Flavor Asymmetry of Antiquark Distributions in the Nucleon

Abstract

1. Introduction 2. Possible violation of the Gottfried sum rule 2.1 Gottfried sum rule 2.2 Early experimental results 2.3 NMC finding and recent progress 2.4 Small $x$ contribution 2.5 Nuclear correction: shadowing in the deuteron 2.6 Parametrization of antiquark distributions 3 Expectations in perturbative QCD 3.1 Operator product expansion 3.2 Perturbative correction to the Gottfried sum 4 Theoretical ideas for the sum-rule violation 4.1 Lattice QCD 4.2 Pauli exclusion principle 4.3 Mesonic models 4.3.1 Meson-cloud contribution 4.3.2 Chiral models 4.3.3 Anomalous $Q^2$ evolution 4.4 Diquark model 4.5 Isospin symmetry violation 4.6 Flavor asymmetry ubar-dbar in nuclei 4.7 Relation to nucleon spin 4.8 Comment on effects of quark mass and transverse motion 5 Finding the flavor asymmetry ubar-dbar in various processes 5.1 Drell-Yan process 5.1.1 Fermilab-E866 results 5.2 W and Z production 5.3 Quarkonium production at large $x_{{}_F}$ 5.4 Charged hadron production 5.5 Neutrino scattering 5.6 Experiments to find isospin symmetry violation 6 Related topics on antiquark distributions 7 Summary and outlook

3+79 pages, LATEX2e, 29 eps figures. Physics Reports in press. Complete postscript file is available at http://www.cc.saga-u.ac.jp/saga-u/riko/physics/quantum1/structure.html Email: [email protected]

References in corpus (5)

• Measurement of the Light Antiquark Flavor Asymmetry in the Nucleon Sea
• Chiral Quark Model of Nucleon Spin-Flavor Structure with SU(3) and Axial-U(1) Breakings
• The Flavor Asymmetry of the Nucleon Sea
• Nonvanishing tensor polarization of sea quarks in polarized deuterons
• Polarized deuteron structure functions at small x

Cited by in corpus (172)

