Parton distributions for the LHC

Abstract

We present updated leading-order, next-to-leading order and next-to-next-to-leading order parton distribution functions ("MSTW 2008") determined from global analysis of hard-scattering data within the standard framework of leading-twist fixed-order collinear factorisation in the MSbar scheme. These parton distributions supersede the previously available "MRST" sets and should be used for the first LHC data-taking and for the associated theoretical calculations. New data sets fitted include CCFR/NuTeV dimuon cross sections, which constrain the strange quark and antiquark distributions, and Tevatron Run II data on inclusive jet production, the lepton charge asymmetry from W decays and the Z rapidity distribution. Uncertainties are propagated from the experimental errors on the fitted data points using a new dynamic procedure for each eigenvector of the covariance matrix. We discuss the major changes compared to previous MRST fits, briefly compare to parton distributions obtained by other fitting groups, and give predictions for the W and Z total cross sections at the Tevatron and LHC.

157 pages, 70 figures. Code can be found at http://projects.hepforge.org/mstwpdf/ and in LHAPDF V5.7.0. v3: final version published in EPJC with extended Section 12

References in corpus (27)

• Implications of CTEQ global analysis for collider observables
• EPS09 - a New Generation of NLO and LO Nuclear Parton Distribution Functions
• Parton Distributions for LO Generators
• Determination of nuclear parton distribution functions and their uncertainties at next-to-leading order
• Measurement of the inclusive jet cross section in $p\bar{p}$ collisions at $\sqrt{s}=1.96\mathrm{TeV}$
• Updated predictions for the total production cross sections of top and of heavier quark pairs at the Tevatron and at the LHC
• Update of Parton Distributions at NNLO
• Dynamical parton distributions of the nucleon and very small-x physics
• Impact parameter dependent colour glass condensate dipole model
• Heavy Quark Masses from Sum Rules in Four-Loop Approximation
• The Charm Parton Content of the Nucleon
• Measurement of the shape of the boson rapidity distribution for p\bar{p}-> Z/gamma*-> e+e- +X events produced at sqrt(s) of 1.96 TeV
• Small x Resummation with Quarks: Deep-Inelastic Scattering
• Measurement of Parton Distributions of Strange Quarks in the Nucleon from Charged-Kaon Production in Deep-Inelastic Scattering on the Deuteron
• Direct Measurement of the $W$ Production Charge Asymmetry in $\ppbar$ Collisions at $\sqrt{s}=1.96$ TeV
• Nuclear PDFs from neutrino deep inelastic scattering
• A Global Fit to Scattering Data with NLL BFKL Resummations
• Measurement of the electron charge asymmetry in ppbar->W+X->enu+X events at sqrt{s}=1.96 TeV
• PQCD Formulations with Heavy Quark Masses and Global Analysis
• Higher order QCD corrections to charged-lepton deep-inelastic scattering and global fits of parton distributions
• Evaluation of the Theoretical Uncertainties in the W to Lepton and Neutrino Cross Sections at the LHC
• Update on Neural Network Parton Distributions: NNPDF1.1
• Understanding the Standard Model, as a bridge to the discovery of new phenomena at the LHC
• Different PDF approximations useful for LO Monte Carlo generators
• Determination of the longitudinal proton structure function FL at low Q2 at HERA
• The Longitudinal Structure Function at HERA
• Longitudinal Structure Function Measurements from HERA

Cited by in corpus (35)

• Parton Distributions for LO Generators
• Measuring the running top-quark mass
• Update of Parton Distributions at NNLO
• Precision determination of electroweak parameters and the strange content of the proton from neutrino deep-inelastic scattering
• Electroweak and finite quark-mass effects on the Higgs boson transverse momentum distribution
• Photon - Jet Correlations and Constraints on Fragmentation Functions
• Perturbative QCD effects and the search for a H->WW->l nu l nu signal at the Tevatron
• PQCD Formulations with Heavy Quark Masses and Global Analysis
• Differences between charged-current coefficient functions
• Improved formulation of global QCD analysis with zero-mass hard cross sections
• Effects of QCD radiation on inclusive variables for determining the scale of new physics at hadron colliders
• New results for t bar t production at hadron colliders
• Angular correlations in t-channel single top production at the LHC
• Two-Loop QCD Helicity Amplitudes for (2+1)-Jet Production in Deep Inelastic Scattering
• Higher-order corrections to top-antitop pair and single top quark production
• Parton Distributions and QCD at LHCb
• Recent Progress in Global PDF Analysis
• Remarkable virtual SUSY effects in $W^{\pm }$ production at high energy hadron colliders
• Genuine SUSY signatures from $ug\to \tilde d \tchi_i^+$ and $ug\to d{W}^{+}$, at high energies
• Variable-Flavor-Number Scheme in Analysis of Heavy-Quark Electro-Production Data
• Global analysis of nuclear parton distribution functions at leading and next-to-leading order perturbative QCD
• Towards small x resummed DIS phenomenology
• Flavor Asymmetry of the Nucleon Sea and W Boson Production
• Theoretical Status of Higgs Production at Hadron Colliders in the SM
• Potential PDF sensitivity at LHCb
• Status of MRST/MSTW PDF sets
• The role of uncertainties in parton distribution functions
• The NNPDF1.2 parton set: implications for the LHC
• The Drell-Yan process in NNLO QCD
• Searches for a high mass Standard Model Higgs boson at the Tevatron
• The HERA challenges for LHC
• Structure Functions and Low-x -- Working Group Summary
• Strange and Anti-strange Sea Distributions from Neutrino-Nucleon Deep Inelastic Scattering
• Structure Functions and Low-x
• Heavy flavours: working group summary