Update of Parton Distributions at NNLO

Abstract

We present a new set of parton distributions obtained at NNLO. These differ from the previous sets available at NNLO due to improvements in the theoretical treatment. In particular we include a full treatment of heavy flavours in the region near the quark mass. In this way, an essentially complete set of NNLO partons is presented for the first time. The improved treatment leads to a significant change in the gluon and heavy quark distributions, and a larger value of the QCD coupling at NNLO, alpha_S(M_Z^2) = 0.1191 +/- 0.002(expt.) +/- 0.003(theory). Indirectly this also leads to a change in the light partons at small x and modifications of our predictions for W and Z production at the LHC. As well as the best-fit set of partons, we also provide 30 additional sets representing the uncertainties of the partons obtained using the Hessian approach.

13 pages, 11 figures. Version published. Slight extension and some modification of references

References in corpus (53)

• Parton distributions for the LHC
• The Three-Loop Splitting Functions in QCD: The Non-Singlet Case
• Next-to-Next-to-Leading Order Higgs Production at Hadron Colliders
• Higgs boson production at hadron colliders in NNLO QCD
• BFKL pomeron in the next-to-leading approximation
• High-precision QCD at hadron colliders: electroweak gauge boson rapidity distributions at NNLO
• The Three-Loop Splitting Functions in QCD: The Singlet Case
• NNLO corrections to the total cross section for Higgs boson production in hadron-hadron collisions
• Energy Scale(s) and Next-to-leading BFKL Equation
• NNLO QCD corrections to the Higgs-strahlung processes at hadron colliders
• High-Energy Factorization and Small-X Deep Inelastic Scattering Beyond Leading Order
• Uncertainties of predictions from parton distribution functions II: the Hessian method
• Uncertainties of predictions from parton distributions. I: experimental errors
• The third-order QCD corrections to deep-inelastic scattering by photon exchange
• Higgs boson production in bottom quark fusion at next-to-next-to-leading order
• NNLO global parton analysis
• Dilepton rapidity distribution in the Drell-Yan process at NNLO in QCD
• Charm electroproduction viewed in the variable-flavour number scheme versus fixed-order perturbation theory
• Fully differential Higgs boson production and the di-photon signal through next-to-next-to-leading order
• Precise Measurement of Dimuon Production Cross-Sections in muon neutrino Fe and muon antineutrino Fe Deep Inelastic Scattering at the Tevatron
• An Ordered Analysis of Heavy Flavour Production in Deep Inelastic Scattering
• Physical Gluons and High $E_T$ Jets
• The 3-loop QCD calculation of the moments of deep inelastic structure functions
• Higgs boson production at hadron colliders: differential cross sections through next-to-next-to-leading order
• Uncertainties of predictions from parton distributions. I: Theoretical errors
• A Variable-Flavour Number Scheme for NNLO
• Heavy quark coefficient functions at asymptotic values $Q^2\gg m^2$
• Precise Measurement of Neutrino and Anti-neutrino Differential Cross Sections
• The Longitudinal Structure Function at the Third Order
• NNLO evolution of deep-inelastic structure functions: the singlet case
• Parton distributions from deep-inelastic-scattering data
• Open Heavy Flavor Production in QCD -- Conceptual Framework and Implementation Issues
• NNLO evolution of deep-inelastic structure functions: the non-singlet case
• CTEQ6 Parton Distributions with Heavy Quark Mass Effects
• Some higher moments of deep inelastic structure functions at next-to-next-to leading order of perturbative QCD
• Heavy Quark Mass Effects in Deep Inelastic Scattering and Global QCD Analysis
• Effects of Higher-Order Threshold Corrections in High-E_T Jet Production
• Measurement and QCD Analysis of Jet Cross Sections in Deep-Inelastic Positron-Proton Collisions at sqrt(s) of 300 GeV
• Improved Approximations for the Three-Loop Splitting Functions in QCD
• Measurement of F_2^ccbar and F_2^bbbar at High Q^2 using the H1 Vertex Detector at HERA
• Measurement of F_2^{c\bar{c}} and F_2^{b\bar{b}} at Low Q^2 and x using the H1 Vertex Detector at HERA
• Inclusive jet cross sections in the Breit frame in neutral current deep inelastic scattering at HERA and determination of alpha_s
• A Practical Procedure for Evolving Heavy Flavour Structure Functions
• Measurement of D*+- production in deep inelastic ep scattering at HERA
• Measurement of the Forward-Backward Charge Asymmetry from W --> e nu Production in p anti-p Collisions at s**(1/2) = 1.96 TeV
• Inclusive Jet Production in pbar p Collisions
• Fixed target Drell-Yan data and NNLO QCD fits of parton distribution functions
• Measurement of the Inclusive Jet Cross Section in $\bar{p}p$ collisions at $\sqrt{s}=1.8$ TeV
• Inclusive-jet and dijet cross sections in deep inelastic scattering at HERA
• Estimating the effect of NNLO contributions on global parton analyses
• Parton distribution functions from the precise NNLO QCD fit
• Stability of NLO Global Analysis and Implications for Hadron Collider Physics
• A Variable Flavour Number Scheme for Heavy Quark Production at Small x

