Parton distributions for the LHC

doi:10.3204/PROC07-01/27

Open AccessProceedings Article10.3204/PROC07-01/27

Parton distributions for the LHC

R. S. Thorne, +3 more

- 01 Jan 2007

pp 305-308

3K

TL;DR: In this paper, a preliminary set of updated NLO parton distributions and their uncertainties determined from CCFR and NuTeV dimuon cross sections are presented, along with additional jet data from HERA and the Tevatron.

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Figures

Figure 24: The reduced cross section σ̃(x,Q2) for a selection of HERA data and the structure function F2(x,Q 2) for a selection of fixed-target data. The curves represent σ̃(x,Q2), evaluated at the HERA centre-of-mass energy, and so for the high x and low Q2 values corresponding to fixed-target data, y is negligible and the curves effectively represent the required F2(x,Q 2). The normalisations of data sets are those in the best fit at NNLO, found in Table 3. These are very similar to those at NLO, but at LO the HERA data would be 0.5–1% lower in general.

Figure 68: W ≡ W+ + W− and Z total cross sections at the LHC (√s = 14 TeV). The error ellipses, calculated using the one-sigma error sets, are shown for the MSTW 2008 NLO and NNLO PDFs.

Figure 44: A comparison of theory and data for W → µν charge asymmetry from DØ [49].

Figure 70: Ratio of parton luminosities at √ s = 10 TeV compared to √ s = 14 TeV at the LHC, using the MSTW 2008 NLO PDFs including the one-sigma uncertainty bands.

Figure 7: Probability density function of the χ2-distribution with 163 degrees of freedom.

Figure 59: Predictions for the longitudinal proton structure function, FL(x,Q 2), using NNLO PDFs and LO, NLO and NNLO coefficient functions.

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