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Electron Scattering from a High-Momentum Neutron in Deuterium

Spokesperson
Sebastian Kuhn
Year
2002
Abstract
We report results from an experiment measuring the semiinclusive reaction D(e,e`ps) where the proton ps is moving at a large angle relative to the momentum transfer. If we assume that the proton was a spectator to the reaction taking place on the neutron in deuterium, the initial state of that neutron can be inferred. This method, known as spectator tagging, can be used to study electron scattering from high-momentum (off-shell) neutrons in deuterium. The data were taken with a 5.765 GeV electron beam on a deuterium target in Jefferson Laboratory's Hall B, using the CLAS detector. A reduced cross section was extracted for different values of final-state missing mass $W^{*}$, backward proton momentum $\vec{p}_{s}$ and momentum transfer $Q^{2}$. The data are compared to a simple PWIA spectator model. A strong enhancement in the data observed at transverse kinematics is not reproduced by the PWIA model and can be associated with the contribution of final state interactions (FSI) that were not incorporated into the model. A ``bound neutron structure function'' \f2neff was extracted as a function of $W^{*}$ and the scaling variable $x^{*}$ at extreme backward kinematics, where effects of FSI appear to be small. For $p_{s}>400\,\,\mathrm{MeV/c}$, where the neutron is far off-shell, the model overestimates the value of $F_{2n}$ in the region of $x^{*}$ between 0.25 and 0.6. A modification of the bound neutron structure function is one of possible effects that can cause the observed deviation.
Publication
  1. A. V. Klimenko, S. E. Kuhn, and CLAS Collaboration Electron Scattering From High-Momentum Neutrons in Deuterium // Phys. Rev. C 73, 035212 (2006) arXiv:nucl-ex/0510032
Quantities
F2 * P(Pt)   F2 * P(Ps)   F2(x*,Q2)

