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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
E90M101 F2 * P(Ps) e d p+X 0.35 0.35 2.4 2.4
E90M102 F2 * P(Ps) e d p+X 0.45 0.45 2.4 2.4
E90M103 F2 * P(Ps) e d p+X 0.55 0.55 2.4 2.4
E90M104 F2 * P(Ps) e d p+X 0.65 0.65 2.4 2.4
E90M105 F2 * P(Ps) e d p+X 0.18 0.18 2.4 2.4
E90M106 F2 * P(Ps) e d p+X 0.25 0.25 2.4 2.4
E90M107 F2 * P(Ps) e d p+X 0.35 0.35 2.4 2.4
E90M108 F2 * P(Ps) e d p+X 0.45 0.45 2.4 2.4
E90M109 F2 * P(Ps) e d p+X 0.55 0.55 2.4 2.4
E90M110 F2 * P(Ps) e d p+X 0.65 0.65 2.4 2.4
E90M111 F2 * P(Ps) e d p+X 0.25 0.25 2.4 2.4
E90M112 F2 * P(Ps) e d p+X 0.35 0.35 2.4 2.4
E90M113 F2 * P(Ps) e d p+X 0.45 0.45 2.4 2.4
E90M114 F2 * P(Ps) e d p+X 0.55 0.55 2.4 2.4
E90M115 F2 * P(Ps) e d p+X 0.65 0.65 2.4 2.4
E90M116 F2(x*,Q2) e d p+X 1.8 1.8 2.4 2.4
E90M117 F2(x*,Q2) e d p+X 1.8 1.8 2.4 2.4
E90M118 F2(x*,Q2) e d p+X 1.8 1.8 2.4 2.4
E90M119 F2(x*,Q2) e d p+X 1.8 1.8 2.4 2.4
E90M120 F2(x*,Q2) e d p+X 1.8 1.8 2.4 2.4
E90M121 F2(x*,Q2) e d p+X 2.8 2.8 2.4 2.4
E90M122 F2(x*,Q2) e d p+X 2.8 2.8 2.4 2.4
E90M123 F2(x*,Q2) e d p+X 2.8 2.8 2.4 2.4
E90M124 F2(x*,Q2) e d p+X 2.8 2.8 2.4 2.4
E90M125 F2(x*,Q2) e d p+X 2.8 2.8 2.4 2.4
E90M126 F2(x*,Q2) e d p+X 1.8 1.8 2.4 2.4
E90M127 F2(x*,Q2) e d p+X 1.8 1.8 2.4 2.4
E90M128 F2(x*,Q2) e d p+X 1.8 1.8 2.4 2.4
E90M129 F2(x*,Q2) e d p+X 1.8 1.8 2.4 2.4
E90M130 F2(x*,Q2) e d p+X 1.8 1.8 2.4 2.4
E90M131 F2(x*,Q2) e d p+X 1.8 1.8 2.4 2.4
E90M132 F2(x*,Q2) e d p+X 2.8 2.8 2.4 2.4
E90M133 F2(x*,Q2) e d p+X 2.8 2.8 2.4 2.4
E90M134 F2(x*,Q2) e d p+X 2.8 2.8 2.4 2.4
E90M135 F2(x*,Q2) e d p+X 2.8 2.8 2.4 2.4
E90M136 F2(x*,Q2) e d p+X 2.8 2.8 2.4 2.4
E90M137 F2(x*,Q2) e d p+X 2.8 2.8 2.4 2.4
E90M138 F2 * P(Pt) e d p+X 1.8 1.8 0.94 0.94
E90M139 F2 * P(Pt) e d p+X 1.8 1.8 1.25 1.25
E90M140 F2 * P(Pt) e d p+X 1.8 1.8 1.5 1.5
E90M141 F2 * P(Pt) e d p+X 1.8 1.8 1.73 1.73
E90M142 F2 * P(Pt) e d p+X 1.8 1.8 2.02 2.02
E90M143 F2 * P(Pt) e d p+X 1.8 1.8 2.4 2.4
E90M144 F2 * P(Pt) e d p+X 2.8 2.8 0.94 0.94
E90M145 F2 * P(Pt) e d p+X 2.8 2.8 1.25 1.25
E90M146 F2 * P(Pt) e d p+X 2.8 2.8 1.5 1.5
E90M147 F2 * P(Pt) e d p+X 2.8 2.8 1.73 1.73
E90M148 F2 * P(Pt) e d p+X 2.8 2.8 2.02 2.02
E90M149 F2 * P(Pt) e d p+X 2.8 2.8 2.4 2.4
E90M150 F2 * P(Pt) e d p+X 1.8 1.8 0.94 0.94
