Transverse momentum dependent parton distributions in a light-cone quark model

被引：162
作者：
Pasquini, B. [1 ]
Cazzaniga, S.
Boffi, S.
机构：
[1] Univ Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, Italy
来源：
PHYSICAL REVIEW D | 2008年 / 78卷 / 03期
关键词：
D O I：
10.1103/PhysRevD.78.034025
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The leading twist transverse momentum dependent parton distributions (TMDs) are studied in a light-cone description of the nucleon where the Fock expansion is truncated to consider only valence quarks. General analytic expressions are derived in terms of the six amplitudes needed to describe the three-quark sector of the nucleon light-cone wave function. Numerical calculations for the T-even TMDs are presented in a light-cone constituent quark model, and the role of the so-called pretzelosity is investigated to produce a nonspherical shape of the nucleon.
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页数：15
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