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

Abramowicz, H. (Raymond and Beverly Sackler Faculty of Exact Sciences, School of Physics, Tel Aviv University, Tel Aviv, Israel) ; Abt, I. (Max-Planck-Institut für Physik, München, Germany) ; Adamczyk, L. (AGH–University of Science and Technology, Faculty of Physics and Applied Computer Science, Krakow, Poland) ; Adamus, M. (National Centre for Nuclear Research, Warsaw, Poland) ; Antonelli, S. (University and INFN Bologna, Bologna, Italy) ; Aushev, V. (Department of Nuclear Physics, National Taras Shevchenko University of Kyiv, Kyiv, Ukraine) ; Behnke, O. (Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany) ; Behrens, U. (Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany) ; Bertolin, A. (INFN Padova, Padova, Italy) ; Bhadra, S. (Department of Physics, York University, Ontario, M3J 1P3, Canada) ; Bloch, I. (Deutsches Elektronen-Synchrotron DESY, Zeuthen, Germany) ; Boos, E.G. (Institute of Physics and Technology of Ministry of Education and Science of Kazakhstan, Almaty, Kazakhstan) ; Brock, I. (Physikalisches Institut der Universität Bonn, Bonn, Germany) ; Brook, N.H. (Physics and Astronomy Department, University College London, London, United Kingdom) ; Brugnera, R. (Dipartimento di Fisica e Astronomia dell' Università, INFN, Padova, Italy) ; Bruni, A. (INFN Bologna, Bologna, Italy) ; Bussey, P.J. (School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom) ; Caldwell, A. (Max-Planck-Institut für Physik, München, Germany) ; Capua, M. (Calabria University, Physics Department, INFN, Cosenza, Italy) ; Catterall, C.D. (Department of Physics, York University, Ontario, M3J 1P3, Canada) ; Chwastowski, J. (The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Poland) ; Ciborowski, J. (Faculty of Physics, University of Warsaw, Warsaw, Poland) ; Ciesielski, R. (Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany) ; Cooper-Sarkar, A.M. (Department of Physics, University of Oxford, Oxford, United Kingdom) ; Corradi, M. (INFN Bologna, Bologna, Italy) ; Dementiev, R.K. (Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics, Moscow, Russia) ; Devenish, R.C.E. (Department of Physics, University of Oxford, Oxford, United Kingdom) ; Dusini, S. (INFN Padova, Padova, Italy) ; Foster, B. (Hamburg University, Institute of Experimental Physics, Hamburg, Germany) ; Gach, G. (AGH–University of Science and Technology, Faculty of Physics and Applied Computer Science, Krakow, Poland) ; Gallo, E. (Hamburg University, Institute of Experimental Physics, Hamburg, Germany) ; Garfagnini, A. (Dipartimento di Fisica e Astronomia dell' Università, INFN, Padova, Italy) ; Geiser, A. (Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany) ; Gizhko, A. (Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany) ; Gladilin, L.K. (Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics, Moscow, Russia) ; Golubkov, Yu.A. (Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics, Moscow, Russia) ; Grzelak, G. (Faculty of Physics, University of Warsaw, Warsaw, Poland) ; Guzik, M. (AGH–University of Science and Technology, Faculty of Physics and Applied Computer Science, Krakow, Poland) ; Gwenlan, C. (Department of Physics, University of Oxford, Oxford, United Kingdom) ; Hain, W. (Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany) ; Hlushchenko, O. (Department of Nuclear Physics, National Taras Shevchenko University of Kyiv, Kyiv, Ukraine) ; Hochman, D. (Department of Particle Physics and Astrophysics, Weizmann Institute, Rehovot, Israel) ; Hori, R. (Institute of Particle and Nuclear Studies, KEK, Tsukuba, Japan) ; Ibrahim, Z.A. (National Centre for Particle Physics, Universiti Malaya, Kuala Lumpur, 50603, Malaysia) ; Iga, Y. (Polytechnic University, Tokyo, Japan) ; Ishitsuka, M. (Department of Physics, Tokyo Institute of Technology, Tokyo, Japan) ; Januschek, F. (Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany) ; Jomhari, N.Z. (National Centre for Particle Physics, Universiti Malaya, Kuala Lumpur, 50603, Malaysia) ; Kadenko, I. (Department of Nuclear Physics, National Taras Shevchenko University of Kyiv, Kyiv, Ukraine) ; Kananov, S. (Raymond and Beverly Sackler Faculty of Exact Sciences, School of Physics, Tel Aviv University, Tel Aviv, Israel) ; Karshon, U. (Department of Particle Physics and Astrophysics, Weizmann Institute, Rehovot, Israel) ; Kaur, P. (Panjab University, Department of Physics, Chandigarh, India) ; Kisielewska, D. (AGH–University of Science and Technology, Faculty of Physics and Applied Computer Science, Krakow, Poland) ; Klanner, R. (Hamburg University, Institute of Experimental Physics, Hamburg, Germany) ; Klein, U. (Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany) ; Korzhavina, I.A. (Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics, Moscow, Russia) ; Kotański, A. (Department of Physics, Jagellonian University, Krakow, Poland) ; Kötz, U. (Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany) ; Kovalchuk, N. (Hamburg University, Institute of Experimental Physics, Hamburg, Germany) ; Kowalski, H. (Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany) ; Krupa, B. (The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Poland) ; Kuprash, O. (Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany) ; Kuze, M. (Department of Physics, Tokyo Institute of Technology, Tokyo, Japan) ; Levchenko, B.B. (Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics, Moscow, Russia) ; Levy, A. (Raymond