Search for the Theta(+) pentaquark in the gamma d ->Lambda nK(+) reaction measured with the CLAS spectrometer

Niccolai, S. et al. (2006) Search for the Theta(+) pentaquark in the gamma d ->Lambda nK(+) reaction measured with the CLAS spectrometer. Physical Review Letters, 97(3), (doi: 10.1103/PhysRevLett.97.032001)

Abstract

For the first time, the reaction gamma d ->Lambda nK(+) has been analyzed in order to search for the exotic pentaquark baryon Theta(+)(1540). The data were taken at Jefferson Laboratory, using the Hall-B tagged-photon beam of energy between 0.8 and 3.6 GeV and the CEBAF Large Acceptance Spectrometer (CLAS). No statistically significant structures were observed in the nK(+) invariant-mass distribution. The upper limit on the gamma d ->Lambda Theta(+) integrated cross section has been calculated and found to be between 5 and 25 nb, depending on the production model assumed. The upper limit on the differential cross section is also reported.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Protopopescu, Dr Dan
• Authors: Niccolai, S., Mirazita, M., Rossi, P., Baltzell, N. A., Carman, D. S., Hicks, K., McKinnon, B., Mibe, T., Stepanyan, S., Tedeschi, D. J., Adams, G., Ambrozewicz, P., Pereira, S. A., Anghinolfi, M., Asryan, G., Avakian, H., Bagdasaryan, H., Baillie, N., Ball, J. P., Batourine, V., Battaglieri, M., Bedlinskiy, I., Bektasoglu, M., Bellis, M., Benmouna, N., Berman, B. L., Biselli, A. S., Boiarinov, S., Bouchigny, S., Bradford, R., Branford, D., Briscoe, W. J., Brooks, W. K., Bultmann, S., Burkert, V. D., Butuceanu, C., Calarco, J. R., Careccia, S. L., Carnahan, B., Chen, S., Cole, P. L., Collins, P., Coltharp, P., Crabb, D., Crannell, H., Crede, V., Cummings, J. P., Dashyan, N., Degtyarenko, P. V., De Masi, R., Deppman, A., De Sanctis, E., Deur, A., DeVita, R., Dharmawardane, K. V., Djalali, C., Dodge, G. E., Donnelly, J., Doughty, D., Dugger, M., Dzyubak, O. P., Egiyan, H., Egiyan, K. S., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fedotov, G., Feldman, G., Funsten, H., Garcon, M., Gavalian, G., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Goetz, J. T., Gonenc, A., Gordon, C. I. O., Gothe, R. W., Griffioen, K. A., Guidal, M., Guler, N., Guo, L., Gyurjyan, V., Hadjidakis, C., Hafidi, K., Hakobyan, H., Hakobyan, R. S., Hardie, J., Hersman, F. W., Hleiqawi, I., Holtrop, M., Hyde-Wright, C. E., Ilieva, Y., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Ito, M. M., Jenkins, D., Jo, H. S., Joo, K., Juengst, H. G., Kellie, J. D., Khandaker, M., Kim, W., Klein, A., Klein, F. J., Klimenko, A. V., Kossov, M., Kramer, L. H., Kubarovsky, V., Kuhn, J., Kuhn, S. E., Kuleshov, S. V., Lachniet, J., Langheinrich, J., Lawrence, D., Lee, T., Li, J., Livingston, K., Lu, H., MacCormick, M., Markov, N., Mecking, B. A., Mellor, J., Melone, J. J., Mestayer, M. D., Meyer, C. A., Mikhailov, K., Minehart, R., Miskimen, R., Mokeev, V., Morand, L., Morrow, S. A., Moteabbed, M., Mutchler, G. S., Nadel-Turonski, P., Napolitano, J., Nasseripour, R., Niculescu, G., Niculescu, I., Niczyporuk, B. B., Niroula, M. R., Niyazov, R. A., Nozar, M., de Oliveira Echeimberg, J., Osipenko, M., Ostrovidov, A. I., Park, K., Pasyuk, E., Paterson, C., Pierce, J., Pivnyuk, N., Pocanic, D., Pogorelko, O., Pozdniakov, S., Preedom, B. M., Price, J. W., Prok, Y., Protopopescu, D., Raue, B. A., Riccardi, G., Ricco, G., Ripani, M., Ritchie, B. G., Ronchetti, F., Rosner, G., Sabatie, F., Salgado, C., Santoro, J. P., Sapunenko, V., Schumacher, R. A., Serov, V. S., Sharabian, Y. G., Shvedunov, N. V., Smith, E. S., Smith, L. C., Sober, D. I., Stavinsky, A., Stepanyan, S. S., Stokes, B. E., Stoler, P., Strakovsky, I. I., Strauch, S., Taiuti, M., Thoma, U., Tkabladze, A., Tkachenko, S., Todor, L., Tur, C., Ungaro, M., Vineyard, M. F., Vlassov, A. V., Watts, D. P., Weinstein, L. B., Weygand, D. P., Williams, M., Wolin, E., Wood, M. H., Yegneswaran, A., Zana, L., Zhang, J., Zhao, B., and Zhao, Z.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Physical Review Letters
• Publisher: American Physical Society
• ISSN: 0031-9007
• ISSN (Online): 1079-7114