Electroproduction of the S11(1535) Resonance at High Momentum Transfer
The Jefferson Lab E94014 collaboration, C. S. Armstrong
Abstract
The differential cross section for the process p(e,e'p)eta has been measured at Q2 = 2.4 and 3.6 (GeV/c)2 at center-of-mass energies encompassing the S11(1535) resonance. The latter point is the highest-Q2 exclusive measurement of this process to date. The resonance width and the helicity-1/2 transition amplitude are extracted from the data, and evidence for the possible onset of scaling in this reaction is shown. A lower bound of approximately 0.45 is placed on the S11(1535) to eta branching fraction.
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