Hard probes in heavy ion collisions at the LHC: PDFs, shadowing and $pA$ collisions

Abstract

This manuscript is the outcome of the subgroup ``PDFs, shadowing and $pA$ collisions'' from the CERN workshop ``Hard Probes in Heavy Ion Collisions at the LHC''. In addition to the experimental parameters for $pA$ collisions at the LHC, the issues discussed are factorization in nuclear collisions, nuclear parton distributions (nPDFs), hard probes as the benchmark tests of factorization in $pA$ collisions at the LHC, and semi-hard probes as observables with potentially large nuclear effects. Also, novel QCD phenomena in $pA$ collisions at the LHC are considered. The importance of the $pA$ program at the LHC is emphasized.

The writeup of the working group "PDFs, shadowing and $pA$ collisions" for the CERN Yellow Report on Hard Probes in Heavy Ion Collisions at the LHC, 121 pages. Subgroup convenors: K.J. Eskola, J.w. Qiu (theory) and W. Geist (experiment). Editor: K.J. Eskola

References in corpus (118)

• Rigorous QCD Analysis of Inclusive Annihilation and Production of Heavy Quarkonium
• Computing Quark and Gluon Distribution Functions for Very Large Nuclei
• Operator expansion for high-energy scattering
• Gluon Distribution Functions for Very Large Nuclei at Small Transverse Momentum
• Saturation Effects in Deep Inelastic Scattering at low $Q^2$ and its Implications on Diffraction
• Successive Combination Jet Algorithm For Hadron Collisions
• Three-jet cross sections to next-to-leading order
• Leading-twist Single-transverse-spin asymmetries: Drell-Yan and Deep-Inelastic Scattering
• Improved Parton Distributions from Global Analysis of Recent Deep Inelastic Scattering and Inclusive Jet Data
• Saturation in Diffractive Deep Inelastic Scattering
• Final-State Interactions and Single-Spin Asymmetries in Semi-Inclusive Deep Inelastic Scattering
• Transverse momentum and collision energy dependence of high $p_T$ hadron suppression in Au+Au collisions at ultrarelativistic energies
• Evidence from d+Au measurements for final-state suppression of high $p_T$ hadrons in Au+Au collisions at RHIC
• Unitarity at small Bjorken x
• Global QCD Analysis and the CTEQ Parton Distributions
• Deep-Inelastic Inclusive ep Scattering at Low x and a Determination of alpha_s
• Absence of Suppression in Particle Production at Large Transverse Momentum in sqrt(s_NN) = 200 GeV d+Au Collisions
• Non-Abelian Weizsacker-Williams field and a two-dimensional effective color charge density for a very large nucleus
• Color-octet quarkonia production II
• Tevatron Run-1 Z Boson Data and Collins-Soper-Sterman Resummation Formalism
• Factorization and high-energy effective action
• High-p_T Tomography of d+Au and Au+Au at SPS, RHIC, and LHC
• Unitarization of Gluon Distribution in the Doubly Logarithmic Regime at High Density
• A general approach to jet cross sections in QCD
• Quarkonium Feed-Down and Sequential Suppression
• pQCD-based Approach to Parton Production and Equilibration in High-Energy Nuclear Collisions
• Jet Tomography of Hot and Cold Nuclear Matter
• Parton Saturation at Small x and in Large Nuclei
• Solution to the evolution equation for high parton density QCD
• The Nonperturbative Regime in QCD Resummation for Gauge Boson Production at Hadron Colliders
• Inclusive Gluon Production in DIS at High Parton Density
• Quarkonium Production at High-Energy Colliders
• Centrality dependence of charged hadron transverse momentum spectra in d+Au collisions at sqrt(s_NN) = 200 GeV
• Measurement of J/Psi and Psi(2S) Polarization in ppbar Collisions at sqrt(s) = 1.8 TeV
• Jet photoproduction at HERA
• Polarization of Prompt J/psi at the Tevatron
• Quantum structure of the non-Abelian Weizsacker-Williams field for a very large nucleus
• Forward Quark Jets from Protons Shattering the Colored Glass
• Jet Tomography of Au+Au Reactions Including Multi-gluon Fluctuations
• A Dynamical Scaling Law for Jet Tomography
• Nuclear Deep-Inelastic Lepton Scattering and Coherence Phenomena
• Testing the Universality of Fragmentation Functions
• Determination of nuclear parton distributions
• Charged hadron transverse momentum distributions in Au+Au collisions at sqrt(s_NN) = 200 GeV
• Structure Functions are not Parton Probabilities
• New Scaling at High Energy DIS
• Coherent Nuclear Diffractive Production of Minijets - Illuminating Color Transparency
• The Transverse Momentum and Total Cross Section of E+ E- Pairs in the Z-Boson Region from P Anti-P Collisions at s**(1/2) = 1.8-Tev
• Shadowing in Inelastic Scattering of Muons on Carbon, Calcium and Lead at Low XBj
• Gluon Shadowing and Hadron Production at RHIC
• HERA Collider Physics
• Heavy-Quark Production
• Role of the nonperturbative input in QCD resummed Drell-Yan $Q_T$-distributions
• Parton densities and dipole cross-sections at small x in large nuclei
• A simple model for nuclear structure functions at small $x$ in the dipole picture
• The A Dependence of Open Charm and Bottom Production
• Two-gluon form factor of the nucleon and $J/\psi$ photoproduction
