Search for a narrow baryonic state decaying to pKS0 and p‾KS0 in deep inelastic scattering at HERA

A search for a narrow baryonic state in the pKS0 and p‾KS0 system has been performed in ep collisions at HERA with the ZEUS detector using an integrated luminosity of 358pb−1 taken in 2003–2007. The search was performed with deep inelastic scattering events at an ep centre-of-mass energy of 318GeV f...

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Veröffentlicht in:	Physics letters. B 2016-08, Vol.759 (C), p.446-453
Hauptverfasser:	Abramowicz, H., Abt, I., Behnke, O., Behrens, U., Bertolin, A., Bhadra, S., Bloch, I., Boos, E.G., Brook, N.H., Brugnera, R., Bruni, A., Bussey, P.J., Caldwell, A., Capua, M., Chwastowski, J., Ciborowski, J., Ciesielski, R., Cooper-Sarkar, A.M., Corradi, M., Dementiev, R.K., Devenish, R.C.E., Dusini, S., Gach, G., Gallo, E., Garfagnini, A., Geiser, A., Gizhko, A., Gladilin, L.K., Golubkov, Yu.A., Guzik, M., Gwenlan, C., Hain, W., Hlushchenko, O., Hochman, D., Hori, R., Ibrahim, Z.A., Iga, Y., Ishitsuka, M., Kadenko, I., Karshon, U., Kaur, P., Klanner, R., Korzhavina, I.A., Kotański, A., Kötz, U., Kovalchuk, N., Kowalski, H., Krupa, B., Levchenko, B.B., Levy, A., Limentani, S., Lisovyi, M., Löhr, B., Lohrmann, E., Lontkovskyi, D., Lukina, O.Yu, Makarenko, I., Malka, J., Mohammad Nasir, N., Myronenko, V., Nagano, K., Nobe, T., Nowak, R.J., Onishchuk, Yu, Paul, E., Perlański, W., Pokrovskiy, N.S., Polini, A., Roloff, P., Saxon, D.H., Schioppa, M., Schneekloth, U., Schörner-Sadenius, T., Shcheglova, L.M., Shevchenko, R., Shkola, O., Shyrma, Yu, Singh, I., Słomiński, W., Solano, A., Stanco, L., Stefaniuk, N., Stern, A., Stopa, P., Sztuk-Dambietz, J., Tassi, E., Tokushuku, K., Tomaszewska, J., Tsurugai, T., Turcato, M., Turkot, O., Verbytskyi, A., Wan Abdullah, W.A.T., Wing, M., Yamada, S., Yamazaki, Y., Żarnecki, A.F., Zawiejski, L., Zhautykov, B.O., Zotkin, D.S.
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Sprache:	eng
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Zusammenfassung:	A search for a narrow baryonic state in the pKS0 and p‾KS0 system has been performed in ep collisions at HERA with the ZEUS detector using an integrated luminosity of 358pb−1 taken in 2003–2007. The search was performed with deep inelastic scattering events at an ep centre-of-mass energy of 318GeV for exchanged photon virtuality, Q2, between 20 and 100GeV2. Contrary to evidence presented for such a state around 1.52 GeV in a previous ZEUS analysis using a sample of 121 pb−1 taken in 1996–2000, no resonance peak was found in the p(p‾)KS0 invariant-mass distribution in the range 1.45–1.7 GeV. Upper limits on the production cross section are set.
ISSN:	0370-2693 1873-2445
DOI:	10.1016/j.physletb.2016.06.001