Parton distributions for the LHC run II

By R. Ball, Valerio Bertone, Stefano Carrazza, C. Deans, Luigi Del Debbio, S. Forte, Alberto Guffanti, Nathan Hartland, José I. Latorre, Juan Rojo and 2 more. 2014

2,887 citations recorded by the source corpus.

A bstractWe present NNPDF3.0, the first set of parton distribution functions (PDFs) determined with a methodology validated by a closure test. NNPDF3.0 uses a global dataset including HERA-II deep-inelastic inclusive cross-sections, the combined HERA charm data, jet production from ATLAS and CMS, vector boson rapidity and transverse momentum distributions from ATLAS, CMS and LHCb, W +c data from CMS and top quark pair production total cross sections from ATLAS and CMS. Results are based on LO, NLO and NNLO QCD theory and also include electroweak corrections. To validate our methodology, we show that PDFs determined from pseudo-data generated from a known underlying law correctly reproduce the statistical distributions expected on the basis of the assumed experimental uncertainties. This closure test ensures that our methodological uncertainties are negligible in comparison to the generic theoretical and experimental uncertainties of PDF determination. This enables us to determine with confidence PDFs at different perturbative orders and using a variety of experimental datasets ranging from HERA-only up to a global set including the latest LHC results, all using precisely the same validated methodology. We explore some of the phenomenological implications of our results for the upcoming 13 TeV Run of the LHC, in particular for Higgs production cross-sections.

Subfields: Computer Networks and Communications, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/54c28fb5ffeebd49e36427e18fdba3f77e39a810

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Citations in the corpus

Fully differential NNLO computations with MATRIX (2017, methodology): “ses apply the 5FS with a vanishing bottom mass m b= 0. The top quark is treated as massive and unstable throughout, and we set m t= 173:2GeV as well as t= 1:44262GeV.40 We use the consistent NNPDF3.0 [109] set of parton distributions (PDFs) with n f = 4 or n f = 5 active quark avours. In particular,”
Search for new phenomena in high-mass diphoton final states using 37 fb−1 of proton–proton collisions collected at s=13 TeV with the ATLAS detector (2017, positive): “0 NLO parton distribution functions (PDFs) [26], using the A14 set of tuned parameters (tune) of P ythia 8.186 [27, 28] for the parton-shower and hadronization simulation.”
Parton distributions from high-precision collider data (2017, methodology): “re implemented by computing at the hadron level the bin-by-bin ratio of the NNLO to NLO prediction with a pre-dened PDF set, and applying the correction to the NLO computation (see Sect. 2.3 of Ref. [5]). For all new data included in NNPDF3.1, the PDF set used for the computation of these correction”
Herwig 7.0/Herwig++ 3.0 release note (2015, methodology): “ UE-MMHT, which it uses by default. More information and other related tunes can be obtained fromthe Herwig tunes page. 4 In the near future we also plan to provide tunes using CT14 [48] and NNPDF3.0 [49] parton distribution functions. 6 Steering, Integration and Run Modes Owing to the complexity of”
Performance of missing transverse momentum reconstruction in proton-proton collisions at √s = 13 TeV using the CMS detector (2019, methodology): “0 [24] parton distribution functions (PDFs) are used for all samples, with the order matching the matrix element calculations.”
Search for doubly charged Higgs boson production in multi-lepton final states with the ATLAS detector using proton–proton collisions at \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepac (2017, positive): “0 [43], ABM12 [79], HERAPDF2.”
New observables in inclusive production of quarkonia (2019, methodology): “Figure 32: Comparison between a selection [50] of PT -integrated prompt J/ψ cross sections measured at y = 0 and the NLO CEM results computed with MCFM [384] with two choices of the charm-quark mass (mc) and with the PDFs [386, 387, 388] as a function of √ s.”