| Internal Note and Article | |
| Report number | arXiv:0708.0415 ; CERN-PH-EP-2007-017 ; CERN-DELPHI-2006-012-CONF-758 ; DELPHI-2006-012-CONF-758 ; CERN-DELPHI-PAPER-364 ; CERN-PH-EP-2007-017 |
| Title | Search for Pentaquarks in the Hadronic Decays of the Z Boson with the DELPHI Detector at LEP |
| Related title | PENTAQUARK |
| Author(s) |
Abdallah, J. ; Abreu, P. ; Adam, W. ; Adzic, P. ; Albrecht, T. ; Alemany-Fernandez, R. ; Allmendinger, T. ; Allport, P.P. ; Amaldi, U. ; Amapane, N. ; Amato, S. ; Anashkin, E. ; Andreazza, A. ; Andringa, S. ; Anjos, N. ; Antilogus, P. ; Apel, W.-D. ; Arnoud, Y. ; Ask, S. ; Asman, B. ; Augustin, J.E. ; Augustinus, A. ; Baillon, P. ; Ballestrero, A. ; Bambade, P. ; Barbier, R. ; Bardin, D. ; Barker, G.J. ; Baroncelli, A. ; Battaglia, M. ; Baubillier, M. ; Becks, K.-H. ; Begalli, M. ; Behrmann, A. ; Ben-Haim, E. ; Benekos, N. ; Benvenuti, A. ; Berat, C. ; Berggren, M. ; Bertrand, D. ; Besancon, M. ; Besson, N. ; Bloch, D. ; Blom, M. ; Bluj, M. ; Bonesini, M. ; Boonekamp, M. ; Booth, P.S.L. ; Borisov, G. ; Botner, O. ; Bouquet, B. ; Bowcock, T.J.V. ; Boyko, I. ; Bracko, M. ; Brenner, R. ; Brodet, E. ; Bruckman, P. ; Brunet, J.M. ; Buschbeck, B. ; Buschmann, P. ; Calvi, M. ; Camporesi, T. ; Canale, V. ; Carena, F. ; Castro, Nuno Filipe ; Cavallo, F. ; Chapkin, M. ; Charpentier, Ph. ; Checchia, P. ; Chierici, R. ; Chliapnikov, P. ; Chudoba, J. ; Chung, S.U. ; Cieslik, K. ; Collins, P. ; Contri, R. ; Cosme, G. ; Cossutti, F. ; Costa, M.J. ; Crennell, D. ; Cuevas, J. ; D'Hondt, J. ; da Silva, T. ; Da Silva, W. ; Della Ricca, G. ; De Angelis, A. ; De Boer, W. ; De Clercq, C. ; De Lotto, B. ; De Maria, N. ; De Min, A. ; de Paula, L. ; Di Ciaccio, L. ; Di Simone, A. ; Doroba, K. ; Drees, J. ; Eigen, G. ; Ekelof, T. ; Ellert, M. ; Elsing, M. ; Espirito Santo, M.C. ; Fanourakis, G. ; Fassouliotis, D. ; Feindt, M. ; Fernandez, J. ; Ferrer, A. ; Ferro, F. ; Flagmeyer, U. ; Foeth, H. ; Fokitis, E. ; Fulda-Quenzer, F. ; Fuster, J. ; Gandelman, M. ; Garcia, C. ; Gavillet, Ph. ; Gazis, E. ; Gokieli, R. ; Golob, B. ; Gomez-Ceballos, G. ; Goncalves, P. ; Graziani, E. ; Grosdidier, G. ; Grzelak, K. ; Guy, J. ; Haag, C. ; Hallgren, A. ; Hamacher, K. ; Hamilton, K. ; Haug, S. ; Hauler, F. ; Hedberg, V. ; Hennecke, M. ; Herr, H. ; Hoffman, J. ; Holmgren, S.-O. ; Holt, P.J. ; Houlden, M.A. ; Jackson, J.N. ; Jarlskog, G. ; Jarry, P. ; Jeans, D. ; Johansson, Erik Karl ; Jonsson, P. ; Joram, C. ; Jungermann, L. ; Kapusta, F. ; Katsanevas, S. ; Katsoufis, E. ; Kernel, G. ; Kersevan, B.P. ; Kerzel, U. ; King, B.T. ; Kjaer, N.J. ; Kluit, P. ; Kokkinias, P. ; Kourkoumelis, C. ; Kouznetsov, O. ; Krumstein, Z. ; Kucharczyk, M. ; Lamsa, J. ; Leder, G. ; Ledroit, F. ; Leinonen, L. ; Leitner, R. ; Lemonne, J. ; Lepeltier, V. ; Lesiak, T. ; Liebig, W. ; Liko, D. ; Lipniacka, A. ; Lopes, J.H. ; Lopez, J.M. ; Loukas, D. ; Lutz, P. ; Lyons, L. ; MacNaughton, J. ; Malek, A. ; Maltezos, S. ; Mandl, F. ; Marco, J. ; Marco, R. ; Marechal, B. ; Margoni, M. ; Marin, J.