Abstract
We present results on vector-meson leptoproduction in the SLAC fast-cycling 40-in. hydrogen bubble chamber exposed to 16-GeV/c muons. From 3644 inelastic events we obtained 495 events of , of which approximately 160 are events with GeV and . Analyzing these data in the same way as in our previous photoproduction experiment, we find the contribution to decreases by about 35% between , and the exponential slope parameter becomes approximately 20% smaller, although within errors it is still consistent with the photoproduction value. The decay angular distribution of the shows a substantial component which can be interpreted as evidence for production by longitudinal photons assuming -channel helicity is conserved. Data from 39 -production events are also presented. Upper limits for and production are given.
- Received 14 January 1974
DOI:https://doi.org/10.1103/PhysRevD.10.765
©1974 American Physical Society