Measurement of the partial cross sections σtT, σlT, and (σT+ σl) of the 1H(e,eπ+)n reaction in the Δ(1232) resonance

J. M. Kirkpatrick, N. F. Sparveris, I. Nakagawa, A. M. Bernstein, Ricardo Alarcon, W. Bertozzi, T. Botto, P. Bourgeois, J. Calarco, F. Casagrande, M. O. Distler, K. Dow, M. Farkondeh, S. Georgakopoulos, S. Gilad, R. Hicks, A. Holtrop, A. Hotta, X. Jiang, A. KarabarbounisS. Kowalski, R. Milner, R. Miskimen, C. N. Papanicolas, A. J. Sarty, Y. Sato, S. Širca, J. Shaw, E. Six, S. Stave, E. Stiliaris, T. Tamae, G. Tsentalivich, C. Tschalaer, W. Turchinetz, Z. L. Zhou, T. Zwart

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Abstract

We report precision 1H(e,eπ+)n measurements in the Δ(1232) resonance at Q2=0.127(GeV/c)2 obtained at the MIT-Bates out-of-plane scattering facility. These are the lowest, but nonzero, Q2 measurements in the π+ channel. The data offer tests of the theoretical calculations, particularly of the background amplitude contributions. The chiral effective field theory and Sato-Lee model calculations are not in agreement with this experiment.

Original languageEnglish (US)
Article number028201
JournalPhysical Review C - Nuclear Physics
Volume84
Issue number2
DOIs
StatePublished - Aug 26 2011

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Kirkpatrick, J. M., Sparveris, N. F., Nakagawa, I., Bernstein, A. M., Alarcon, R., Bertozzi, W., Botto, T., Bourgeois, P., Calarco, J., Casagrande, F., Distler, M. O., Dow, K., Farkondeh, M., Georgakopoulos, S., Gilad, S., Hicks, R., Holtrop, A., Hotta, A., Jiang, X., ... Zwart, T. (2011). Measurement of the partial cross sections σtT, σlT, and (σT+ σl) of the 1H(e,eπ+)n reaction in the Δ(1232) resonance. Physical Review C - Nuclear Physics, 84(2), [028201]. https://doi.org/10.1103/PhysRevC.84.028201