-C. ; Mariotti, C. ; Markou, A. ; Martinez-Rivero, C. ; Masik, J. ; Mastroyiannopoulos, N. ; Matorras, F. ; Matteuzzi, C. ; Mazzucato, F. ; Mazzucato, M. ; Mc Nulty, R. ; Meroni, C. ; Migliore, E. ; Mitaroff, W. ; Mjoernmark, U. ; Moa, T. ; Moch, M. ; Monig, Klaus ; Monge, R. ; Montenegro, J. ; Moraes, D. ; Moreno, S. ; Morettini, P. ; Mueller, U. ; Muenich, K. ; Mulders, M. ; Mundim, L. ; Murray, W. ; Muryn, B. ; Myatt, G. ; Myklebust, T. ; Nassiakou, M. ; Navarria, F. ; Nawrocki, K. ; Nicolaidou, R. ; Nikolenko, M. ; Oblakowska-Mucha, A. ; Obraztsov, V. ; Olshevski, A. ; Onofre, A. ; Orava, R. ; Osterberg, K. ; Ouraou, A. ; Oyanguren, A. ; Paganoni, M. ; Paiano, S. ; Palacios, J.P. ; Palka, H. ; Papadopoulou, Th.D. ; Pape, L. ; Parkes, C. ; Parodi, F. ; Parzefall, U. ; Passeri, A. ; Passon, O. ; Peralta, L. ; Perepelitsa, V. ; Perrotta, A. ; Petrolini, A. ; Piedra, J. ; Pieri, L. ; Pierre, F. ; Pimenta, M. ; Piotto, E. ; Podobnik, T. ; Poireau, V. ; Pol, M.E. ; Polok, G. ; Pozdniakov, V. ; Pukhaeva, N. ; Pullia, A. ; Rames, J. ; Read, A. ; Rebecchi, P. ; Rehn, J. ; Reid, D. ; Reinhardt, R. ; Renton, P. ; Richard, F. ; Ridky, J. ; Rivero, M. ; Rodriguez, D. ; Romero, A. ; Ronchese, P. ; Roudeau, P. ; Rovelli, T. ; Ruhlmann-Kleider, V. ; Ryabtchikov, D. ; Sadovsky, A. ; Salmi, L. ; Salt, J. ; Sander, C. ; Savoy-Navarro, A. ; Schwickerath, U. ; Sekulin, R. ; Siebel, M. ; Sisakian, A. ; Smadja, G. ; Smirnova, O. ; Sokolov, A. ; Sopczak, A. ; Sosnowski, R. ; Spassov, T. ; Stanitzki, M. ; Stocchi, A. ; Strauss, J. ; Stugu, B. ; Szczekowski, M. ; Szeptycka, M. ; Szumlak, T. ; Tabarelli, T. ; Tegenfeldt, F. ; Timmermans, Jan ; Tkatchev, L. ; Tobin, M. ; Todorovova, S. ; Tome, B. ; Tonazzo, A. ; Tortosa, P. ; Travnicek, P. ; Treille, D. ; Tristram, G. ; Trochimczuk, M. ; Troncon, C. ; Turluer, M.-L. ; Tyapkin, I.A. ; Tyapkin, P. ; Tzamarias, S. ; Uvarov, V. ; Valenti, G. ; Van Dam, P. ; Van Eldik, J. ; van Remortel, N. ; Van Vulpen, I. ; Vegni, G. ; Veloso, F. ; Venus, W. ; Verdier, P. ; Verzi, V. ; Vilanova, D. ; Vitale, L. ; Vrba, V. ; Wahlen, H. ; Washbrook, A.J. ; Weiser, C. ; Wicke, D. ; Wickens, J. ; Wilkinson, G. ; Winter, M. ; Witek, M. ; Yushchenko, O. ; Zalewska, A. ; Zalewski, P. ; Zavrtanik, D. ; Zhuravlov, V. ; Zimine, N.I. ; Zintchenko, A. ; Zupan, M. |
