First Measurement of the Double Spin Asymmetry in [Formula presented] in the Resonance Region

R. De Vita, M. Anghinolfi, V. D. Burkert, G. E. Dodge, R. Minehart, M. Taiuti, H. Weller, G. Adams, M. J. Amaryan, E. Anciant, D. S. Armstrong, B. Asavapibhop, G. Asryan, G. Audit, T. Auger, H. Avakian, H. Bagdasaryan, J. P. Ball, S. Barrow, M. BattaglieriK. Beard, M. Bektasoglu, N. Bianchi, A. S. Biselli, S. Boiarinov, B. E. Bonner, P. Bosted, S. Bouchigny, D. Branford, W. K. Brooks, S. Bueltmann, J. R. Calarco, G. P. Capitani, D. S. Carman, B. Carnahan, A. Cazes, L. Ciciani, P. L. Cole, A. Coleman, J. Connelly, D. Cords, P. Corvisiero, D. Crabb, H. Crannell, J. P. Cummings, E. De Sanctis, P. V. Degtyarenko, R. Demirchyan, H. Denizli, L. Dennis, K. V. Dharmawardane, K. S. Dhuga, C. Djalali, D. Doughty, P. Dragovitsch, M. Dugger, S. Dytman, M. Eckhause, H. Egiyan, K. S. Egiyan, L. Elouadrhiri, A. Empl, L. Farhi, R. Fatemi, R. J. Feuerbach, J. Ficenec, T. A. Forest, V. Frolov, H. Funsten, S. J. Gaff, M. Gai, M. Garçon, G. Gavalian, S. Gilad, G. P. Gilfoyle, K. L. Giovanetti, P. Girard, E. Golovatch, K. Griffioen, M. Guidal, M. Guillo, V. Gyurjyan, C. Hadjidakis, D. Hancock, J. Hardie, D. Heddle, P. Heimberg, F. W. Hersman, K. Hicks, R. S. Hicks, M. Holtrop, J. Hu, C. E. Hyde-Wright, B. S. Ishkanov

Research output: Contribution to journalArticle


The double spin asymmetry in the [Formula presented] reaction has been measured for the first time in the resonance region for four-momentum transfer [Formula presented]. Data were taken at Jefferson Lab with the CLAS detector using a 2.6 GeV polarized electron beam incident on a polarized solid [Formula presented] target. Comparison with predictions of phenomenological models shows strong sensitivity to resonance contributions. Helicity- [Formula presented] transitions are found to be dominant in the second and third resonance regions. The measured asymmetry is consistent with a faster rise with [Formula presented] of the helicity asymmetry [Formula presented] for the [Formula presented] resonance than expected from the analysis of the unpolarized data. © 2002 The American Physical Society.
Original languageEnglish
Pages (from-to)6
Number of pages1
JournalPhysical Review Letters
Publication statusPublished - 1 Jan 2002
Externally publishedYes

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    De Vita, R., Anghinolfi, M., Burkert, V. D., Dodge, G. E., Minehart, R., Taiuti, M., Weller, H., Adams, G., Amaryan, M. J., Anciant, E., Armstrong, D. S., Asavapibhop, B., Asryan, G., Audit, G., Auger, T., Avakian, H., Bagdasaryan, H., Ball, J. P., Barrow, S., ... Ishkanov, B. S. (2002). First Measurement of the Double Spin Asymmetry in [Formula presented] in the Resonance Region. Physical Review Letters, 6.