Measurements

ID Quantity Beam Target Final state Q2min,
GeV2 		Q2max,
GeV2 		Wmin,
GeV 		Wmax,
GeV
E90M1 F2 * P(Ps) e d p+X 1.8 1.8 0.94 0.94
E90M2 F2 * P(Ps) e d p+X 1.8 1.8 1.25 1.25
E90M3 F2 * P(Ps) e d p+X 1.8 1.8 1.5 1.5
E90M4 F2 * P(Ps) e d p+X 1.8 1.8 1.73 1.73
E90M5 F2 * P(Ps) e d p+X 1.8 1.8 2.02 2.02
E90M6 F2 * P(Ps) e d p+X 1.8 1.8 2.4 2.4
E90M7 F2 * P(Ps) e d p+X 2.8 2.8 0.94 0.94
E90M8 F2 * P(Ps) e d p+X 2.8 2.8 1.25 1.25
E90M9 F2 * P(Ps) e d p+X 2.8 2.8 1.5 1.5
E90M10 F2 * P(Ps) e d p+X 2.8 2.8 1.73 1.73
E90M11 F2 * P(Ps) e d p+X 2.8 2.8 2.02 2.02
E90M12 F2 * P(Ps) e d p+X 2.8 2.8 2.4 2.4
E90M13 F2 * P(Ps) e d p+X 1.8 1.8 0.94 0.94
E90M14 F2 * P(Ps) e d p+X 1.8 1.8 1.25 1.25
E90M15 F2 * P(Ps) e d p+X 1.8 1.8 1.5 1.5
E90M16 F2 * P(Ps) e d p+X 1.8 1.8 1.73 1.73
E90M17 F2 * P(Ps) e d p+X 1.8 1.8 2.02 2.02
E90M18 F2 * P(Ps) e d p+X 1.8 1.8 2.4 2.4
E90M19 F2 * P(Ps) e d p+X 2.8 2.8 0.94 0.94
E90M20 F2 * P(Ps) e d p+X 2.8 2.8 1.25 1.25
E90M21 F2 * P(Ps) e d p+X 2.8 2.8 1.5 1.5
E90M22 F2 * P(Ps) e d p+X 2.8 2.8 1.73 1.73
E90M23 F2 * P(Ps) e d p+X 2.8 2.8 2.02 2.02
E90M24 F2 * P(Ps) e d p+X 2.8 2.8 2.4 2.4
E90M25 F2 * P(Ps) e d p+X 1.8 1.8 0.94 0.94
E90M26 F2 * P(Ps) e d p+X 1.8 1.8 1.25 1.25
E90M27 F2 * P(Ps) e d p+X 1.8 1.8 1.5 1.5
E90M28 F2 * P(Ps) e d p+X 1.8 1.8 1.73 1.73
E90M29 F2 * P(Ps) e d p+X 1.8 1.8 2.02 2.02
E90M30 F2 * P(Ps) e d p+X 1.8 1.8 2.4 2.4
E90M31 F2 * P(Ps) e d p+X 2.8 2.8 0.94 0.94
E90M32 F2 * P(Ps) e d p+X 2.8 2.8 1.25 1.25
E90M33 F2 * P(Ps) e d p+X 2.8 2.8 1.5 1.5
E90M34 F2 * P(Ps) e d p+X 2.8 2.8 1.73 1.73
E90M35 F2 * P(Ps) e d p+X 2.8 2.8 2.02 2.02
E90M36 F2 * P(Ps) e d p+X 2.8 2.8 2.4 2.4
E90M37 F2 * P(Ps) e d p+X 1.8 1.8 0.94 0.94
E90M38 F2 * P(Ps) e d p+X 1.8 1.8 1.25 1.25
E90M39 F2 * P(Ps) e d p+X 1.8 1.8 1.5 1.5
E90M40 F2 * P(Ps) e d p+X 1.8 1.8 1.73 1.73
E90M41 F2 * P(Ps) e d p+X 1.8 1.8 2.02 2.02
E90M42 F2 * P(Ps) e d p+X 1.8 1.8 2.4 2.4
E90M43 F2 * P(Ps) e d p+X 2.8 2.8 0.94 0.94
E90M44 F2 * P(Ps) e d p+X 2.8 2.8 1.25 1.25
E90M45 F2 * P(Ps) e d p+X 2.8 2.8 1.5 1.5
E90M46 F2 * P(Ps) e d p+X 2.8 2.8 1.73 1.73
E90M47 F2 * P(Ps) e d p+X 2.8 2.8 2.02 2.02
E90M48 F2 * P(Ps) e d p+X 2.8 2.8 2.4 2.4
E90M49 F2 * P(Ps) e d p+X 1.8 1.8 0.94 0.94
E90M50 F2 * P(Ps) e d p+X 1.8 1.8 1.25 1.25
E90M51 F2 * P(Ps) e d p+X 1.8 1.8 1.5 1.5
E90M52 F2 * P(Ps) e d p+X 1.8 1.8 1.73 1.73
E90M53 F2 * P(Ps) e d p+X 1.8 1.8 2.02 2.02
E90M54 F2 * P(Ps) e d p+X 1.8 1.8 2.4 2.4
E90M55 F2 * P(Ps) e d p+X 2.8 2.8 0.94 0.94
E90M56 F2 * P(Ps) e d p+X 2.8 2.8 1.25 1.25
E90M57 F2 * P(Ps) e d p+X 2.8 2.8 1.5 1.5
E90M58 F2 * P(Ps) e d p+X 2.8 2.8 1.73 1.73
E90M59 F2 * P(Ps) e d p+X 2.8 2.8 2.02 2.02
E90M60 F2 * P(Ps) e d p+X 2.8 2.8 2.4 2.4
E90M61 F2 * P(Ps) e d p+X 0.18 0.18 2.4 2.4
E90M62 F2 * P(Ps) e d p+X 0.25 0.25 2.4 2.4
E90M63 F2 * P(Ps) e d p+X 0.35 0.35 2.4 2.4
E90M64 F2 * P(Ps) e d p+X 0.45 0.45 2.4 2.4
E90M65 F2 * P(Ps) e d p+X 0.55 0.55 2.4 2.4
E90M66 F2 * P(Ps) e d p+X 0.65 0.65 2.4 2.4
E90M67 F2 * P(Ps) e d p+X 0.25 0.25 2.4 2.4
E90M68 F2 * P(Ps) e d p+X 0.35 0.35 2.4 2.4
E90M69 F2 * P(Ps) e d p+X 0.45 0.45 2.4 2.4
E90M70 F2 * P(Ps) e d p+X 0.55 0.55 2.4 2.4
E90M71 F2 * P(Ps) e d p+X 0.65 0.65 2.4 2.4
E90M72 F2 * P(Ps) e d p+X 0.18 0.18 2.4 2.4
E90M73 F2 * P(Ps) e d p+X 0.25 0.25 2.4 2.4
E90M74 F2 * P(Ps) e d p+X 0.35 0.35 2.4 2.4
E90M75 F2 * P(Ps) e d p+X 0.45 0.45 2.4 2.4
E90M76 F2 * P(Ps) e d p+X 0.55 0.55 2.4 2.4
E90M77 F2 * P(Ps) e d p+X 0.65 0.65 2.4 2.4
E90M78 F2 * P(Ps) e d p+X 0.25 0.25 2.4 2.4
E90M79 F2 * P(Ps) e d p+X 0.35 0.35 2.4 2.4
E90M80 F2 * P(Ps) e d p+X 0.45 0.45 2.4 2.4
E90M81 F2 * P(Ps) e d p+X 0.55 0.55 2.4 2.4
E90M82 F2 * P(Ps) e d p+X 0.65 0.65 2.4 2.4
E90M83 F2 * P(Ps) e d p+X 0.18 0.18 2.4 2.4
E90M84 F2 * P(Ps) e d p+X 0.25 0.25 2.4 2.4
E90M85 F2 * P(Ps) e d p+X 0.35 0.35 2.4 2.4
E90M86 F2 * P(Ps) e d p+X 0.45 0.45 2.4 2.4
E90M87 F2 * P(Ps) e d p+X 0.55 0.55 2.4 2.4
E90M88 F2 * P(Ps) e d p+X 0.65 0.65 2.4 2.4
E90M89 F2 * P(Ps) e d p+X 0.25 0.25 2.4 2.4
E90M90 F2 * P(Ps) e d p+X 0.35 0.35 2.4 2.4
E90M91 F2 * P(Ps) e d p+X 0.45 0.45 2.4 2.4
E90M92 F2 * P(Ps) e d p+X 0.55 0.55 2.4 2.4
E90M93 F2 * P(Ps) e d p+X 0.65 0.65 2.4 2.4
E90M94 F2 * P(Ps) e d p+X 0.18 0.18 2.4 2.4
E90M95 F2 * P(Ps) e d p+X 0.25 0.25 2.4 2.4
E90M96 F2 * P(Ps) e d p+X 0.35 0.35 2.4 2.4
E90M97 F2 * P(Ps) e d p+X 0.45 0.45 2.4 2.4
E90M98 F2 * P(Ps) e d p+X 0.55 0.55 2.4 2.4
E90M99 F2 * P(Ps) e d p+X 0.65 0.65 2.4 2.4
E90M100 F2 * P(Ps) e d p+X 0.25 0.25 2.4 2.4
Created in SINP MSU, CLAS Collaboration