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 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.
Cited by 4
M. Dyndal et al., Probing the photonic content of the proton using photon-induced dilepton production in
collisions at the LHC
Phys. Rev. D 99, 114008 (2019) [Crossref]
Jonas Bergner et al., The top quark charge asymmetry in
production at the LHC
Eur. Phys. J. C 79, 189 (2019) [Crossref]
Silvia Pascoli et al., Safe jet vetoes
Physics Letters B 786, 106 (2018) [Crossref]
Max Reyer et al., Full NLO corrections to 3-jet production and
at the LHC
Eur. Phys. J. C 79, 321 (2019) [Crossref]
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- 1 Vrije Universiteit Amsterdam / VU University Amsterdam [VU]
- 2 Nationaal instituut voor Subatomaire Fysica / National Institute for Subatomic Physics [NIKHEF]
- 3 Organisation européenne pour la recherche nucléaire / European Organization for Nuclear Research [CERN]