Transverse-momentum-dependent gluon distribution functions in a spectator model

被引：68

作者：

Bacchetta, Alessandro ^{[1
,2
]}

Celiberto, Francesco Giovanni ^{[1
,2
]}

Radici, Marco ^{[2
]}

Taels, Pieter ^{[3
]}

机构：

[1] Univ Pavia, Dipartimento Fis, Via Bassi 6, I-27100 Pavia, Italy

[2] Ist Nazl Fis Nucl, Sez Pavia, Via Bassi 6, I-27100 Pavia, Italy

[3] Ecole Polytech, Ctr Phys Theor, CNRS, IP Paris, F-91128 Palaiseau, France

来源：

EUROPEAN PHYSICAL JOURNAL C | 2020年 / 80卷 / 08期

基金：

欧洲研究理事会;

关键词：

POMERANCHUK SINGULARITY; SIVERS FUNCTION; LHC; ASYMMETRIES;

D O I：

10.1140/epjc/s10052-020-8327-6

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We present a model calculation of transverse-momentum-dependent distributions (TMDs) of gluons in the nucleon. The model is based on the assumption that a nucleon can emit a gluon, and what remains after the emission is treated as a single spectator particle. This spectator particle is considered to be on-shell, but its mass is allowed to take a continuous range of values, described by a spectral function. The nucleon-gluon-spectator coupling is described by an effective vertex containing two form factors. We fix the model parameters to obtain the best agreement with collinear gluon distributions extracted from global fits. We study the tomography in momentum space of gluons inside nucleons for various combinations of their polarizations. These can be used to make predictions of observables relevant for gluon TMD studies at current and future collider facilities.

引用

页数：11

共 90 条

[71] Associated production of a dilepton and a Υ (J/ψ) at the LHC as a probe of gluon transverse momentum dependent distributions [J].