Chiral symmetry and the nucleon structure functions

Wakamatsu, M.; Kubota, Takanori

doi:10.1103/physrevd.57.5755

Cited by 67 publications

(130 citation statements)

References 37 publications

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“…By now, various effective models of QCD in the low energy region have employed the soliton picture of the baryon: the Skyrme model [4,5,6,7,8,9], the Nambu-Jona-Lasinio (NJL) model [10,11,12] and the chiral quark soliton model (CQSM) [13,14,15,16]. The static properties (mass, magnetic moment) [17,18,19] and the quark distribution functions [20,21,22] of the baryon have been studied by means of these models. Here, the baryon appears as a rotational band of the soliton [5].…”

Section: Introductionmentioning

confidence: 99%

Instability of the hedgehog shape for the octet baryon in the chiral quark soliton model

Akiyama

Futami

2003

Phys. Rev. D

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In this paper the stability of the hedgehog shape of the chiral soliton is studied for the octet baryon with the SU(3) chiral quark soliton model. The strangeness degrees of freedom are treated by a simplified bound-state approach, which omits the locality of the kaon wave function. The mean field approximation for the flavor rotation is applied to the model. The classical soliton changes shape according to the strangeness. The baryon appears as a rotational band of the combined system of the deformed soliton and the kaon.

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Section: Introductionmentioning

confidence: 99%

Instability of the hedgehog shape for the octet baryon in the chiral quark soliton model

Akiyama

Futami

2003

Phys. Rev. D

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“…The effects are large, perhaps too large for favorable comparison with experiment, and soliton rotation was not considered in the derivation (Wakamatsu and Kubota, 1998). While the alternative of merely neglecting the support problem is not meritorious, the prescription of Eq.…”

Section: Topological Soliton Modelsmentioning

confidence: 99%

Nucleon and pion distribution functions in the valence region

2010

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We provide an experimental and theoretical perspective on the behavior of unpolarized distribution functions for the nucleon and pion on the valence-quark domain; namely, Bjorken-x > ∼ 0.4. This domain is key to much of hadron physics; e.g., a hadron is defined by its flavor content and that is a valence-quark property. Furthermore, its accurate parametrization is crucial to the provision of reliable input for large collider experiments. We focus on experimental extractions of distribution functions via electron and muon inelastic scattering, and from Drell-Yan interactions; and on theoretical treatments that emphasize an explanation of the distribution functions, providing an overview of major contemporary approaches and issues. Valence-quark physics is a compelling subject, which probes at the heart of our understanding of the Standard Model. There are numerous outstanding and unresolved challenges, which experiment and theory must confront. In connection with experiment, we explain that an upgraded Jefferson Lab facility is well-suited to provide new data on the nucleon, while a future electron ion collider could provide essential new data for the mesons. There is also great potential in using Drell-Yan interactions, at FNAL, J-PARC and GSI, to push into the large-x domain for both mesons and nucleons. We argue furthermore that explanation, in contrast to modeling and parametrization, requires a widespread acceptance of the need to adapt theory: to the lessons learnt already from the methods of nonperturbative quantum field theory; and a fuller exploitation of those methods. * Electronic address: holt@anl.gov † Electronic address: cdroberts@anl.gov

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“…• In the chiral-quark soliton model [124,125], QCD at the large N c limit becomes an effective theory of mesons with the baryons appearing as solitons. Quarks are described by single particle wave functions, which are solutions of the Dirac equation in the field of the background pions.…”

Section: Theoretical Predictions On the Asymmetry Between ∆ū(X) And ∆mentioning

confidence: 99%

Flavor structure of the nucleon sea

Peng

2003

Eur. Phys. J. A

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We review the current status and future prospects on the subject of flavor structure of the nucleon sea. The flavor structure of the nucleon sea provides unique information on the nonperturbative aspects of strong interactions allowing stringent tests of various models on the partonic structures of the nucleons as well as lattice QCD calculations. The scope of this review covers the unpolarized, polarized, and the transverse-momentum dependent sea-quark distributions of the nucleons. While the main focus of this review is on the physics motivation and recent progress on the subject of the nucleon sea, we also discuss future prospects of addressing some outstanding issues on the flavor structure of the nucleon sea.

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Chiral symmetry and the nucleon structure functions

Cited by 67 publications

References 37 publications

Instability of the hedgehog shape for the octet baryon in the chiral quark soliton model

Instability of the hedgehog shape for the octet baryon in the chiral quark soliton model

Nucleon and pion distribution functions in the valence region

Flavor structure of the nucleon sea

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