• Models for the Polarized Parton Distributions of the Nucleon
• Improved Measurement of the $\bar{d}/\bar{u}$ Asymmetry in the Nucleon Sea
• The Physics of the B Factories
• Extraction of Spin-Dependent Parton Densities and Their Uncertainties
• Determination of nuclear parton distribution functions and their uncertainties at next-to-leading order
• Quark helicity distributions in the nucleon for up, down, and strange quarks from semi--inclusive deep--inelastic scattering
• Determination of fragmentation functions and their uncertainties
• Distribution Functions of the Nucleon and Pion in the Valence Region
• Determination of nuclear parton distributions
• Polarized Parton Distribution Functions in the Nucleon
• Nuclear parton distribution functions and their uncertainties
• Chiral extrapolation of lattice moments of proton quark distributions
• Flavor Asymmetry of Light Quarks in the Nucleon Sea
• Determination of polarized parton distribution functions and their uncertainties
• Global analysis of nuclear parton distribution functions and their uncertainties at next-to-next-to-leading order
• New limits on intrinsic charm in the nucleon from global analysis of parton distributions
• Strange quark suppression from a simultaneous Monte Carlo analysis of parton distributions and fragmentation functions
• Novel Phenomenology of Parton Distributions from the Drell-Yan Process
• Phenomenology of nonperturbative charm in the nucleon
• Dynamical Symmetry Breaking in the Sea of the Nucleon
• Determination of gluon polarization from deep inelastic scattering and collider data
• Isovector unpolarized quark distribution in the nucleon in the large-N_c limit
• Is the Sullivan Process Compatible with QCD Chiral Dynamics?
• Unquenched quark model for baryons: magnetic moments, spins and orbital angular momenta
• High-Energy Hadron-Induced Dilepton Production from Nucleons and Nuclei
• Parton momentum and helicity distributions in the nucleon
• Determination of polarized parton distribution functions with recent data on polarization asymmetries
• Moments of Isovector Quark Distributions from Lattice QCD
• Do the E866 Drell Yan data change our picture of the chiral structure of the nucleon ?
• Flavor Asymmetry of the Nucleon Sea and the Five-Quark Components of the Nucleons
• Flavor Structure of the Nucleon Sea
• Charge Symmetry at the Partonic Level
• Virtual meson cloud of the nucleon and generalized parton distributions
• Light-flavor sea-quark distributions in the nucleon in the SU(3) chiral quark soliton model (I) -- phenomenological predictions --
• Quark Structure of $\Lambda$ from $\Lambda$-Polarization in Z Decays
• The chirally-odd twist-3 distribution e(x)
• Flavor and Spin Structure of $\Lambda$-Baryon at Large x
• Constructing Parton Convolution in Effective Field Theory
• Pion structure function from leading neutron electroproduction and SU(2) flavor asymmetry
• $\bar{d}-\bar{u}$ asymmetry in the proton in chiral effective theory
• Pion momentum distributions in the nucleon in chiral effective theory
• Parton Distributions for the Octet and Decuplet Baryons
• The quark - antiquark asymmetry of the strange sea of the nucleon
• Tensor-polarized structure function $b_1$ in the standard convolution description of the deuteron
• Chiral dynamics and the growth of the nucleon's gluonic transverse size at small x
• Detailed Balance and Sea-Quark Flavor Asymmetry of Proton
• Measurement of the longitudinal spin asymmetries for weak boson production in proton-proton collisions at $\sqrt{s}$ = 510 GeV
• Quark distrbutions in the nucleon based on a relativistic 3-body approach to the NJL model
• Structure functions in the polarized Drell-Yan processes with spin-1/2 and spin-1 hadrons: II. parton model
• Novel two-to-three hard hadronic processes and possible studies of generalized parton distributions at hadron facilities
• Charting the coming synergy between lattice QCD and high-energy phenomenology
• Axial vector diquark correlations in the nucleon: Structure functions and static properties
• Polarized light-antiquark distributions in a meson-cloud model
• Structure functions in the polarized Drell-Yan processes with spin-1/2 and spin-1 hadrons: I. general formalism
• Towards a Unified Model of Neutrino-Nucleus Reactions for Neutrino Oscillation Experiments
• Transverse-momentum-dependent parton distribution functions up to twist 4 for spin-1 hadrons
• Chiral dynamics and partonic structure at large transverse distances
• Omega Meson Cloud and the Proton's Light Anti-Quark Distribution
• Tensor-polarized quark and antiquark distribution functions in a spin-one hadron
• Principle of Balance and the Sea Content of the Proton
• Exotic Hadrons Of Minimal Pentaquark ($qqqq\Bar{Q}$) States
• QCD Spin Physics: Partonic Spin Structure of the Nucleon
• Strange quark asymmetry in the proton in chiral effective theory
• Non-perturbative structure of the polarized nucleon sea
• Nuclear physics with a medium-energy Electron-Ion Collider
• Anatomy of relativistic pion loop corrections to the electromagnetic nucleon coupling
• Quark asymmetries in the proton from a model for parton densities
• The Sea of Quarks and Antiquarks in the Nucleon: a Review
• Comparison of the Gottfried and Adler sum rules within the large-Nc expansion
• Parton distributions from nonlocal chiral SU(3) effective theory. I. Splitting functions
• Nonperturbative versus perturbative effects in generalized parton distributions
• Mapping the Proton's Fluctuating Waistline
• Theoretical estimate on tensor-polarization asymmetry in proton-deuteron Drell-Yan process
• Evolution Equations for Connected and Disconnected Sea Parton Distributions
• Polarized rho mesons and the asymmetry between Delta d^bar(x) and Delta u^bar(x) in the sea of the nucleon
• Phenomenology of the Flavor-Asymmetry in the Light-Quark Sea of the Nucleon
• Re-evaluation of the Gottfried sum using neural networks
• Do we expect light flavor sea-quark asymmetry also for the spin-dependent distribution functions of the nucleon?
• Parton Distribution of Proton in a Simple Statistical Model
• The $bard-\bar{u}$ asymmetry of the proton in a Pion Cloud Model approach
• The Quark Distributions in the Σ^+ Hyperon
• Nuclear effects in the proton-deuteron Drell-Yan process