Cited by in corpus (148)

• Parton distributions for the LHC
• Implications of CTEQ global analysis for collider observables
• HiggsBounds: Confronting Arbitrary Higgs Sectors with Exclusion Bounds from LEP and the Tevatron
• A Large Hadron Electron Collider at CERN: Report on the Physics and Design Concepts for Machine and Detector
• FEWZ 2.0: A code for hadronic Z production at next-to-next-to-leading order
• Uncertainties on alpha_S in global PDF analyses and implications for predicted hadronic cross sections
• The 2009 World Average of ${\alpha }_s$
• Theoretical status and prospects for top-quark pair production at hadron colliders
• A Higher Order Perturbative Parton Evolution Toolkit (HOPPET)
• Mixed QCD-electroweak corrections to Higgs boson production in gluon fusion
• Updated predictions for the total production cross sections of top and of heavier quark pairs at the Tevatron and at the LHC
• A determination of parton distributions with faithful uncertainty estimation
• Higgs production through gluon fusion: updated cross sections at the Tevatron and the LHC
• Renormalization-Group Improved Prediction for Higgs Production at Hadron Colliders
• The Structure of the Proton in the LHC Precision Era
• The theoretical top quark cross section at the Tevatron and the LHC
• Dynamical NNLO parton distributions
• Distribution Functions of the Nucleon and Pion in the Valence Region
• Impact parameter dependent colour glass condensate dipole model
• Antenna subtraction at NNLO with hadronic initial states: initial-final configurations
• Predictions for $p+$Pb Collisions at sqrt s_NN = 5 TeV
• Heavy-quark mass dependence in global PDF analyses and 3- and 4-flavour parton distributions
• Search for massive resonances in dijet systems containing jets tagged as W or Z boson decays in pp collisions at sqrt(s) = 8 TeV
• Hadron structure from lattice quantum chromodynamics
• Hunting Quasi-Degenerate Higgsinos
• Combination of Tevatron searches for the standard model Higgs boson in the W+W- decay mode
• Single top quark production at LHC with anomalous Wtb couplings
• PDF Nuclear Corrections for Charged Lepton and Neutrino Deep Inelastic Scattering Processes
• Precision determination of electroweak parameters and the strange content of the proton from neutrino deep-inelastic scattering
• A Review of Target Mass Corrections
• Measurement of the Charm and Beauty Structure Functions using the H1 Vertex Detector at HERA
• Global analysis of nuclear parton distribution functions and their uncertainties at next-to-next-to-leading order
• Search for Resonances in the Dilepton Mass Distribution in pp Collisions at sqrt(s) = 7 TeV
• Direct Measurement of the $W$ Production Charge Asymmetry in $\ppbar$ Collisions at $\sqrt{s}=1.96$ TeV
• Evolution of twist-3 multi-parton correlation functions relevant to single transverse-spin asymmetry
• The forward-backward asymmetry of top quark production at the Tevatron in warped extra dimensional models
• Measurement of the Proton Structure Function F_L at Low x
• CGC predictions for p+A collisions at the LHC and signature of QCD saturation
• Measurements of top quark pair relative differential cross-sections with ATLAS in pp collisions at sqrt(s) = 7 TeV
• W boson production at hadron colliders: the lepton charge asymmetry in NNLO QCD
• The Custodial Randall-Sundrum Model: From Precision Tests to Higgs Physics
• Prompt photon production and photon-hadron correlations at RHIC and the LHC from the Color Glass Condensate
• Search for the third-generation scalar leptoquarks and heavy right-handed neutrinos in final states with two tau leptons and two jets in proton-proton collisions at sqrt(s) = 13 TeV
• Search for the direct production of charginos, neutralinos and staus in final states with at least two hadronically decaying taus and missing transverse momentum in $pp$ collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• Heavy-quark pair production at two loops in QCD
