The color dipole picture for prompt photon production in pp and pPb collisions at the CERN-LHC

被引：10

作者：

Sampaio dos Santos, G. ^{[1
]}

Gil da Silveira, G. ^{[1
,2
]}

Machado, M. V. T. ^{[1
]}

机构：

[1] GFPAE IF UFRGS, High Energy Phys Phenomenol Grp, Caixa Postal 15051, BR-91501970 Porto Alegre, RS, Brazil

[2] Univ Estado Rio de Janeiro, Dept Fis Nucl & Altas Energias, BR-20550013 Rio De Janeiro, RJ, Brazil

来源：

EUROPEAN PHYSICAL JOURNAL C | 2020年 / 80卷 / 09期

关键词：

CROSS-SECTION; P(P)OVER-BAR COLLISIONS; ENERGY; PHYSICS; PROTON;

D O I：

10.1140/epjc/s10052-020-8405-9

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：

A study on the prompt photon production within the QCD color dipole picture with emphasis in pp and pA collisions at the LHC energy regimes is performed. We present predictions for the differential cross section as a function of photon transverse momentum at different rapidity bins considering updated phenomenological color dipole models, which take into account the QCD gluon saturation physics. The results are directly compared to the recent experimental measurements provided by CMS and ATLAS Collaborations, showing a reasonable agreement in all rapidity bins with no free parameters. Special attention is given to the IPSAT model given its good description of the data in all rapidity bins from low- to high-pT ranges. As a result, a free-parameter approach has succeeded in describing the LHC data for prompt photon production, while new predictions for the 13-TeV data is presented in view of new data to confirm such prospect.

引用

页数：13

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