Photoproduction of the ρ0meson on the proton at large momentum transfer

M. Battaglieri, E. Anciant, M. Anghinolfi, R. De Vita, E. Golovach, J. M. Laget, V. Mokeev, M. Ripani, G. Adams, M. J. Amaryan, D. S. Armstrong, B. Asavapibhop, G. Asryan, G. Audit, T. Auger, H. Avakian, S. Barrow, K. Beard, M. Bektasoglu, B. L. BermanN. Bianchi, A. S. Biselli, S. Boiarinov, D. Branford, W. J. Briscoe, W. K. Brooks, V. D. Burkert, J. R. Calarco, G. P. Capitani, D. S. Carman, B. Carnahan, A. Cazes, C. Cetina, P. L. Cole, A. Coleman, D. Cords, P. Corvisiero, D. Crabb, H. Crannell, J. P. Cummings, E. DeSanctis, P. V. Degtyarenko, R. Demirchyan, H. Denizli, L. Dennis, K. V. Dharmawardane, K. S. Dhuga, C. Djalali, G. E. Dodge, D. Doughty, P. Dragovitsch, M. Dugger, S. Dytman, M. Eckhause, H. Egiyan, K. S. Egiyan, L. Elouadrhiri, L. Farhi, R. J. Feuerbach, J. Ficenec, T. A. Forest, A. P. Freyberger, V. Frolov, H. Funsten, S. J. Gaff, M. Gai, S. Gilad, G. P. Gilfoyle, K. L. Giovanetti, K. Griffioen, M. Guidal, M. Guillo, V. Gyurjyan, D. Hancock, J. Hardie, D. Heddle, F. W. Hersman, K. Hicks, R. S. Hicks, M. Holtrop, C. E. Hyde-Wright, M. M. Ito, K. Joo, J. H. Kelley, M. Khandaker, W. Kim, A. Klein, F. J. Klein, M. Klusman, M. Kossov, L. H. Kramer, Y. Kuang, S. E. Kuhn, D. Lawrence, M. Lucas, K. Lukashin, R. W. Major, J. J. Manak

Research output: Contribution to journalArticle


The differential cross section, dσ/dt, for ρ0meson photoproduction on the proton above the resonance region was measured up to a momentum transfer −t = 5GeV2using the CLAS detector at the Thomas Jefferson National Accelerator Facility. The ρ0channel was extracted from the measured two charged-pion cross sections by fitting the π+π−and pπ+invariant masses. The low momentum transfer region shows the typical diffractive pattern expected from Reggeon exchange. The flatter behavior at large −t cannot be explained solely in terms of QCD-inspired two-gluon exchange models. The data indicate that other processes, like quark interchange, are important to fully describe ρ photoproduction. © 2001 The American Physical Society.
Original languageEnglish
Pages (from-to)172002-1-172002-5
Number of pages5
JournalPhysical Review Letters
Publication statusPublished - 22 Oct 2001
Externally publishedYes

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    Battaglieri, M., Anciant, E., Anghinolfi, M., De Vita, R., Golovach, E., Laget, J. M., Mokeev, V., Ripani, M., Adams, G., Amaryan, M. J., Armstrong, D. S., Asavapibhop, B., Asryan, G., Audit, G., Auger, T., Avakian, H., Barrow, S., Beard, K., Bektasoglu, M., ... Manak, J. J. (2001). Photoproduction of the ρ0meson on the proton at large momentum transfer. Physical Review Letters, 172002-1-172002-5.