• A search for dark matter in events with one jet and missing transverse energy in pp-bar collisions at sqrt(s) = 1.96 TeV
• Search for supersymmetry using razor variables in events with b-tagged jets in pp collisions at sqrt(s) = 8 TeV
• Predictions for high energy neutrino cross-sections from the ZEUS global PDF fits
• Collider Physics at HERA
• Signals of New Physics in the Underlying Event
• Further search for supersymmetry at sqrt(s) = 7 TeV in final states with jets, missing transverse momentum and isolated leptons with the ATLAS detector
• Charge Symmetry at the Partonic Level
• Soft processes at the LHC, II: Soft-hard factorization breaking and gap survival
• Hadron production in pA collisions at the LHC from the Color Glass Condensate
• Higher-order soft corrections to squark hadro-production
• Parton Distribution Functions of Heavy Mesons on the Light Front
• Using Dimensional Reduction for Hadronic Collisions
• Small x gluon from exclusive J/psi production
• Analytic and "frozen" QCD coupling constants up to NNLO from DIS data
• Anomalous quartic ZZgammagamma couplings in gamma-proton collision at the LHC
• Weak interaction corrections to hadronic top quark pair production: contributions from quark-gluon and $b\bar{b}$ induced reactions
• Structure Functions
• Measurement of $d\sigma /dy$ of Drell-Yan $e^{+}{e}^{-}$ pairs in the $Z$ Mass Region from $p\bar{p}$ Collisions at $\sqrt{s}=1.96$ TeV
• NNLO predictions for Z-boson pair production at the LHC
• Azimuthal Asymmetry of pions in pp and pA collisions
• Anomalous WWgamma couplings in gamma-proton collision at the LHC
• Search for bottom squark pair production in proton--proton collisions at $\sqrt{s}=$13 TeV with the ATLAS detector
• PDF dependence of Higgs cross sections at the Tevatron and LHC: response to recent criticism
• Search for supersymmetry in events with $b$-tagged jets and missing transverse momentum in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Semi-inclusive photon-hadron production in pp and pA collisions at RHIC and LHC
• Electromagnetic properties of the neutrinos in gamma-proton collision at the LHC
• The Quark and Gluon Structure of the Proton
• Determination of Strange Sea Distributions from Neutrino-Nucleon Deep Inelastic Scattering
• Search for supersymmetry with a compressed mass spectrum in the vector boson fusion topology with 1-lepton and 0-lepton final states in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Search for high-mass resonances decaying into tau-lepton pairs in pp collisions at sqrt(s) = 7 TeV
• On the Consistent Use of Scale Variations in PDF Fits and Predictions
• Higgs Hadroproduction at Large Feynman x
• Nonsinglet parton distribution functions from the precise next-to-next-to-next-to leading order QCD fit
• Search for dark matter and supersymmetry with a compressed mass spectrum in the vector boson fusion topology in proton-proton collisions at sqrt(s) = 8 TeV
• Collinear and soft gluon corrections to Higgs production at NNNLO
• QCD coupling constant at NNLO from DIS data
• Measurement of CP Violation in Stop Cascade Decays at the LHC
• Early LHC measurements to check predictions for central exclusive production
• NNLO QCD contributions to the flavor non-singlet sector of ${\mathbf{F}}_2(\mathbf{x},{\mathbf{Q}}^2)$
• Measurement of the Top Pair Production Cross Section in the Dilepton Decay Channel in ppbar Collisions at sqrt s = 1.96 TeV
• Search for supersymmetry with a compressed mass spectrum in events with a soft $\tau$ lepton, a highly energetic jet, and large missing transverse momentum in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Status and Prospects of Top-Quark Physics
• Simplified TeV leptophilic dark matter in light of DAMPE data
• Top quark physics at the LHC
• Leptophilic dark matter in gauged $U(1{)}_{L_e-L_{\mu }}$ model in light of DAMPE cosmic ray $e^{+}+e^{-}$ excess
• Anomalous Wtb couplings in gamma-proton collision at the LHC
