Abstract
We report on progress of the analysis of experiments E02-109 and E04-001, which were carried out at the Thomas Jefferson National Accelerator Facility (Jlab). The analysis is in progress. Various efficiencies (tracking, Čerenkov, Calorimeter) were determined. Background events from electron-positron pairs, and from the aluminum walls of the cryogenic target cells were measured. Pion rejection was implemented in the hardware trigger, and the remaining pion background was cut by using information from the Čerenkov and Calorimeter detectors. Density corrections have been determined for local boiling effect in the cryogenic targets. Preliminary cross sections were calculated for all beam energies, angles and targets. All tables of the cross sections are available via web-page: http://hallcweb.jlab.org/elogs/Jan05+Experiments/ (items:65, 68–88).
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