Exclusive photoproduction of the cascade (Ξ) hyperons

J. W. Price, B. M.K. Nefkens, J. L. Ducote, J. T. Goetz, G. Adams, P. Ambrozewicz, E. Anciant, M. Anghinolfi, B. Asavapibhop, G. Audit, T. Auger, H. Avakian, H. Bagdasaryan, J. P. Ball, S. Barrow, M. Battaglieri, K. Beard, M. Bektasoglu, M. Bellis, N. BenmounaB. L. Berman, N. Bianchi, A. S. Biselli, S. Boiarinov, S. Bouchigny, R. Bradford, D. Branford, W. J. Briscoe, W. K. Brooks, V. D. Burkert, C. Butuceanu, J. R. Calarco, D. S. Carman, B. Carnahan, C. Cetina, S. Chen, P. L. Cole, A. Coleman, J. Connelly, D. Cords, P. Corvisiero, D. Crabb, H. Crannell, J. P. Cummings, E. de Sanctis, R. DeVita, P. V. Degtyarenko, H. Denizli, L. Dennis, K. V. Dharmawardane, C. Djalali, G. E. Dodge, D. Doughty, P. Dragovitsch, M. Dugger, S. Dytman, O. P. Dzyubak, M. Eckhause, H. Egiyan, K. S. Egiyan, L. Elouadrhiri, A. Empl, P. Eugenio, L. Farhi, R. Fatemi, R. J. Feuerbach, T. A. Forest, V. Frolov, H. Funsten, S. J. Gaff, G. Gavalian, G. P. Gilfoyle, K. L. Giovanetti, C. I.O. Gordon, R. Gothe, K. Griffioen, M. Guidal, M. Guillo, N. Guler, L. Guo, V. Gyurjyan, C. Hadjidakis, R. S. Hakobyan, D. Hancock, J. Hardie, D. Heddle, F. W. Hersman, K. Hicks, I. Hleiqawi, M. Holtrop, J. Hu, C. E. Hyde-Wright, Y. Ilieva, D. Ireland, M. M. Ito, D. Jenkins, K. Joo

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Abstract

We report on the first measurement of exclusive Ξ-(1321) hyperon photoproduction in γp→K+K+Ξ- for 3.2<Eγ<3.9 GeV. The final state is identified by the missing mass in p(γ,K+K+)X measured with the CLAS detector at Jefferson Laboratory. We have detected a significant number of the ground state Ξ-(1321)12+ and have estimated the total cross section for its production. We also have strong evidence for the first excited state Ξ-(1530)32+. Photoproduction provides a copious source of Ξ's. We discuss the possibilities of a search for the recently proposed Ξ5- and Ξ5+ pentaquarks. © 2005 The American Physical Society.
Original languageEnglish
JournalPhysical Review C - Nuclear Physics
DOIs
Publication statusPublished - 1 May 2005
Externally publishedYes

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    Price, J. W., Nefkens, B. M. K., Ducote, J. L., Goetz, J. T., Adams, G., Ambrozewicz, P., Anciant, E., Anghinolfi, M., Asavapibhop, B., Audit, G., Auger, T., Avakian, H., Bagdasaryan, H., Ball, J. P., Barrow, S., Battaglieri, M., Beard, K., Bektasoglu, M., Bellis, M., ... Joo, K. (2005). Exclusive photoproduction of the cascade (Ξ) hyperons. Physical Review C - Nuclear Physics. https://doi.org/10.1103/PhysRevC.71.058201