Final-state interactions in inclusive deep-inelastic scattering from the deuteron

Cosyn, Wim; Melnitchouk, Wally; Sargsian, Misak

doi:10.1103/physrevc.89.014612

Cited by 19 publications

(20 citation statements)

References 60 publications

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“…The results will be further affected to some extent by Final State Interaction (FSI) effects that are presently unknown. They have been estimated to be small in the DIS region [10] but may be larger in some part of the kinematic region covered by the data reported here. In the following, we quote results for the bound neutron without correcting for such FSI effects.…”

Section: Introductionmentioning

confidence: 74%

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: Introductionmentioning

confidence: 74%

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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“…In Ref. 81, we studied inclusive FSI for the deuteron target, based on the above outlined VNA/GEA approximation, using rescattering parameters obtained from the comparison with the Deeps data (Sec. 3.2) as an input.…”

Section: Final-state Interactions In Inclusive Dismentioning

confidence: 99%

“…3.2) as an input. The theoretical formalism for computation of the FSI contribution to the inclusive DIS cross-section is based on the application of the optical theorem which allows to relate the hadronic tensor of inclusive nuclear scattering, b W µν D to the imaginary part of the forward nuclear Compton scattering amplitude A µν γ * A (t = 0) as follows 81 :…”

Section: Final-state Interactions In Inclusive Dismentioning

confidence: 99%

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Nuclear final-state interactions in deep inelastic scattering off the lightest nuclei

Cosyn

Sargsian

2017

Int. J. Mod. Phys. E

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We review recent progress in studies of nuclear final-state interactions in deep inelastic scattering (DIS) off the lightest nuclei tagged by a recoil nucleon. These processes hold a lot of potential for resolving the outstanding issues related to the dynamics of hadronization in QCD. Within the minimal Fock component framework, valid at large Bjorken x, the main features of the theoretical approach based on the virtual nucleon approximation are elaborated. In this approach, the strong final-state interaction of the DIS products with the nuclear fragments is described by an effective eikonal amplitude, whose parameters can be extracted from the analysis of semi-inclusive DIS off the deuteron target. The extraction of the Q 2 and W mass dependences of these parameters gives a new observable in studying the QCD structure of DIS final states. Another important feature of tagged DIS off the lightest nuclei is the possibility of performing pole extrapolation with a high degree of accuracy. Such extrapolation allows an extraction of the neutron structure function in a model independent way due to suppression of the final-state interaction in the on-shell limit of the struck nucleon propagator. We review the first application of the pole extrapolation to recent experimental data. Finally, we outline the extension of the framework to inclusive DIS, including a polarized deuteron target as well as its application to the tagged DIS reactions for future experiments at fixed target and collider energies.

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“…The major difficulty in doing this is that one lacks detailed information about the composition and spacetime evolution of the hadronic system produced in the deep-inelastic scattering and how this changes as a function of Bjorken x and Q 2 . Here, we present work in a model that has been used to account for FSI mechanisms at moderate and high Bjorken x in e + d → e + X + p s [11][12][13] as well as inclusive deuteron DIS [14,15]. …”

Section: Introductionmentioning

confidence: 99%

Tagged spectator deep-inelastic scattering off the deuteron as a tool to study neutron structure

Cosyn

Sargsian

2016

EPJ Web of Conferences

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Abstract. We give an overview of a model to describe deep-inelastic scattering (DIS) off the deuteron with a spectator proton, based on the virtual nucleon approximation (VNA). The model accounts for the final-state interactions (FSI) of the DIS debris with the spectator proton. Values of the rescattering cross section are obtained by fits to high-momentum spectator data. By using the so-called "pole extrapolation" method, free neutron structure functions can be obtained by extrapolating low-momentum spectator proton data to the on-shell neutron pole. We apply this method to the BONuS data set and find a surprising Bjorken x dependence, indicating a possible rise of the neutron to proton structure function ratio at high x.

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Final-state interactions in inclusive deep-inelastic scattering from the deuteron

Cited by 19 publications

References 60 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

Nuclear final-state interactions in deep inelastic scattering off the lightest nuclei

Tagged spectator deep-inelastic scattering off the deuteron as a tool to study neutron structure

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