Search for a narrow baryonic resonance decaying to Ks0p or Ks0p¯ in deep inelastic scattering at HERA

• Published in: Physics letters. B Vol. 639; no. 3-4; pp. 202 - 209
• Main Authors: Antunovic, B., Aplin, S., Baranov, P., Bartel, W., Behrendt, O., Belousov, A., Bizot, J.C., Brandt, G., Brisson, V., Bruncko, D., Buschhorn, G., Campbell, A.J., Contreras, J.G., Coughlan, J.A., Cozzika, G., Daum, K., de Boer, Y., Delcourt, B., De Roeck, A., De Wolf, E.A., Eckerlin, G., Efremenko, V., Faulkner, P.J.W., Fedotov, A., Ferencei, J., Flucke, G., Frisson, T., Gabathuler, E., Gerlich, C., Ghazaryan, S., Goerlich, L., Greenshaw, T., Grindhammer, G., Gwilliam, C., Haidt, D., Hajduk, L., Hildebrandt, M., Hovhannisyan, A., Hreus, T., Janauschek, L., Janssen, X., Jönsson, L., Jung, A.W., Kapichine, M., Katzy, J., Klimkovich, T., Korbel, V., Lange, W., Lebedev, A., Lendermann, V., Lindfeld, L., Liptaj, A., List, B., Lucaci-Timoce, A.-I., Lux, T., Makankine, A., Malden, N., Malinovski, E., Marage, P., Marshall, R., Maxfield, S.J., Meier, K., Meyer, A.B., Michels, V., Milstead, D., Mozer, M.U., Müller, K., Nozicka, M., Oganezov, R., Olivier, B., Olsson, J.E., Patel, G.D., Perez-Astudillo, D., Perieanu, A., Plačakytė, R., Portheault, B., Rahmat, A.J., Rimmer, A., Robmann, P., Rostovtsev, A., Sauvan, E., Schöning, A., Smirnov, P., South, D., Specka, A., Stella, B., Straumann, U., Toll, T., Tzamariudaki, E., Utkin, D., Van Mechelen, P., Wacker, K., Weber, G., Weber, R., Werner, C., Yan, W., Yeganov, V., Zimmermann, J., Zimmermann, T., Zohrabyan, H.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 10.08.2006
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/j.physletb.2006.06.055

A search for a narrow baryonic resonance decaying to Ks0p or Ks0p¯ is carried out in deep inelastic ep scattering with the H1 detector at HERA. Such a resonance could be a strange pentaquark Θ+, evidence for which has been reported by several experiments. The Ks0p and Ks0p¯ invariant mass distributions presented here do not show any significant peak in the mass range from threshold up to 1.7 GeV. Mass dependent upper limits on σ(ep→eΘ+X)×BR(Θ+→K0p) are obtained at the 95% confidence level.