E90M151 F2 * P(Pt) e d p+X 1.8 1.8 1.25 1.25
E90M152 F2 * P(Pt) e d p+X 1.8 1.8 1.5 1.5
E90M153 F2 * P(Pt) e d p+X 1.8 1.8 1.73 1.73
E90M154 F2 * P(Pt) e d p+X 1.8 1.8 2.02 2.02
E90M155 F2 * P(Pt) e d p+X 1.8 1.8 2.4 2.4
E90M156 F2 * P(Pt) e d p+X 2.8 2.8 0.94 0.94
E90M157 F2 * P(Pt) e d p+X 2.8 2.8 1.25 1.25
E90M158 F2 * P(Pt) e d p+X 2.8 2.8 1.5 1.5
E90M159 F2 * P(Pt) e d p+X 2.8 2.8 1.73 1.73
E90M160 F2 * P(Pt) e d p+X 2.8 2.8 2.02 2.02
E90M161 F2 * P(Pt) e d p+X 2.8 2.8 2.4 2.4
E90M162 F2 * P(Pt) e d p+X 1.8 1.8 0.94 0.94
E90M163 F2 * P(Pt) e d p+X 1.8 1.8 1.25 1.25
E90M164 F2 * P(Pt) e d p+X 1.8 1.8 1.5 1.5
E90M165 F2 * P(Pt) e d p+X 1.8 1.8 1.73 1.73
E90M166 F2 * P(Pt) e d p+X 1.8 1.8 2.02 2.02
E90M167 F2 * P(Pt) e d p+X 1.8 1.8 2.4 2.4
E90M168 F2 * P(Pt) e d p+X 2.8 2.8 0.94 0.94
E90M169 F2 * P(Pt) e d p+X 2.8 2.8 1.25 1.25
E90M170 F2 * P(Pt) e d p+X 2.8 2.8 1.5 1.5
E90M171 F2 * P(Pt) e d p+X 2.8 2.8 1.73 1.73
E90M172 F2 * P(Pt) e d p+X 2.8 2.8 2.02 2.02
E90M173 F2 * P(Pt) e d p+X 2.8 2.8 2.4 2.4
E90M174 F2 * P(Pt) e d p+X 1.8 1.8 0.94 0.94
E90M175 F2 * P(Pt) e d p+X 1.8 1.8 1.25 1.25
E90M176 F2 * P(Pt) e d p+X 1.8 1.8 1.5 1.5
E90M177 F2 * P(Pt) e d p+X 1.8 1.8 1.73 1.73
E90M178 F2 * P(Pt) e d p+X 1.8 1.8 2.02 2.02
E90M179 F2 * P(Pt) e d p+X 1.8 1.8 2.4 2.4
E90M180 F2 * P(Pt) e d p+X 2.8 2.8 0.94 0.94
E90M181 F2 * P(Pt) e d p+X 2.8 2.8 1.25 1.25
E90M182 F2 * P(Pt) e d p+X 2.8 2.8 1.5 1.5
E90M183 F2 * P(Pt) e d p+X 2.8 2.8 1.73 1.73
E90M184 F2 * P(Pt) e d p+X 2.8 2.8 2.02 2.02
E90M185 F2 * P(Pt) e d p+X 2.8 2.8 2.4 2.4
E90M186 F2 * P(Pt) e d p+X 1.8 1.8 0.94 0.94
E90M187 F2 * P(Pt) e d p+X 1.8 1.8 1.25 1.25
E90M188 F2 * P(Pt) e d p+X 1.8 1.8 1.5 1.5
E90M189 F2 * P(Pt) e d p+X 1.8 1.8 1.73 1.73
E90M190 F2 * P(Pt) e d p+X 1.8 1.8 2.02 2.02
E90M191 F2 * P(Pt) e d p+X 1.8 1.8 2.4 2.4
E90M192 F2 * P(Pt) e d p+X 2.8 2.8 0.94 0.94
E90M193 F2 * P(Pt) e d p+X 2.8 2.8 1.25 1.25
E90M194 F2 * P(Pt) e d p+X 2.8 2.8 1.5 1.5
E90M195 F2 * P(Pt) e d p+X 2.8 2.8 1.73 1.73
E90M196 F2 * P(Pt) e d p+X 2.8 2.8 2.02 2.02
E90M197 F2 * P(Pt) e d p+X 2.8 2.8 2.4 2.4
E90M198 F2 * P(Pt) e d p+X 0.18 0.18 2.4 2.4
E90M199 F2 * P(Pt) e d p+X 0.25 0.25 2.4 2.4
E90M200 F2 * P(Pt) e d p+X 0.35 0.35 2.4 2.4
Created in SINP MSU, CLAS Collaboration