Relative to the case for the proton, very little is known of Semi-Inclusive Deep Inelastic Scattering (SIDIS) physics resulting from a deuteron target. Electrons with energy of 5.3 GeV are used on both deuteron and proton targets to study single pion production in the SIDIS framework for all 3 pion charge states. What makes this specific experiment unique is that it offers a virtually free neutron target by tagging protons with momentum 70-150 MeV and scattering angle greater than 90^0 called `spectators' that are detected by a radial time projection chamber that uses gaseous electron multipliers. The scattered electrons and resulting pions are then detected in the CEBAF Large Acceptance Spectrometer. The kinematic range covered is W>2GeV, Q^2>1GeV^2, 0.1<xBjorken<0.5, 0.3<z<0.7, Pt<1GeV. This study involves taking the ratios of the channel ed->e'(pspectator)πX for deuteron to proton targets, as well as tagged to untagged in the spectator scenario specifically for deuteron, and examining their dependence on certain kinematic variables of interest (xBjorken,Pt,z,...). From these ratios much can be learned about the deuteron including the gaining of some understanding of quark distributions in the proton and neutron. A look at the status of this study will be presented along with some preliminary results.
APS Division of Nuclear Physics Meeting Abstracts
- Pub Date:
- October 2007