| Affiliation | (Iowa State University, Ames, USA) ; (IIHE, ULB-VUB, Pleinlaan, Brussels, Belgium) ; (Physics Laboratory, University of Athens, Solonos Str., Athens, Greece) ; (Department of Physics, University of Bergen, Allegaten, Bergen, Norway) ; (Dipartimento di Fisica, Universita di Bologna and INFN, Via Irnerio, Bologna, Italy) ; (Centro Brasileiro de Pesquisas Fisicas, rua Xavier Sigaud, Rio de Janeiro, Brazil) ; (Inst. de Fisica, Univ. Estadual do Rio de Janeiro, rua Sao Francisco Xavier, Rio de Janeiro, Brazil) ; (College de France, Lab. de Physique Corpusculaire, IN2P3-CNRS, Paris Cedex, France) ; (CERN) ; (Institut de Recherches Subatomiques, IN2P3 - CNRS/ULP, Strasbourg Cedex, France) ; (Now at DESY-Zeuthen, Platanenallee, Zeuthen, Germany) ; (Institute of Nuclear Physics, N.C.S.R. Demokritos, Athens, Greece) ; (FZU, Inst. of Phys. of the C.A.S. High Energy Physics Division, Slovance, Praha, Czech Republic) ; (Dipartimento di Fisica, Universita di Genova and INFN, Via Dodecaneso, Genova, Italy) ; (Institut des Sciences Nucleaires, IN2P3-CNRS, Universite de Grenoble, Grenoble, France) ; (Helsinki Institute of Physics and Department of Physical Sciences, University of Helsinki, Finland) ; (Joint Institute for Nuclear Research, Dubna, Head Post Office, Moscow, Russian Federation) ; (Institut fur Experimentelle Kernphysik, Universitat Karlsruhe, Postfach, Karlsruhe, Germany) ; (Institute of Nuclear Physics PAN,Ul. Radzikowskiego, Krakow, Poland) ; (Faculty of Physics and Nuclear Techniques, University of Mining and Metallurgy, Krakow, Poland) ; (Universite de Paris-Sud, Lab. de l'Accelerateur Lineaire, IN2P3-CNRS, Bat., Orsay, France) ; (School of Physics and Chemistry, University of Lancaster, Lancaster, UK) ; (LIP, IST, FCUL - Av. Elias Garcia, Lisboa Codex, Portugal) ; (Department of Physics, University of Liverpool, Liverpool, UK) ; (Dept. of Physics and Astronomy, Kelvin Building, University of Glasgow, Glasgow, UK) ; (LPNHE, IN2P3-CNRS, Univ. Paris VI et VII, Tour (RdC), Paris Cedex, France) ; (Department of Physics, University of Lund, Solvegatan, Lund, Sweden) ; (Universite Claude Bernard de Lyon, IPNL, IN2P3-CNRS, FR- Villeurbanne Cedex, France) ; (Dipartimento di Fisica, Universita di Milano and INFN-MILANO, Via Celoria, Milan, Italy) ; (Dipartimento di Fisica, Univ. di Milano-Bicocca and INFN-MILANO, Piazza della Scienza, Milan, Italy) ; (IPNP of MFF, Charles Univ., Areal, V Holesovickach, Praha, Czech Republic) ; (NIKHEF, Postbus, Amsterdam, The Netherlands) ; (National Technical University, Physics Department, Zografou Campus, Athens, Greece) ; (Physics Department, University of Oslo, Blindern, Oslo, Norway) ; (Dpto. Fisica, Univ. Oviedo, Avda. Calvo Sotelo s/n, Oviedo, Spain) ; (Department of Physics, University of Oxford, Keble Road, Oxford, UK) ; (Dipartimento di Fisica, Universita di Padova and INFN, Via Marzolo, Padua, Italy) ; (Rutherford Appleton Laboratory, Chilton, Didcot, UK) ; (Dipartimento di Fisica, Universita di Roma II and INFN, Tor Vergata, Rome, Italy) ; (Dipartimento di Fisica, Universita di Roma III and INFN, Via della Vasca Navale, Rome, Italy) ; (DAPNIA/Service de Physique des Particules, CEA-Saclay, Gif-sur-Yvette Cedex, France) ; (Instituto de Fisica de