• QCD prediction for heavy boson transverse momentum distributions
• Reaction Operator Approach to Multiple Elastic Scatterings
• Where is the jet quenching in Pb+Pb collisions at 158 AGeV?
• Dilepton production from the Color Glass Condensate
• Operator Expansion for Diffractive High-Energy Scattering
• Differential Cross Section for Higgs Boson Production Including All-Orders Soft Gluon Resummation
• Jet broadening in deeply inelastic scattering
• Measuring Double Parton Distributions in Nucleons at Proton-Nucleus Colliders
• Energy Loss versus Shadowing in the Drell-Yan Reaction on Nuclei
• Are the $J/\psi$ and ${\chi }_{c}A$ Dependencies the Same?
• Obtaining the nuclear gluon distribution from heavy quark decays to lepton pairs in p$A$ collisions
• Energy loss of fast quarks in nuclei
• Shadowing Effects on Vector Boson Production
• Diffractive Photoproduction of ${\rm Y}$ at HERA
• Interplay of soft and hard processes and hadron $p_T$ spectra in $pA$ and $AA$ collisions
• Sivers vs. Collins effect in azimuthal single spin asymmetries in pion production in SIDIS
• Geometric scaling in inclusive e A reactions and nonlinear perturbative QCD
• The Ratio of Gluon Distributions in Sn and C
• QCD Factorized Drell-Yan Cross Section at Large Transverse Momentum
• QCD in Nuclear Collisions
• Determining the existence and nature of the quark-gluon plasma by Upsilon suppression at the LHC
• Energy loss effects on heavy quark production in heavy-ion collisions at $\sqrt{s}=5.5$ $A$TeV
• Scaling Variable for Nuclear Shadowing in Deep-Inelastic Scattering
• Partonic Picture of Nuclear Shadowing at Small x
• Minijet transverse spectrum in high-energy hadron-nucleus collisions
• Differential cross section for W boson production as a function of transverse momentum in proton-antiproton collisions at 1.8 TeV
• Color coherent phenomena on nuclei and the QCD evolution equation
• Decisive Role of Fragmentation Functions in Hard Hadron Production
• Measuring centrality with slow protons in proton-nucleus collisions at the AGS
• Parton Saturation-An Overview
• Leptonic Observables in Ultra-Relativistic Heavy Ion Collisions
• Probing the medium-induced energy loss of bottom quarks by dimuon production in heavy ion collisions at LHC
• Quarkonium Production through Hard Comover Scattering. II
• TEVATRON-HERA Colour-Octet Charmonium Anomaly Versus Higher-Order QCD Effects
• Z Production as a Test of Nuclear Effects at the LHC
• Strong nuclear enhancement in intermediate mass Drell-Yan production
• Charm and Bottom Quark Production Cross Sections Near Threshold
• Nuclear enhanced power corrections to DIS structure functions
• Nuclear Shadowing in a Parton Recombination Model: Q${}^2$ Variation
• Structure functions and parton distributions
• A Dynamical Model for Nuclear Structure Functions
• Rescattering Effects in Quarkonium Production
• Nuclear beams in HERA
• Leading order pQCD hadron production and nuclear modification factors at RHIC and the LHC
• Electron-Nucleus Collisions at THERA
• Coulomb induced diffraction of energetic hadrons into jets
• Initial conditions and charged multiplicities in ultra-relativistic heavy-ion collisions
• On the jet spectrum in nucleus-nucleus interactions
• A geometrical estimation of saturation of partonic densities
• Heavy Quark Production at the TEVATRON in the Semihard QCD Approach and the Unintegrated Gluon Distribution
• Nonlinear corrections to the DGLAP equations; looking for the saturation limits
• Central rapidity densities of charged particles at RHIC and LHC
• Nuclear Effects on Heavy Boson Production at RHIC and LHC
• Diffraction at HERA, Color Opacity and Nuclear Shadowing
• High-pT Neutral Pion Production in Heavy Ion Collisions at SPS and RHIC
• The EMC effect at low x in perturbative QCD
• Diffraction Dissociation in QCD and Light-Cone Wavefunctions
• High-energy interaction with the nucleus in the perturbative QCD with $N_c\to \infty$
• Comments on parton saturation at small x in large nuclei
• Transverse Momentum of Psi and Dimuon Production in Pb+Pb Collisions
• Comover Enhancement of Quarkonium Production

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• Quark-Gluon Matter
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• Study of Higgs boson production and its b-bbar decay in gamma-gamma processes in proton-nucleus collisions at the LHC
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• A global reanalysis of nuclear parton distribution functions
• Photon tagged correlations in heavy ion collisions
• Measuring gluon shadowing with prompt photons at RHIC and LHC
• Prospects for quarkonium studies at the high-luminosity LHC
• Enhancement of charm quark production due to nonlinear corrections to the DGLAP equations
• Probing small-$x$ gluons by low-mass Drell-Yan pairs at colliders
• D meson production in d+Au process using a perturbative approach
• Heavy Ion Physics at the LHC
• Hard Probes at LHC
• Opportunities for Heavy Ion Physics at the Large Hadron Collider LHC