Illuminating the photon content of the proton within a global PDF analysis

被引：142

作者：

Bertone, Valerio ^{[1
,2
]}

Carrazza, Stefano ^{[3
]}

Hartland, Nathan P. ^{[1
,2
]}

Rojo, Juan ^{[1
,2
]}

机构：

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

[2] Nikhef Theory Grp, Sci Pk 105, NL-1098 XG Amsterdam, Netherlands

[3] CERN, Dept Theoret Phys, CH-1211 Geneva, Switzerland

来源：

SCIPOST PHYSICS | 2018年 / 5卷 / 01期

基金：

欧洲研究理事会;

关键词：

DEUTERON STRUCTURE FUNCTIONS; PRODUCTION CROSS-SECTION; HIGH STATISTICS MEASUREMENT; INELASTIC MUON SCATTERING; PP COLLISIONS; ROOT-S=13 TEV; PARTON DISTRIBUTIONS; DIMUON PRODUCTION; RESONANCE REGION; W-PRODUCTION;

D O I：

10.21468/SciPostPhys.5.1.008

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Precision phenomenology at the LHC requires accounting for both higher-order QCD and electroweak corrections as well as for photon-initiated subprocesses. Building upon the recent NNPDF3.1 fit, in this work the photon content of the proton is determined within a global analysis supplemented by the LUXqed constraint relating the photon PDF to lepton-proton scattering structure functions: NNPDF3.1luxQED. The uncertainties on the resulting photon PDF are at the level of a few percent, with photons carrying up to similar or equal to 0.5% of the proton's momentum. We study the phenomenological implications of NNPDF3.1luxQED at the LHC for Drell-Yan, vector boson pair, top quark pair, and Higgs plus vector boson production. We find that photon-initiated contributions can be significant for many processes, leading to corrections of up to 20%. Our results represent a state-of-the-art determination of the partonic structure of the proton including its photon component.

引用

页数：33

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