Spin-dependent structure functions of nuclei in the meson-nucleon theory

Kaptari, L. P.; Umnikov, A. Yu.; Atti, C. Ciofi degli; Scopetta, Sergio; Kazakov, K.Yu.

doi:10.1103/physrevc.51.52

Cited by 15 publications

(5 citation statements)

References 50 publications

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“…Results and applications to spin structure functions of the deuteron and 3 He are discussed in Refs. [213,255,267,270]. As a general rule, the structure functions at x < 0.7 are well described using simply the effective nucleon polarizations (7.4,7.5,7.6).…”

Section: Shadowing In G Dmentioning

confidence: 96%

Nuclear deep-inelastic lepton scattering and coherence phenomena

Piller¹,

Weise²

2000

Physics Reports

176

241

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This review outlines our present experimental knowledge and theoretical understanding of deepinelastic scattering on nuclear targets. The emphasis is primarily on nuclear coherence phenomena, such as shadowing, where the key physics issue is the exploration of hadronic and quark-gluon fluctuations of a high-energy virtual photon and their passage through the nuclear medium. New developments in polarized deep-inelastic scattering on nuclei are also discussed, and more conventional binding and Fermi motion effects are summarized. The report closes with a brief outlook on vector meson electroproduction, nuclear shadowing at very large Q 2 and the physics of high parton densities in QCD.

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Section: Shadowing In G Dmentioning

confidence: 96%

Nuclear deep-inelastic lepton scattering and coherence phenomena

Piller¹,

Weise²

2000

Physics Reports

176

241

View full text Add to dashboard Cite

show abstract

“…Similarly, potential off-shell effects (due to the negative binding energy of nucleons inside deuterium), including perhaps a modification of the nucleon structure (the EMC effect) and non-nucleonic degrees of freedom (mesons [50], ∆∆ components [51,52] and perhaps more exotic quark structures [53]) may play a role. Since no universally accepted model for these effects exists, we present our results with the caveat that they are for bound neutrons only.…”

Section: G From Nucleons To the Deuteronmentioning

confidence: 99%

Precise determination of the deuteron spin structure at low to moderateQ2with CLAS and extraction of the neutron contribution

Guler¹,

Fersch²,

Kuhn³

et al. 2015

Phys. Rev. C

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Precise determination of the deuteron spin structure at low to moderate Q^{2} with CLAS and extraction of the neutron contribution We present the final results for the deuteron spin structure functions obtained from the full data set collected with Jefferson Lab's CLAS in 2000-2001. Polarized electrons with energies of 1.6, 2.5, 4.2 and 5.8 GeV were scattered from deuteron ( 15 ND3) targets, dynamically polarized along the beam direction, and detected with CLAS. From the measured double spin asymmetry, the virtual photon absorption asymmetry A d 1 and the polarized structure function g d 1 were extracted over a wide kinematic range (0.05 GeV 2 < Q 2 < 5 GeV 2 and 0.9 GeV < W < 3 GeV). We use an unfolding procedure and a parametrization of the corresponding proton results to extract from these data the polarized structure functions A n 1 and g n 1 of the (bound) neutron, which are so far unknown in the resonance region, W < 2 GeV. We compare our final results, including several moments of the deuteron and neutron spin structure functions, with various theoretical models and expectations as well as parametrizations of the world data. The unprecedented precision and dense kinematic coverage of these data can aid in future extractions of polarized parton distributions, tests of perturbative QCD predictions for the quark polarization at large x, a better understanding of quark-hadron duality, and more precise values for higher-twist matrix elements in the framework of the Operator Product Expansion.

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“…On the other hand, no universal model of the effects of FSI over the whole kinematic region covered by our data is available; we therefore do not correct for those effects. Similarly, potential off-shell effects (due to the negative binding energy of nucleons inside deuterium), including perhaps a modification of the nucleon structure (the EMC effect) and non-nucleonic degrees of freedom (mesons [50], ∆∆ components [51,52] and perhaps more exotic quark structures [53]) may play a role. Since no universally accepted model for these effects exists, we present our results with the caveat that they are for bound neutrons only.…”

Section: G From Nucleons To the Deuteronmentioning

confidence: 99%

Precise Determination of the Deuteron Spin Structure at Low to Moderate $Q^2$ with CLAS and Extraction of the Neutron Contribution

Guler,

Fersch,

Kuhn

et al. 2015

Preprint

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We present the final results for the deuteron spin structure functions obtained from the full data set collected with Jefferson Lab 's CLAS in 2000's CLAS in -2001 Polarized electrons with energies of 1.6, 2.5, 4.2 and 5.8 GeV were scattered from deuteron ( 15 ND3) targets, dynamically polarized along the beam direction, and detected with CLAS. From the measured double spin asymmetry, the virtual photon absorption asymmetry A d 1 and the polarized structure function g d 1 were extracted over a wide kinematic range (0.05 GeV 2 < Q 2 < 5 GeV 2 and 0.9 GeV < W < 3 GeV). We use an unfolding procedure and a parametrization of the corresponding proton results to extract from these data the polarized structure functions A n 1 and g n 1 of the (bound) neutron, which are so far unknown in the resonance region, W < 2 GeV. We compare our final results, including several moments of the deuteron and neutron spin structure functions, with various theoretical models and expectations as well as parametrizations of the world data. The unprecedented precision and dense kinematic coverage of these data can aid in future extractions of polarized parton distributions, tests of perturbative QCD predictions for the quark polarization at large x, a better understanding of quark-hadron duality, and more precise values for higher-twist matrix elements in the framework of the Operator Product Expansion.

show abstract

Spin-dependent structure functions of nuclei in the meson-nucleon theory

Cited by 15 publications

References 50 publications

Nuclear deep-inelastic lepton scattering and coherence phenomena

Nuclear deep-inelastic lepton scattering and coherence phenomena

Precise determination of the deuteron spin structure at low to moderateQ2with CLAS and extraction of the neutron contribution

Precise Determination of the Deuteron Spin Structure at Low to Moderate $Q^2$ with CLAS and Extraction of the Neutron Contribution

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