and Beverly Sackler Faculty of Exact Sciences, School of Physics, Tel Aviv University, Tel Aviv, Israel) ; Limentani, S. (Dipartimento di Fisica e Astronomia dell' Università, INFN, Padova, Italy) ; Lisovyi, M. (Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany) ; Lobodzinska, E. (Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany) ; Löhr, B. (Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany) ; Lohrmann, E. (Hamburg University, Institute of Experimental Physics, Hamburg, Germany) ; Longhin, A. (INFN Padova, Padova, Italy) ; Lontkovskyi, D. (Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany) ; Lukina, O.Yu. (Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics, Moscow, Russia) ; Makarenko, I. (Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany) ; Malka, J. (Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany) ; Mastroberardino, A. (Calabria University, Physics Department, INFN, Cosenza, Italy) ; Mohamad Idris, F. (National Centre for Particle Physics, Universiti Malaya, Kuala Lumpur, 50603, Malaysia) ; Mohammad Nasir, N. (National Centre for Particle Physics, Universiti Malaya, Kuala Lumpur, 50603, Malaysia) ; Myronenko, V. (Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany) ; Nagano, K. (Institute of Particle and Nuclear Studies, KEK, Tsukuba, Japan) ; Nobe, T. (Department of Physics, Tokyo Institute of Technology, Tokyo, Japan) ; Nowak, R.J. (Faculty of Physics, University of Warsaw, Warsaw, Poland) ; Onishchuk, Yu. (Department of Nuclear Physics, National Taras Shevchenko University of Kyiv, Kyiv, Ukraine) ; Paul, E. (Physikalisches Institut der Universität Bonn, Bonn, Germany) ; Perlański, W. (Faculty of Physics, University of Warsaw, Warsaw, Poland) ; Pokrovskiy, N.S. (Institute of Physics and Technology of Ministry of Education and Science of Kazakhstan, Almaty, Kazakhstan) ; Polini, A. (INFN Bologna, Bologna, Italy) ; Przybycień, M. (AGH–University of Science and Technology, Faculty of Physics and Applied Computer Science, Krakow, Poland) ; Roloff, P. (Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany) ; Ruspa, M. (Università del Piemonte Orientale, Novara, INFN, Torino, Italy) ; Saxon, D.H. (School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom) ; Schioppa, M. (Calabria University, Physics Department, INFN, Cosenza, Italy) ; Schneekloth, U. (Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany) ; Schörner-Sadenius, T. (Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany) ; Shcheglova, L.M. (Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics, Moscow, Russia) ; Shevchenko, R. (Department of Nuclear Physics, National Taras Shevchenko University of Kyiv, Kyiv, Ukraine) ; Shkola, O. (Department of Nuclear Physics, National Taras Shevchenko University of Kyiv, Kyiv, Ukraine) ; Shyrma, Yu. (Institute for Nuclear Research, National Academy of Sciences, Kyiv, Ukraine) ; Singh, I. (Panjab University, Department of Physics, Chandigarh, India) ; Skillicorn, I.O. (School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom) ; Słomiński, W. (Department of Physics, Jagellonian University, Krakow, Poland) ; Solano, A. (Università di Torino, INFN, Torino, Italy) ; Stanco, L. (INFN Padova, Padova, Italy) ; Stefaniuk, N. (Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany) ; Stern, A. (Raymond and Beverly Sackler Faculty of Exact Sciences, School of Physics, Tel Aviv University, Tel Aviv, Israel) ; Stopa, P. (The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Poland) ; Sztuk-Dambietz, J. (Hamburg University, Institute of Experimental Physics, Hamburg, Germany) ; Tassi, E. (Calabria University, Physics Department, INFN, Cosenza, Italy) ; Tokushuku, K. (Institute of Particle and Nuclear Studies, KEK, Tsukuba, Japan) ; Tomaszewska, J. (Faculty of Physics, University of Warsaw, Warsaw, Poland) ; Tsurugai, T. (Meiji Gakuin University, Faculty of General Education, Yokohama, Japan) ; Turcato, M. (Hamburg University, Institute of Experimental Physics, Hamburg, Germany) ; Turkot, O. (Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany) ; Tymieniecka, T. (National Centre for Nuclear Research, Warsaw, Poland) ; Verbytskyi, A. (Max-Planck-Institut für Physik, München, Germany) ; Wan Abdullah, W.A.T. (National Centre for Particle Physics, Universiti Malaya, Kuala Lumpur, 50603, Malaysia) ; Wichmann, K. (Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany) ; Wing, M. (Physics and Astronomy Department, University College London, London, United Kingdom) ; Yamada, S. (Institute of Particle and Nuclear Studies, KEK, Tsukuba, Japan) ; Yamazaki, Y. (Institute of Particle and Nuclear Studies, KEK, Tsukuba, Japan) ; Zakharchuk, N. (Department of Nuclear Physics, National Taras Shevchenko University of Kyiv, Kyiv, Ukraine) ; Żarnecki, A.F. (Faculty of Physics, University of Warsaw, Warsaw, Poland) ; Zawiejski, L. (The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Poland) ; Zenaiev, O. (Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany) ; Zhautykov, B.O. (Institute of Physics and Technology of Ministry of Education and Science of Kazakhstan, Almaty, Kazakhstan) ; Zotkin, D.S. (Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics, Moscow, Russia)

09 June 2016

Abstract: 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.


Published in: Physics letters B (2016)
Published by: Elsevier
DOI: 10.1016/j.physletb.2016.06.001
License: CC-BY-3.0



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