• Sea quark contents of octet baryons
• Light flavor asymmetry of nucleon sea
• Charge symmetry violation in the parton distributions of the nucleon
• On the Momentum Dependence of the Flavor Structure of the Nucleon Sea
• Gluon saturation and Feynman scaling in leading neutron production
• Sea flavor content of octet baryons and intrinsic five-quark Fock states
• The Role of Polarized Valons in the Flavor Symmetry Breaking of Nucleon Sea
• Polarized antiquark flavor asymmetry: Pauli blocking vs. the pion cloud
• Order ${\alpha }_s^2$ perturbative QCD corrections to the Gottfried sum rule
• On the extraction of the intrinsic light-quark sea in the proton
• Flavor Structure of the Nucleon Sea
• Collinear parton distributions and the structure of the nucleon sea in a light-front meson-cloud model
• High--Energy Photon--Hadron Scattering in Holographic QCD
• Flavor and Charge Symmetry in the Parton Distributions of the Nucleon
• Strange sea distributions of the nucleon
• Clustering aspects in nuclear structure functions
• Flavor structure of the unpolarized and longitudinally-polarized sea-quark distributions in the nucleon
• Hadron Physics at J-PARC
• Low $Q^2$ proton structure function, using gluon and pseudoscalar meson clouds in the constituent quark framework
• Parton distributions in the proton and pion
• Flavor and Spin Structure of Octet Baryons at Large x
• Transverse spin effects of sea quarks in unpolarized nucleons
• On the energy dependence of the D^+/D^- production asymmetry
• Orbital Angular Momentum in the Nucleon
• Sigma Meson Cloud and Proton's Light Flavor Sea Quarks
• Measurement of flavor asymmetry of light-quark sea in the proton with Drell-Yan dimuon production in $p+p$ and $p+d$ collisions at 120 GeV
• Does the $D^{-}/D^{+}$ production asymmetry decrease at large $x_F$?
• Intrinsic strange distributions in the nucleon from the light-cone models
• Testing the Meson Cloud Model in Inclusive Meson Production
• Moments of Isovector Quark Distributions in Lattice QCD
• Projections of structure functions in a spin-one hadrons
• Physics of the Nucleon Sea Quark Distributions
• Deep inelastic scattering on asymmetric nuclei
• Tensor-polarized structure functions: Tensor structure of deuteron in 2020's
• Nuclear corrections of parton distribution functions
• Evaluation of the isospin asymmetry of the nucleon structure functions with CLAS++
• EMC effect in the next-to-leading order approximation based on the Laplace transformation
• Extraction of the neutron F2 structure function from inclusive proton and deuteron deep-inelastic scattering data
• Transversity distributions and Drell-Yan spin asymmetries
• Parton distribution functions and fragmentation functions of spin-1 hadrons
• Sea Quark Flavor Asymmetry of Hadrons in Statistical Balance Model
• Pion-Exchange and Fermi-Motion Effects on the Proton-Deuteron Drell-Yan Process
• Polarized light-flavor antiquarks from Drell-Yan processes of h+\vec{N}\to\vec{l^{+-}} + l^{-+} + X
• Structure Functions of Unstable Lithium Isotopes
• The flavour asymmetry and quark-antiquark asymmetry in the ${\Sigma }^{+}$-sea
• Pions in isospin asymmetric matter and nuclear Drell-Yan scattering
• Improved determination of $\bar{d}(x)-\bar{u}(x)$ flavor asymmetry in the proton by BONuS experiment at JLAB and using an approach by Brodsky, Hoyer, Peterson, and Sakai
• Flavor Asymmetry of the Nucleon Sea and W Boson Production
• Asymmetry of Strange Sea in Nucleons
• Phenomenological analysis of nucleon strangeness and meson-nucleon sigma terms
• The spin dependent structure functions of the nucleon
• On Reconciling Gottfried Sum Rule Violation with Cabibbo Theory
• $\bar{d}-\bar{u}$ asymmetry and semi-inclusive production of pions in DIS
• Multi-quark components in baryons
• Plans for Hadronic Structure Studies at J-PARC
• Light quark distributions in the proton sea
• Pion-production cross sections in neutrino reactions for studying generalized parton distributions of the nucleon
• Coordinate Space Distributions of Antiquark Flavor Asymmetries in the Proton
• Flavor asymmetry from the non-perturbative nucleon sea
• Non-singlet structure function of the 3He-3H system and divergence of the Gottfried integral
• Valence and sea quarks in the nucleon
• Study of the $s-\bar{s}$ asymmetry in the proton
• Can sea quark asymmetry shed light on the orbital angular momentum of the proton?
• Polarized proton-deuteron Drell-Yan processes and parton distributions
• Extraction of Polarized Gluon Distributions from Large-pt Light Hadron Pair Production
• The Quark Distributions of Baryons
• Test of CDF dijet anomaly within the standard model
• Nuclear effects in deep inelastic scattering and transition region
• Pions in isospin asymmetric nuclei
• Summary of the 'Diffraction and Vector Mesons' working group at DIS06
• Sea quark polarization and semi-inclusive DIS data
• A model prediction for polarized antiquark flavor asymmetry
• Symmetry restoration of the soft pion corrections for the light sea quark distributions in the small $x$ region
• Structure functions of the nucleon and nuclei in neutrino reactions
• Gottfried sum rule from maximum entropy method quark distributions with DGLAP evolution and DGLAP evolution with GLR-MQ-ZRS corrections
• Nucleon parton distributions from hadronic quantum fluctuations
• Old and new parton distribution and fragmentation functions
• Flavor asymmetry of the nucleon sea in an unquenched quark model
• Recent developments in the constituent quark model including quark-antiquark pairs
• Polarized Parton Distributions and the Polarized Gluon Asymmetry
• Evolution of Structure Functions And Their Moments In Chiral Field Theory
• Baryons in the unquenched quark model
• Determining the strange and antistrange quark distributions of the nucleon
• Progress on nuclear modifications of structure functions
• Generalized parton distributions of the nucleon in constituent quark models
• Sea Quark Asymmetries in the Nucleon - A physical model for parton distributions in hadrons
• Flavor symmetry breaking of the nucleon sea in the statistical approach
• Studies of parton distributions at a neutrino factory
• Structure functions in polarized proton-deuteron Drell-Yan processes
• Bayesian Monte Carlo extraction of sea asymmetry with SeaQuest and STAR data