Parton distributions from deep-inelastic-scattering data

By S. Alekhin. 2002

146 citations recorded by the source corpus.

We perform the analysis of existing light-targets deep-inelastic-scattering data in the leading-order, next-to-leading-order, and next-to-next-to-leading-order (NNLO) QCD approximations and extract parton distribution functions (PDFs) simultaneously with the value of the strong coupling constant ${\ensuremath{\alpha}}_{s}$ and the high-twist contribution to the structure functions. The main theoretical uncertainties and experimental uncertainties due to all sources of experimental errors in the data are estimated; the latter generally dominate for the obtained PDFs. The uncertainty in the Higgs boson production cross section due to errors in PDFs is $\ensuremath{\sim}2%$ for the CERN LHC and varies from 2% to 10% for the Fermilab collider under variation of the Higgs boson mass from $100\mathrm{GeV}$ to $300\mathrm{GeV}.$ For the W-boson production cross section the uncertainty is $\ensuremath{\sim}2%$ for the both colliders. The value of ${\ensuremath{\alpha}}_{\mathrm{s}}^{\mathrm{NNLO}}{(M}_{\mathrm{Z}})=0.1143\ifmmode\pm\else\textpm\fi{}0.0014(\mathrm{expt})$ is obtained, while the high-twist terms do not vanish up to the NNLO as required by comparison to data.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/10cf4b44719e630771c63ef689b083dfd93d259e

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Citations in the corpus

Progress in the Determination of the Partonic Structure of the Proton (2013, methodology): “A comprehensive study of the PDF dependence of key LHC cross sections has recently been made in Reference [45], following earlier work in References [42–44].”
Soft-gluon resummation for Higgs boson production at hadron colliders (2003, methodology): “The cross section differences that we find at NLO are compatible with the experimental uncertainty on the NLO gluon luminosity quoted by the three groups, which is below about ±5% at the LHC and about ±10% at the Tevatron [50, 53, 54].”