• Evaluation of the Theoretical Uncertainties in the Z to ll Cross Sections at the LHC
• Search for supersymmetry in the vector-boson fusion topology in proton-proton collisions at sqrt(s) = 8 TeV
• Dynamical parton distributions from DGLAP equations with nonlinear corrections
• Early spin determination at the LHC?
• Probing CP Violation with and without Momentum Reconstruction at the LHC
• Review of Properties of the Top Quark from Measurements at the Tevatron
• New parton distributions in fixed flavour factorization scheme from recent deep-inelastic-scattering data
• Photon-jet ridge at RHIC and the LHC
• Form factors and other measures of strangeness in the nucleon
• Di-photon "Ridge" in p+p and p+A collisions at RHIC and the LHC
• Diphoton production in high-energy p+A collisions
• Nuclear effects in F_3 structure function of nucleon
• Higher-order corrections to top-antitop pair and single top quark production
• Two-Loop QCD Helicity Amplitudes for (2+1)-Jet Production in Deep Inelastic Scattering
• Higgs Pair Production at the LHC and ILC from general potential
• Top Quark Physics at the Tevatron
• Cronin effect for protons and pions in pA collisions
• New type of parametrizations for parton distributions
• Prospects of measuring the CKM matrix element $|V_{ts}|$ at the LHC
• Q^2-evolution of the electric and magnetic polarizabilities of the proton
• Search for dark matter particles in proton-proton collisions at sqrt(s) = 8 TeV using the razor variables
• Improved sensitivity to charged Higgs searches in Top quark decays $t\to b{H}^{+}\to b({\tau }^{+}{\nu }_{\tau })$ at the LHC using $\tau$ polarisation and multivariate tecnniques
• Remarkable virtual SUSY effects in $W^{\pm }$ production at high energy hadron colliders
• New avenue to the Parton Distribution Functions: Self-Organizing Maps
• Applied High Energy QCD
• Genuine SUSY signatures from $ug\to \tilde d \tchi_i^+$ and $ug\to d{W}^{+}$, at high energies
• Photon parton distributions in nuclei and the EMC effect
• Probing the Frontiers of QCD
• Photoproduction of single inclusive jets at future ep colliders in next-to-leading order QCD
• Parton Distributions: Progress and Challenges
• Heavy-Flavor Production at Accelerators
• Theoretical Uncertainties in Electroweak Boson Production Cross Sections at 7, 10, and 14 TeV at the LHC
• Momentum reconstruction at the LHC for probing CP-violation in the stop sector
• CP-violation in SUSY cascades at the LHC
• Chiral expansion of moments of quark distributions
• MIT bag model inspired partonic transverse momentum distribution for prompt photon production in pp collisions
• NNPDF1.0 parton set for the LHC
• BFKL equation with running QCD coupling and HERA data
• Hard QCD at hadron colliders
• Status of MRST/MSTW PDF sets
• QCD Precision Measurements and Structure Function Extraction at a High Statistics, High Energy Neutrino Scattering Experiment: NuSOnG
• Top quark theory review for the Tevatron, LHC, and ILC
• Three- and Four-jet Production at Low x at HERA
• Amplitudes for $gg\to V{V}^{\prime }$ and their high energy SUSY constraints
• Tools for NNLO QCD Calculations
• Non-planar structure of analytical QCD predictions for the Gottfried sum rule
• Quark distributions and gluon contents of eta and etaprime
• Dynamical Parton Distributions of the Nucleon up to NNLO of QCD
• Status of Deeply Inelastic Parton Distributions
• LHC Probe of Quark Substructure at the Early Stages of Running
• Summary of the HERA-LHC workshop
• Parton distribution functions and strong coupling constant: MSHT
• Search for a neutral gauge boson with nonuniversal fermion couplings in vector boson fusion processes in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Measurement of the Structure of the Proton at HERA
• Implications of HERA measurements for LHC
• Partonic transverse momenta in non-relativistic hyper-central quark potential models
• Structure Functions and Low-x