Tagged spectator deep-inelastic scattering off the deuteron as a tool to study neutron structure
1 Department of Physics and Astronomy, Proeftuinstraat 86, Ghent University, 9000 Ghent, Belgium
2 Department of Physics, Florida International University, Miami FL, 33199 U.S.A
Published online: 21 March 2016
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.
© Owned by the authors, published by EDP Sciences, 2016