Search for the Θ+ Pentaquark in the Reaction γd→pK−K+n

McKinnon, B. et al. (2006) Search for the Θ+ Pentaquark in the Reaction γd→pK−K+n. Physical Review Letters, 96, p. 212001. (doi:10.1103/PhysRevLett.96.212001)

McKinnon, B. et al. (2006) Search for the Θ+ Pentaquark in the Reaction γd→pK−K+n. Physical Review Letters, 96, p. 212001. (doi:10.1103/PhysRevLett.96.212001)

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Abstract

A search for the Θ+ in the reaction γd→pK−K+n was completed using the CLAS detector at Jefferson Lab. A study of the same reaction, published earlier, reported the observation of a narrow Θ+ resonance. The present experiment, with more than 30 times the integrated luminosity of our earlier measurement, does not show any evidence for a narrow pentaquark resonance. The angle-integrated upper limit on Θ+ production in the mass range of 1.52–1.56  GeV/c<sup>2</sup> for the γd→pK−Θ+ reaction is 0.3 nb (95% C.L.). This upper limit depends on assumptions made for the mass and angular distribution of Θ+ production. Using Λ(1520) production as an empirical measure of rescattering in the deuteron, the cross section upper limit for the elementary γn→K−Θ+ reaction is estimated to be a factor of 10 higher, i.e., ∼3  nb (95% C.L.).

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:McKinnon, Dr Bryan and Livingston, Dr Kenneth and Protopopescu, Dr Dan and Ireland, Professor David and Kellie, Dr James and Rosner, Professor Guenther
Authors: McKinnon, B., Hicks, K., Baltzell, N., Carman, D., Mestayer, M., Mibe, T., Mirazita, M., Niccolai, S., Rossi, P., Stepanyan, S., Tedeschi, D., Ambrozewicz, P., Anghinolfi, M., Asryan, G., Avakian, H., Bagdasaryan, H., Baillie, N., Ball, J., Batourine, V., Battaglieri, M., Bedlinskiy, I., Bellis, M., Benmouna, N., Berman, B., Biselli, A., Bouchigny, S., Boiarinov, S., Bradford, R., Branford, D., Briscoe, W., Brooks, W., Bultmann, S., Burkert, V., Butuceanu, C., Calarco, J., Careccia, S., Chen, S., Cole, P., Collins, P., Coltharp, P., Crabb, D., Crede, V., Dale, D., De Masi, R., DeVita, R., De Sanctis, E., Degtyarenko, P., Deur, A., Djalali, C., Dodge, G., Donnelly, J., Doughty, D., Dugger, M., Dzyubak, O., Egiyan, H., Egiyan, K., Elouadrhiri, L., Eugenio, P., Fedotov, G., Feldman, G., Funsten, H., Gabrielyan, M., Gan, L., Garcon, M., Gasparian, A., Gavalian, G., Gilfoyle, G., Giovanetti, K., Girod, F., Goetz, J., Gonenc, A., Gothe, R., Griffioen, K., Guidal, M., Guler, N., Guo, L., Gyurjyan, V., Hakobyan, R., Hersman, F., Hleiqawi, I., Holtrop, M., Hyde-Wright, C., Ilieva, Y., Ireland, D., Ishkhanov, B., Ito, M., Jenkins, D., Jo, H., Joo, K., Juengst, H., Kellie, J., Khandaker, M., Kim, W., Klein, A., Klein, F., Kossov, M., Kramer, L., Kubarovsky, V., Kuhn, J., Kuhn, S., Kuleshov, S., Lachniet, J., Langheinrich, J., Lawrence, D., Livingston, K., Lu, H., MacCormick, M., Mecking, B., Meyer, C., Mikhailov, K., Miskimen, R., Mokeev, V., Morrow, S., Moteabbed, M., Mutchler, G., Nakagawa, I., Nadel-Turonski, P., Nasseripour, R., 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., Pogorelko, O., Pozdniakov, S., Price, J., Prok, Y., Protopopescu, D., Raue, B., Ricco, G., Ripani, M., Ritchie, B., Ronchetti, F., Rosner, G., Sabatie, F., Salgado, C., Santoro, J., Sapunenko, V., Schumacher, R., Serov, V., Sharabian, Y., Smith, E., Smith, L., Sober, D., Stavinsky, A., Stepanyan, S., Stokes, B., Stoler, P., Strakovsky, I., Strauch, S., Taiuti, M., Teymurazyan, A., Thoma, U., Tkabladze, A., Tkachenko, S., Tur, C., Ungaro, M., Vineyard, M., Vlassov, A., Weinstein, L., Weygand, D., Williams, M., Wolin, E., Wood, M., Yegneswaran, A., Zana, L., Zhang, J., Zhao, B., Zhao, Z., and CLASS 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:01 June 2006

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