Search for the Θ+ pentaquark in the γd→ΛnK+ reaction measured with the CLAS Spectrometer

Niccolai, S. et al. (2006) Search for the Θ+ pentaquark in the γd→ΛnK+ reaction measured with the CLAS Spectrometer. Physical Review Letters, 97(3), 032001. (doi: 10.1103/PhysRevLett.97.032001)

Abstract

For the first time, the reaction γd→ΛnK+ has been analyzed in order to search for the exotic pentaquark baryon Θ+(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 γd→ΛΘ+ 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: McKinnon, Dr Bryan and Livingston, Dr Kenneth and Watts, Dr Daniel and Protopopescu, Dr Dan and Ireland, Professor David and Kellie, Dr James and Rosner, Professor Guenther
• Authors: Niccolai, S., Mirazita, M., Rossi, P., Baltzell, N., Carman, D., Hicks, K., McKinnon, B., Mibe, T., Stepanyan, S., Tedeschi, D., Adams, G., Ambrozewicz, P., Pereira, S., Anghinolfi, M., Asryan, G., Avakian, H., Bagdasaryan, H., Baillie, N., Ball, J., Batourine, V., Battaglieri, M., Bedlinskiy, I., Bektasoglu, M., Bellis, M., Benmouna, N., Berman, B., Biselli, A., Boiarinov, S., Bouchigny, S., Bradford, R., Branford, D., Briscoe, W., Brooks, W., Bultmann, S., Burkert, V., Butuceanu, C., Calarco, J., Careccia, S., Carnahan, B., Chen, S., Cole, P., Collins, P., Coltharp, P., Crabb, D., Crannell, H., Crede, V., Cummings, J., Dashyan, N., Degtyarenko, P., De Masi, R., Deppman, A., De Sanctis, E., Deur, A., DeVita, R., Dharmawardane, K., Djalali, C., Dodge, G., Donnelly, J., Doughty, D., Dugger, M., Dzyubak, O., Egiyan, H., Egiyan, K., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fedotov, G., Feldman, G., Funsten, H., Garcon, M., Gavalian, G., Gilfoyle, G., Giovanetti, K., Girod, F., Goetz, J., Gonenc, A., Gordon, C., Gothe, R., Griffioen, K., Guidal, M., Guler, N., Guo, L., Gyurjyan, V., Hadjidakis, C., Hafidi, K., Hakobyan, H., Hakobyan, R., Hardie, J., Hersman, F., Hleiqawi, I., Holtrop, M., Hyde-Wright, C., Ilieva, Y., Ireland, D., Ishkhanov, B., Isupov, E., Ito, M., Jenkins, D., Jo, H., Joo, K., Juengst, H., Kellie, J., Khandaker, M., Kim, W., Klein, A., Klein, F., Klimenko, A., Kossov, M., Kramer, L., Kubarovsky, V., Kuhn, J., Kuhn, S., Kuleshov, S., Lachniet, J., Langheinrich, J., Lawrence, D., Lee, T., Li, J., Livingston, K., Lu, H., MacCormick, M., Markov, N., Mecking, B., Mellor, J., Melone, J., Mestayer, M., Meyer, C., Mikhailov, K., Minehart, R., Miskimen, R., Mokeev, V., Morand, L., Morrow, S., Moteabbed, M., Mutchler, G., Nadel-Turonski, P., Napolitano, J., Nasseripour, R., Niculescu, G., Niculescu, I., Niczyporuk, B., Niroula, M., Niyazov, R., Nozar, M., Echeimberg, J., Osipenko, M., Ostrovidov, A., Park, K., Pasyuk, E., Paterson, C., Pierce, J., Pivnyuk, N., Pocanic, D., Pogorelko, O., Pozdniakov, S., Preedom, B., Price, J., Prok, Y., Protopopescu, D., Raue, B., Riccardi, G., Ricco, G., Ripani, M., Ritchie, B., Ronchetti, F., Rosner, G., Sabatie, F., Salgado, C., Santoro, J., Sapunenko, V., Schumacher, R., Serov, V., Sharabian, Y., Shvedunov, N., Smith, E., Smith, L., Sober, D., Stavinsky, A., Stepanyan, S., Stokes, B., Stoler, P., Strakovsky, I., Strauch, S., Taiuti, M., Thoma, U., Tkabladze, A., Tkachenko, S., Todor, L., Tur, C., Ungaro, M., Vineyard, M., Vlassov, A., Watts, D., Weinstein, L., Weygand, D., Williams, M., Wolin, E., Wood, M., Yegneswaran, A., Zana, L., Zhang, J., Zhao, B., Zhao, Z., and CLAS Collaboration,
• 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
• Published Online: 21 July 2006