Mathematik > 530 Physik | ||||
| Status | Veröffentlicht | ||||
| Begutachtet | Ja, diese Version wurde begutachtet | ||||
| An der Universität Regensburg entstanden | Zum Teil | ||||
| URN der UB Regensburg | urn:nbn:de:bvb:355-epub-372369 | ||||
| Dokumenten-ID | 37236 |
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