The transverse structure of the pion in momentum space inspired by the AdS/QCD correspondence

被引：33

作者：

Bacchetta, Alessandro ^{[1
,2
]}

Cotogno, Sabrina ^{[3
,4
]}

Pasquini, Barbara ^{[1
,2
]}

机构：

[1] Univ Pavia, Dipartimento Fis, I-27100 Pavia, Italy

[2] Ist Nazl Fis Nucl, Sez Pavia, I-27100 Pavia, Italy

[3] Nikhef, Sci Pk 105, NL-1098 XG Amsterdam, Netherlands

[4] Vrije Univ Amsterdam, Dept Phys & Astron, Boelelaan 1081, NL-1081 HV Amsterdam, Netherlands

来源：

PHYSICS LETTERS B | 2017年 / 771卷

基金：

欧洲研究理事会;

关键词：

AdS/QCD correspondence; Pion TMD; TMD evolution; GENERALIZED PARTON DISTRIBUTIONS; FORM-FACTOR; ELECTROPRODUCTION; SCATTERING; EVOLUTION; QCD;

D O I：

10.1016/j.physletb.2017.05.072

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the internal structure of the pion using a model inspired by the AdS/QCD correspondence. The holographic approach provides the light-front wave function (LFWF) for the leading Fock-state component of the pion. We adopt two different forms for the LFWF derived from the AdS/QCD soft-wall model, with free parameters fitted to the available experimental information on the pion electromagnetic form factor and the leading-twist parton distribution function. The intrinsic scale of the model is taken as an additional fit parameter. Within this framework, we provide predictions for the unpolarized transverse momentum dependent parton distribution (TMD), and discuss its property both at the scale of the model and after TMD evolution to higher scales that are relevant for upcoming experimental measurements. (C) 2017 The Author(s). Published by Elsevier B.V.

引用

页码：546 / 552

页数：7

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