Isovector unpolarized quark distribution in the nucleon in the large-N_c limit

Abstract

We calculate the isovector (flavor-nonsinglet) unpolarized quark- and antiquark distributions in the nucleon at a low normalization point in the large-N_c limit. The nucleon is described as a soliton of the effective chiral theory. The isovector distribution appears in the next-to-leading order of the 1/N_c-expansion. Numerical results for the quark- and antiquark distributions compare well with the parametrizations of the data at a low normalization point. This large-N_c approach gives a flavor asymmetry of the antiquark distribution (violation of the Gottfried sum rule) in good agreement with the measurements.

arXiv comment31 pages, LaTeX, 1 table, 4 figures included using epsf

References in corpus (11)

• Baryons as non-topological chiral solitons
• Measurement of the Light Antiquark Flavor Asymmetry in the Nucleon Sea
• Flavor Asymmetry of Antiquark Distributions in the Nucleon
• Nucleon Parton Distributions at Low Normalization Point in the Large N_c Limit
• Off-forward quark distributions of the nucleon in the large N_c limit
• Unpolarized and polarized quark distributions in the large-Nc limit
• dbar/ubar Asymmetry and the Origin of the Nucleon Sea
• Transverse Spin Distribution Function of Nucleon in Chiral Theory
• $1/N_c$ Rotational Corrections to $g_A$ and Isovector Magnetic Moment of the Nucleon
• Chiral Symmetry and the Nucleon Structure Functions
• Nucleon Structure Functions from a Chiral Soliton

Cited by in corpus (65)

• The Three-Loop Splitting Functions in QCD: The Non-Singlet Case
• Hard Exclusive Reactions and the Structure of Hadrons
• Improved Measurement of the $\bar{d}/\bar{u}$ Asymmetry in the Nucleon Sea
• Nucleon form-factors of the energy momentum tensor in the chiral quark-soliton model
• The Asymmetry of Antimatter in the Proton
• Novel Phenomenology of Parton Distributions from the Drell-Yan Process
• Transversity distributions in the nucleon in the large-N_c limit
• Chiral Symmetry and the Nucleon Spin Structure Functions
• Is gauge-invariant complete decomposition of the nucleon spin possible ?
• Polynomiality of unpolarized off-forward distribution functions and the D-term in the chiral quark-soliton model
• Collins effect in semi-inclusive deeply inelastic scattering and in electron positron annihilation
• Parton momentum and helicity distributions in the nucleon
• The generalized parton distribution function (E^u+E^d)(x,xi,t) of the nucleon in the chiral quark soliton model
• The pion mass dependence of the nucleon form-factors of the energy momentum tensor in the chiral quark-soliton model
• Hadron Structure Functions in a Chiral Quark Model: Regularization, Scaling and Sum Rules
• Light-flavor sea-quark distributions in the nucleon in the SU(3) chiral quark soliton model (I) -- phenomenological predictions --
• Are there approximate relations among transverse momentum dependent distribution functions?
• Generalized form factors, generalized parton distributions and the spin contents of the nucleon
• The chirally-odd twist-3 distribution function e(x) in the chiral quark-soliton model
• The generalized parton distribution functions and the nucleon spin sum rules in the chiral quark soliton model
• Quark distrbutions in the nucleon based on a relativistic 3-body approach to the NJL model
• Transverse momentum distributions of quarks in the nucleon from the Chiral Quark Soliton Model
• Polarized Structure Functions g_2 (x) in the Chiral Quark Soliton Model
• Pi N sigma-term and chiral-odd twist-3 distribution function e(x) of the nucleon in the chiral quark soliton model
• Spin-dependent twist-4 matrix elements from the instanton vacuum: Flavor-singlet and nonsinglet
• The Sea of Quarks and Antiquarks in the Nucleon: a Review
• Comparison of the Gottfried and Adler sum rules within the large-Nc expansion
• Structure of the nucleon at leading and subleading twist in the covariant parton model
• On the NuTeV anomaly and the asymmetry of the strange sea in the nucleon
• Azimuthal single spin asymmetries in SIDIS in the light of chiral symmetry breaking
• The sigma-term form factor of the nucleon in the large-Nc limit
• On the Chiral Quark Soliton Model with Pauli-Villars Regularization
• Phenomenology of the Flavor-Asymmetry in the Light-Quark Sea of the Nucleon
• Chiral-odd generalized parton distributions, transversity decomposition of angular momentum, and tensor charges of the nucleon
• Electromagnetic form factors of the baryon decuplet with flavor SU(3) symmetry breaking
• Do we expect light flavor sea-quark asymmetry also for the spin-dependent distribution functions of the nucleon?
• On the Momentum Dependence of the Flavor Structure of the Nucleon Sea
• Light flavor asymmetry of nucleon sea
• Sub-leading twist transverse momentum dependent parton distributions in the light-front quark-diquark model
• Sea flavor content of octet baryons and intrinsic five-quark Fock states
• Polynomiality of helicity off-forward distribution functions in the chiral quark-soliton model
• Twist-4 T-even proton TMDs in the light-front quark-diquark model
• Twist-4 contribution to unpolarized structure functions F_L and F_2 from instantons
• Flavor Structure of the Nucleon Sea
• Collinear parton distributions and the structure of the nucleon sea in a light-front meson-cloud model
• Flavor structure of the unpolarized and longitudinally-polarized sea-quark distributions in the nucleon
• Nucleon Structure Functions in the Three Flavor NJL Soliton Model
• Transversity distribution in spin asymmetries in semi-inclusive DIS and in the Drell-Yan process
• Transversity in the chiral quark--soliton model and single spin asymmetries
• Pion-Exchange and Fermi-Motion Effects on the Proton-Deuteron Drell-Yan Process
• Sea Quark Flavor Asymmetry of Hadrons in Statistical Balance Model
• The nucleon in the chiral quark model: an alternative computation scheme
• Axial-vector transition form factors of the baryon octet to the baryon decuplet with flavor SU(3) symmetry breaking
• A Constraint on the x Dependence of the Light Antiquarks Ratio
• 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
• Nucleon Structure Functions from the NJL-Model Chiral Soliton
• Non-singlet structure function of the 3He-3H system and divergence of the Gottfried integral
• Chiral Soliton Models and Nucleon Structure Functions
• Parton distributions in the chiral quark model: a continuum computation
• Sea quark transverse momentum distributions and dynamical chiral symmetry breaking
• Pions in isospin asymmetric nuclei
• Nucleon parton distributions from hadronic quantum fluctuations
• Recent developments in nucleon spin structure with focus on h_{1L}^{\perp} and pretzelosity h_{1T}^\perp
• The puzzle of the non-planar structure of the QCD contributions to the Gottfried sum rule
• Bayesian Monte Carlo extraction of sea asymmetry with SeaQuest and STAR data