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.
Illuminating the photon content of the proton within a global PDF analysis / V. Bertone, S. Carrazza, N. Hartland, J. Rojo. - In: SCIPOST PHYSICS. - ISSN 2542-4653. - 5:1(2018 Jul 25).
Titolo: | Illuminating the photon content of the proton within a global PDF analysis |
Autori: | CARRAZZA, STEFANO (Secondo) |
Settore Scientifico Disciplinare: | Settore FIS/02 - Fisica Teorica, Modelli e Metodi Matematici |
Progetto: | Proton strucure for discovery at the Large Hadron Collider (NNNPDF) |
Data di pubblicazione: | 25-lug-2018 |
Rivista: | |
Tipologia: | Article (author) |
Digital Object Identifier (DOI): | http://dx.doi.org/10.21468/SciPostPhys.5.1.008 |
Appare nelle tipologie: | 01 - Articolo su periodico |
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