Observation of an exotic S=+1 baryon in exclusive photoproduction from the deuteron

Stepanyan, S. et al. (2003) Observation of an exotic S=+1 baryon in exclusive photoproduction from the deuteron. Physical Review Letters, 91(25), p. 252001. (doi: 10.1103/PhysRevLett.91.252001)

Abstract

In an exclusive measurement of the reaction gamma d to K/sup +/K/sup -/pn, a narrow peak that can be attributed to an exotic baryon with strangeness S=+1 is seen in the K/sup +/n invariant mass spectrum. The peak is at 1.542+or-0.005 GeV/c/sup 2/ with a measured width of 0.021 GeV/c/sup 2/ FWHM, which is largely determined by experimental mass resolution. The statistical significance of the peak is (5.2+or-0.6) sigma . The mass and width of the observed peak are consistent with recent reports of a narrow S=+1 baryon by other experimental groups.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Livingston, Dr Kenneth and Protopopescu, Dr Dan and Melone, Dr Joseph
• Authors: Stepanyan, S., Hicks, K., Carman, D.S., Pasyuk, E., Schumacher, R.A., Smith, E.S., Tedeschi, D.J., Todor, L., Adams, G., Ambrozewicz, P., Anciant, E., Anghinolfi, M., Asavapibhop, B., Audit, G., Avakian, H., Bagdasaryan, H., Ball, J.P., Barrow, S.P., Battaglieri, M., Beard, K., Bektasoglu, M., Bellis, M., Berman, B.L., Bianchi, N., Biselli, A.S., Boiarinov, S., Bouchigny, S., Bradford, R., Branford, D., Briscoe, W.J., Brooks, W.K., Burkert, V.D., Butuceanu, C., Calarco, J.R., Carnahan, B., Chen, S., Ciciani, L., Cole, P.L., Coleman, A., Cords, D., Corvisiero, P., Crabb, D., Crannell, H., Cummings, J.P., De Sanctis, E., Degtyarenko, P.V., Denizli, H., Dennis, L., De Vita, R., Dharmawardane, K.V., Dhuga, K.S., Djalali, C., Dodge, G.E., Doughty, D., Dragovitsch, P., Dugger, M., Dytman, S., Dzyubak, O.P., Egiyan, H., Egiyan, K.S., Elouadrhiri, L., Empl, A., Eugenio, P., Fatemi, R., Feuerbach, R.J., Ficenec, J., Forest, T.A., Funsten, H., Garcon, M., Gavalian, G., Gilfoyle, G.P., Giovanetti, K.L., Gordon, C.I.O., Gothe, R., Griffioen, K., Guidal, M., Guillo, M., Guo, L., Gyurjyan, V., Hadjidakis, C., Hakobyan, R.S., Hardie, J., Heddle, D., Heimberg, P., Hersman, F.W., Hicks, R.S., Holtrop, M., Hu, J., Hyde-Wright, C.E., Ito, M.M., Jenkins, D., Joo, K., Juengst, H.G., Kellie, J.D., Khandaker, M., Kim, K.Y., Kim, K., Kim, W., Klein, A., Klein, F.J., Klimenko, A.V., Klusman, M., Kossov, M., Kramer, L.H., Kuang, Y., Kubarovsky, V., Kuhn, S.E., Kuhn, J., Lachniet, J., Lawrence, D., Li, J., Lima, A., Livingston, K., Lukashin, K., Manak, J.J., McAleer, S., McNabb, J.W.C., Mecking, B.A., Mehrabyan, S., Melone, J.J., Mestayer, M.D., Meyer, C.A., Mikhailov, K., Minehart, R., Mirazita, M., Miskimen, R., Mokeev, V., Morand, L., Morrow, S., Muccifora, V., Mueller, J., Murphy, L.Y., Mutchler, G.S., Napolitano, J., Nasseripour, R., Niccolai, S., Niculescu, G., Niculescu, I., Niczyporuk, B.B., Niyazov, R.A., Nozar, M., O'Brien, J., O'Rielly, G.V., Opper, A.K., Osipenko, M., Park, K., Peterson, G., Philips, S.A., Pivnyuk, N., Pocanic, D., Pogorelko, O., Polli, E., Pozdniakov, S., Preedom, B.M., Price, J.W., Prok, Y., Protopopescu, D., Qin, L.M., Raue, B.A., Riccardi, G., Ricco, G., Ripani, M., Ritchie, B.G., Ronchetti, F., Rossi, P., Rowntree, D., Rubin, P., Sabatie, F., Salgado, C., Santoro, J., Sapunenko, V., Serov, V.S., Sharabian, Y.G., Shaw, J., Simionatto, S., Skabelin, A.V., Smith, L.C., Sober, D.I., Strakovsky, I.I., Stavinsky, A., Stoler, P., Suleiman, R., Taiuti, M., Taylor, S., Thoma, U., Thompson, R., Tur, C., Ungaro, M., Vineyard, M.F., Vlassov, A.V., Wang, K., Weinstein, L.B., Weller, H., Weygand, D.P., Whisnant, C.S., Wolin, E., Wood, M.H., Yegneswaran, A., and Yun, J.
• Subjects: Q Science > QC Physics
• 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