Phys. Rev. Lett. 37, 13261329 (1976); DOI: 10.1103/PhysRevLett.37.1326

Scalar-Transverse Separation for Single Pi+ Electroproduction

C. J. Bebek, A. Browman, C. N. Brown, K. M. Hanson, S. D. Holmes, R. V. Kline, D. Larson, F. M. Pipkin, S. W. Raither, A. Silverman, and L. K. Sisterson
Cornell University and Harvard University


We report measurements of the exclusive electroproduction reaction e + p --> e + pi+ + n for pions produced near 0 in the virtual-photon-proton center-of-mass system with values of epsilon in the range 0.35< epsilon <0.45. Combination with data taken at epsilon near 1 allows us to separate the contributions from transversely polarized and scalar photons in the range 1.2 GeV^2 < Q^2 < 3.3 GeV^2.

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