Direkt zum Inhalt

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

Twist-2 matching of transverse momentum dependent distributions

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

Date of publication of this fulltext: 27 Apr 2018 09:42
Article
DOI to cite this document: 10.5283/epub.37236


Abstract

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.



Involved Institutions


Details

Item typeArticle
Journal or Publication TitlePhysics Letters B
Publisher:Elsevier
Place of Publication:AMSTERDAM
Volume:2017
Number of Issue or Book Chapter:769
Page Range:pp. 84-89
Date2017
Additional Information (public)SCOAP3
InstitutionsPhysics > Institute of Theroretical Physics > Chair Professor Braun > Group Vladimir Braun
Identification Number
ValueType
10.1016/j.physletb.2017.03.031DOI
KeywordsPARTON DISTRIBUTIONS; RENORMALIZATION; REGULARIZATION; EVOLUTION; HELICITY
Dewey Decimal Classification500 Science > 530 Physics
StatusPublished
RefereedYes, this version has been refereed
Created at the University of RegensburgPartially
URN of the UB Regensburgurn:nbn:de:bvb:355-epub-372369
Item ID37236

Export bibliographical data

Owner only: item control page

nach oben