Nuclear effects on the extraction of neutron structure functions

Schmidt, Iván; Yang, Jianjun

doi:10.1007/s100520100647

Cited by 7 publications

(8 citation statements)

References 30 publications

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“…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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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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“…Another important advantage of W production in p + p collision is the absence of nuclear effects. As noted by several authors [247,248,249,250,251], the nuclear modification of parton distributions should be taken into account for DIS and Drell-Yan process involving deuterium targets. The nuclear shadowing effect for deuteron could lead to a 4% to 10% decrease in the evaluation of the Gottfried integral by the NMC [247,250].…”

Section: D/ū From W Productionmentioning

confidence: 99%

Novel phenomenology of parton distributions from the Drell–Yan process

Peng

Qiu

2014

Progress in Particle and Nuclear Physics

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The Drell-Yan massive lepton-pair production in hadronic collisions provides a unique tool complementary to the Deep-Inelastic Scattering for probing the partonic substructures in hadrons. We review key concepts, approximations, and progress for QCD factorization of the Drell-Yan process in terms of collinear or transverse momentum dependent (TMD) parton distribution functions. We present experimental results from recent fixed-target Drell-Yan as well as W and Z boson production at colliders, focussing on the topics of flavor structure of the nucleon sea as well as the extraction of novel Sivers and Boer-Mulders functions via single transverse spin asymmetries and azimuthal lepton angular distribution of the Drell-Yan process. Prospects for future Drell-Yan experiments are also presented.

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“…Since the discovery of the EMC effect [7] in deep inelastic muon-nucleus scattering, various models [8,9] have been proposed for its explanation. In our present work, we choose one of the successful EMC models usually referred as the extended x−rescaling model [4].…”

Section: A Nuclear Parton Distributions In the Extended X−rescaling mentioning

confidence: 99%

Nuclear effects on the extraction of sin2θ

Kovalenko¹,

Schmidt²,

Yang³

2002

Physics Letters B

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We study the impact of nuclear effects on the extraction of the weak-mixing angle sin 2 θ W from deep inelastic (anti-)neutrino-nucleus scattering, with special emphasis on the recently announced NuTeV Collaboration 3σ deviation of sin 2 θ W from its standard model value. We have found that nuclear effects, which are very important in electromagnetic deep inelastic scattering (DIS), are quite small in weak charged current DIS. In neutral current DIS processes, which contain the weak mixing angle, we predict that these effects play also an important role and may dramatically affect the value of sin 2 θ W extracted from the experimental data.

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Nuclear effects on the extraction of neutron structure functions

Cited by 7 publications

References 30 publications

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 moderateQ2with CLAS and extraction of the neutron contribution

Novel phenomenology of parton distributions from the Drell–Yan process

Nuclear effects on the extraction of sin2θ

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