Parton distributions for the LHC
R. S. Thorne,W. J. Stirling,Alan D. Martin,G. Watt +3 more
- 01 Jan 2007
pp 305-308
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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Abstract: We present a preliminary set of updated NLO parton distributions. For the first time we have a quantitative extraction of the strange quark and antiquark distributions and their uncertainties determined from CCFR and NuTeV dimuon cross sections. Additional jet data from HERA and the Tevatron improve our gluon extraction. Lepton asymmetry data and neutrino structure functions improve the flavour separation, particularly constraining the down quark valence distribution.
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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].](/figures/figure44-1-445qpxeeihpi.png)
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.
![Figure 44: A comparison of theory and data for W → µν charge asymmetry from DØ [49].](/figures/figure44-1-445qpxeeihpi.webp)
Citations
Search for Supersymmetry in Final States Containing two Hadronically Decaying Taus with the ATLAS Detector at √s = 8 and 13 TeV
Christopher Bock
- 09 Nov 2016
TL;DR: In this article, the authors analyse the effect of supersymmetrischen Teilchen in Proton-Proton Kollisionen auseinander setzen, i.e., the Suche nach supersymmetric Teilchteinension von kaninesetions.
6
Drell-Yan Lepton-Pair-Jet Correlation in pA Collisions
TL;DR: In this paper, the angular correlation function of the process p A → l l ¯ π 0 X, which provides a clean probe of the nuclear structure, and compute numerical predictions for the correlation function based on three models for the UGD: the GBW model, and BK evolution with fixed and running coupling.
6
PDF fit in the fixed-flavor-number scheme
S. Alekhin,J. Blümlein,S. Moch +2 more
- 01 Jan 2012
TL;DR: In this paper, the heavy quark contribution to deep-inelastic scattering in the scheme with n f = 3, 4, 5 fixed flavors was discussed and compared with other PDF sets and the implications for measuring the strong coupling constant α s (M Z ).
Searches for exotic heavy quarks decaying into a W-Boson and a b-Quark with the ATLAS experiment
Snezana Nektarijevic
- 22 Jun 2015
TL;DR: In this paper, searches for two hypothetical heavy quarks are presented: the fourth Standard Model generation up-type quark t', and the vector-like quark T, predicted by the new physics models involving extra dimensions or a composite Higgs boson.
6
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