The Structure of the Proton in the LHC Precision Era
By Jun Gao, L. Harland–Lang, Juan Rojo. 2017
227 citations recorded by the source corpus.
We review recent progress in the determination of the parton distribution functions (PDFs) of the proton, with emphasis on the applications for precision phenomenology at the Large Hadron Collider (LHC). First of all, we introduce the general theoretical framework underlying the global QCD analysis of the quark and gluon internal structure of protons. We then present a detailed overview of the hard-scattering measurements, and the corresponding theory predictions, that are used in state-of-the-art PDF fits. We emphasize here the role that higher-order QCD and electroweak corrections play in the description of recent high-precision collider data. We present the methodology used to extract PDFs in global analyses, including the PDF parametrization strategy and the definition and propagation of PDF uncertainties. Then we review and compare the most recent releases from the various PDF fitting collaborations, highlighting their differences and similarities. We discuss the role that QED corrections and photon-initiated contributions play in modern PDF analysis. We provide representative examples of the implications of PDF fits for high-precision LHC phenomenological applications, such as Higgs coupling measurements and searches for high-mass New Physics resonances. We conclude this report by discussing some selected topics relevant for the future of PDF determinations, including the treatment of theoretical uncertainties, the connection with lattice QCD calculations, and the role of PDFs at future high-energy colliders beyond the LHC.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/38160d6f4a1827fa7acbcbaf12ebd2d6b21e2f69
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In Nuclear and High Energy Physics
- Atlas Collaboration
- Cms Collaboration
- Gudrun Heinrich
- Fabio Maltoni
- M. Schönherr
- Ansgar Denner
- Juan Rojo
- S. Höche
Citations in the corpus
- A Guide to Light-Cone PDFs from Lattice QCD: An Overview of Approaches, Techniques, and Results (2018, background): “[26] Jun Gao, Lucian Harland-Lang, and Juan Rojo, “The Structure of the Proton in the LHC Precision Era,” Phys.”
- A Monte Carlo global analysis of the Standard Model Effective Field Theory: the top quark sector (2019, background): “SMEFT fits therefore represent, conceptually, a similar problem to that arising in the global QCD analysis of the quark and gluon structure of the proton in terms of parton distribution functions (PDFs) [23–25].”
- Higgs Physics at the HL-LHC and HE-LHC (2019, background): “The detailed understanding of the quark and gluon structure of the proton, quantified by the parton distribution functions (PDFs) [92, 93, 94], is an essential ingredient for the theoretical predictions at hadron colliders.”
- Illuminating the photon content of the proton within a global PDF analysis (2017, background): “In order to make the most of these developments in the calculation of higher-order QCD and EW corrections, equivalent progress in the determination of the parton distribution functions (PDFs) of the proton [15] is vital.”
- Les Houches 2017: Physics at TeV Colliders Standard Model Working Group Report (2017, background): “1 Parton distribution uncertainties The accurate determination of the uncertainties on parton distribution functions (PDFs) of the proton [402] has been the main challenge in PDF studies at the LHC.”