Cantabria (CSIC-UC), Avda. los Castros s/n, ES- Santander, Spain) ; (Inst. for High Energy Physics, Serpukov, Protvino, (Moscow Region), Russian Federation) ; (J. Stefan Institute, Jamova, Ljubljana, Slovenia) ; (Laboratory for Astroparticle Physics, University of Nova Gorica, Kostanjeviska, Nova Gorica, Slovenia) ; (Department of Physics, University of Ljubljana, Ljubljana, Slovenia) ; (Fysikum, Stockholm University, Stockholm, Sweden) ; (Dipartimento di Fisica Sperimentale, Universita di Torino and INFN, Via P. Giuria, Turin, Italy) ; (INFN,Sezione di Torino and Dipartimento di Fisica Teorica, Universita di Torino, Via Giuria, Turin, Italy) ; (Dipartimento di Fisica, Universita di Trieste and INFN, Via A. Valerio, Trieste, Italy) ; (Istituto di Fisica, Universita di Udine and INFN, Udine, Italy) ; (Univ. Federal do Rio de Janeiro, Cidade Univ., Ilha do Fundao Rio de Janeiro, Brazil) ; (Department of Radiation Sciences, University of Uppsala, Uppsala, Sweden) ; (IFIC, Valencia-CSIC, and D.F.A.M.N., U. de Valencia, Avda. Dr. Moliner, Burjassot (Valencia), Spain) ; (Institut fur Hochenergiephysik, Osterr. Akad. d. Wissensch., Nikolsdorfergasse, Vienna, Austria) ; (Inst. Nuclear Studies and University of Warsaw, Ul. Hoza, Warsaw, Poland) ; (Now at University of Warwick, Coventry) ; (Fachbereich Physik, University of Wuppertal, Postfach, Wuppertal, Germany) |
| Publication | 2007 |
| Imprint | 25 May 2007 |
| Number of pages | 15 |
| Note | 15 pages, 5 figures, Accepted by Phys. Lett. B |
| In: | Phys. Lett. B 653 (2007) 151-160 |
| DOI | 10.1016/j.physletb.2007.08.005 |
| Subject category | Particle Physics - Experiment |
| Accelerator/Facility, Experiment | CERN LEP ; DELPHI |
| Abstract | The quark model does not exclude states composed of more than three quarks, like pentaquark systems. Controversial evidence for such states has been published in the last years, in particular: for a strange pentaquark Theta(1540)+; for a double-strange state, the Xi(1862)--, subsequently called Phi(1860)--; and for a charmed state, the Theta_c(3100)^0. If confirmed, a full pentaquark family might exist; such pentaquark states could be produced in e+e- annihilations near the Z energy. In this paper a search for pentaquarks is described using the DELPHI detector at LEP, characterized by powerful particle identification sub-systems crucial in the separation of the signal from the background for these states. At 95% CL, upper limits are set on the production rates <N> of such particles and their charge-conjugate state per Z decay: <N_Theta+> x Br(Theta+ -> pK0_S) < 5.1 x 10^{-4} <N_Theta++> < 1.6 x 10^{-3} <N_Phi(1860)-- > x Br(Phi(1860)-- -> Xi- pi-) < 2.9 x 10^{-4} <Theta_c(3100)^0> x Br(Theta_c(3100)^0 -> D*+ pbar) < 8.8 x 10^{-4} . |
| Copyright/License | Elsevier B.V. |
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