Electroproduction of the S11(1535) Resonance at High Momentum Transfer
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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