| Popis: |
We report measurements of semi-inclusive pion electroproduction from both hydrogen and deuterium targets carried out at the Wilson Synchrotron Laboratory at Cornell University. Measurements were made at the (W,Q/sup 2/) points (2.15 GeV, 1.2 GeV/sup 2/), (2.15, 4.0), and (3.11, 1.2) with hydrogen and deuterium, and at (2.15, 2.0), (2.67, 3.3), and (3.11, 1.7) with hydrogen only. The invariant virtual-photoproduction cross section for pions scaled by the total cross section is studied as a function of x', P/sub T/ /sup 2/, W, and Q/sup 2/. The invariant structure function shows no Q/sup 2/ dependence and a weak W dependence. The ratio of ..pi../sup +/ to ..pi../sup -/ production is also presented, but a distinction between a universal ..omega.. or W dependence cannot be made. |
