Search for Θ++ pentaquarks in the exclusive reaction γp→K+K−p

Kubarovsky, V. et al. (2006) Search for Θ++ pentaquarks in the exclusive reaction γp→K+K−p. Physical Review Letters, 97(10), p. 102001. (doi: 10.1103/PhysRevLett.97.102001)

Abstract

The reaction γp→pK+K− was studied at Jefferson Lab with photon energies from 1.8 to 3.8 GeV using a tagged photon beam. The goal was to search for a Θ++ pentaquark, a narrow, doubly charged baryon state having strangeness S=+1 and isospin I=1, in the pK+ invariant mass spectrum. No statistically significant evidence of a Θ++ was found. Upper limits on the total and differential cross section for the reaction γp→K−Θ++ were obtained in the mass range from 1.5 to 2.0  GeV/c², with an upper limit for a narrow resonance with a mass MΘ++=1.54  GeV/c² of about 0.15 nb, 95% C.L.. This result places a stringent upper limit on the Θ++ width ΓΘ++<0.1  MeV/c².

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: McKinnon, Dr Bryan and Melone, Mr John and Livingston, Dr Kenneth and Protopopescu, Dr Dan and Ireland, Professor David and Kellie, Dr James and Rosner, Professor Guenther
• Authors: Kubarovsky, V., Battaglieri, M., De Vita, R., Goett, J., Guo, L., Mutchler, G., Stoler, P., Weygand, D., Ambrozewicz, P., Anghinolfi, M., Asryan, G., Avakian, H., Bagdasaryan, H., Baillie, N., Ball, J., Baltzell, N., Batourine, V., Bedlinskiy, I., Bellis, M., Benmouna, N., Berman, B., Biselli, A., Bouchigny, S., Boiarinov, S., Bradford, R., Branford, D., Briscoe, W., Brooks, W., Bueltmann, S., Burkert, V., Butuceanu, C., Calarco, J., Careccia, S., Carman, D., Chen, S., Clinton, E., Cole, P., Collins, P., Coltharp, P., Crabb, D., Crannell, H., Crede, V., Cummings, J., De Masi, R., Dale, D., De Sanctis, E., Degtyarenko, P., Deur, A., Dharmawardane, K., Djalali, C., Dodge, G., Donnelly, J., Doughty, D., Dugger, M., Dzyubak, O., Egiyan, H., Egiyan, K., Elouadrhiri, L., Eugenio, P., Fedotov, G., Funsten, H., Gabrielyan, M., Gan, L., Garcon, M., Gasparian, A., Gavalian, G., Gilfoyle, G., Giovanetti, K., Girod, F., Glamazdin, O., Goetz, J., Golovach, E., Gonenc, A., Gordon, C., Gothe, R., Griffioen, K., Guidal, M., Guler, N., Gyurjyan, V., Hadjidakis, C., Hafidi, K., Hakobyan, R., Hardie, J., Hersman, F., Hicks, K., 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., Kuhn, J., Kuhn, S., Kuleshov, S., Lachniet, J., Laget, J., Langheinrich, J., Lawrence, D., Lee, T., Li, J., Livingston, K., Lu, H., MacCormick, M., Markov, N., McKinnon, B., Mecking, B., Melone, J., Mestayer, M., Meyer, C., Mibe, T., Mikhailov, K., Minehart, R., Mirazita, M., Miskimen, R., Mochalov, V., Mokeev, V., Morand, L., Morrow, S., Moteabbed, M., Nadel-Turonski, P., Nakagawa, I., Nasseripour, R., Niccolai, S., Niculescu, G., Niculescu, I., Niczyporuk, B., Niroula, M., Niyazov, R., Nozar, M., Osipenko, M., Ostrovidov, A., Park, K., Pasyuk, E., Paterson, C., Pierce, J., Pivnyuk, N., Pocanic, D., Pogorelko, O., Pozdniakov, S., Price, J., Prok, Y., Protopopescu, D., Raue, B., Riccardi, G., Ricco, G., Ripani, M., Ritchie, B., Ronchetti, F., Rosner, G., Rossi, P., 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., Stepanyan, S., Stokes, B., Strakovsky, I., Strauch, S., Taiuti, M., Tedeschi, D., Teymurazyan, A., Thoma, U., Tkabladze, A., Tkachenko, S., Todor, L., Tur, C., Ungaro, M., Vineyard, M., Vlassov, A., Weinstein, L., Williams, M., Wolin, E., Wood, M., Yegneswaran, A., Zana, L., Zhang, J., and Zhao, B.
• 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: 06 September 2006