Página principal > DELPHI Preprints > Search for a fourth generation b'-quark at LEP-II at sqrt{s}=196-209 GeV |
Article | |
Report number | arXiv:0704.0594 ; CERN-PH-EP-2006-023 ; CERN-PH-EP-2006-023 |
Title | Search for a fourth generation b'-quark at LEP-II at sqrt{s}=196-209 GeV |
Related title | LEP-2 GEV |
Author(s) |
Abdallah, J. (Paris U., VI-VII) ; Abreu, P. (LIP, Lisbon) ; Adam, W. (Vienna, OAW) ; Adzic, P. (Democritos Nucl. Res. Ctr.) ; Albrecht, T. (Karlsruhe U.) ; Alemany-Fernandez, R. (CERN) ; Allmendinger, T. (Karlsruhe U.) ; Allport, P.P. (Liverpool U.) ; Amaldi, U. (Milan Bicocca U. ; INFN, Milan Bicocca) ; Amapane, N. (INFN, Turin) ; Amato, S. (Rio de Janeiro Federal U.) ; Anashkin, E. (Padua U. ; INFN, Padua) ; Andreazza, A. (Milan U. ; INFN, Milan) ; Andringa, S. (LIP, Lisbon) ; Anjos, N. (LIP, Lisbon) ; Antilogus, P. (Paris U., VI-VII) ; Apel, W-D. (Karlsruhe U.) ; Arnoud, Y. (LPSC, Grenoble) ; Ask, S. (Lund U.) ; Asman, B. (Stockholm U.) ; Augustin, J.E. (Paris U., VI-VII) ; Augustinus, A. (CERN) ; Baillon, P. (CERN) ; Ballestrero, A. (Turin U.) ; Bambade, P. (Orsay, LAL) ; Barbier, R. (Lyon, IPN) ; Bardin, D. (Dubna, JINR) ; Barker, G.J. (Warwick U.) ; Baroncelli, A. (INFN, Rome3) ; Battaglia, M. (CERN) ; Baubillier, M. (Paris U., VI-VII) ; Becks, K-H. (Wuppertal U.) ; Begalli, M. (Rio de Janeiro State U.) ; Behrmann, A. (Wuppertal U.) ; Ben-Haim, E. (Orsay, LAL) ; Benekos, N. (Natl. Tech. U., Athens) ; Benvenuti, A. (INFN, Bologna) ; Berat, C. (LPSC, Grenoble) ; Berggren, M. (Paris U., VI-VII) ; Berntzon, L. (Stockholm U.) ; Bertrand, D. (Brussels U., IIHE) ; Besancon, M. (DAPNIA, Saclay) ; Besson, N. (DAPNIA, Saclay) ; Bloch, D. (Strasbourg, IReS) ; Blom, M. (NIKHEF, Amsterdam) ; Bluj, M. (Warsaw U.) ; Bonesini, M. (Milan Bicocca U. ; INFN, Milan Bicocca) ; Boonekamp, M. (DAPNIA, Saclay) ; Booth, P.S.L. (Liverpool U.) ; Borisov, G. (Lancaster U.) ; Botner, O. (Uppsala U.) ; Bouquet, B. (Orsay, LAL) ; Bowcock, T.J.V. (Liverpool U.) ; Boyko, I. (Dubna, JINR) ; Bracko, M. (Stefan Inst., Ljubljana) ; Brenner, R. (Uppsala U.) ; Brodet, E. (Oxford U.) ; Bruckman, P. (Cracow, INP) ; Brunet, J.M. (College de France) ; Buschbeck, B. (Vienna, OAW) ; Buschmann, P. (Wuppertal U.) ; Calvi, M. (Milan Bicocca U. ; INFN, Milan Bicocca) ; Camporesi, T. (CERN) ; Canale, V. (INFN, Rome2) ; Carena, F. (CERN) ; Castro, Nuno Filipe (LIP, Lisbon) ; Cavallo, F. (INFN, Bologna) ; Chapkin, M. (Serpukhov, IHEP ; CERN) ; Charpentier, Ph. (Serpukhov, IHEP ; CERN) ; Charpentier, Ph. (CERN ; INFN, Padua) ; Checchia, P. (Padua U. ; INFN, Padua) ; Chierici, R. (CERN) ; Chudoba, J. (CERN) ; Chliapnikov, P. (Serpukhov, IHEP) ; Chudoba, J. (CERN) ; Chung, S.U. (CERN) ; Cieslik, K. (Cracow, INP ; INFN, Genoa) ; Collins, P. (CERN) ; Contri, R. (Genoa U. ; INFN, Genoa) ; Cosme, G. (Orsay, LAL ; Valencia U.) ; Cossutti, F. (Trieste U.) ; Costa, M.J. (Valencia U., IFIC ; Valencia U.) ; Crennell, D. (Rutherford) ; Cuevas, J. (Oviedo U.) ; D'Hondt, J. (Brussels U., IIHE) ; Dalmau, J. (Stockholm U.) ; da Silva, T. (Rio de Janeiro Federal U.) ; Da Silva, W. (Paris U., VI-VII ; INFN, Udine) ; Della Ricca, G. (Trieste U.) ; De Angelis, A. (Udine U. ; INFN, Udine) ; De Boer, W. (Karlsruhe U. ; INFN, Udine) ; De Clercq, C. (Brussels U., IIHE) ; De Lotto, B. (Udine U. ; INFN, Udine) ; De Maria, N. (INFN, Turin) ; De Min, A. (Padua U. ; INFN, Padua) ; de Paula, L. (Rio de Janeiro Federal U.) ; Di Ciaccio, L. (INFN, Rome2) ; Di Simone, A. (INFN, Rome3) ; Doroba, K. (Warsaw U.) ; Eigen, G. (Bergen U.) ; Ekelof, T. (Uppsala U.) ; Ellert, M. (Uppsala U.) ; Elsing, M. (CERN) ; Santo, M.C.Espirito (LIP, Lisbon) ; Fanourakis, G. (Democritos Nucl. Res. Ctr.) ; Feindt, M. (Karlsruhe U. ; Valencia U.) ; Fernandez, J. (Cantabria Inst. of Phys. ; INFN, Genoa) ; Ferrer, A. (Valencia U., IFIC ; Valencia U.) ; Ferro, F. (Genoa U. ; INFN, Genoa) ; Flagmeyer, U. (Wuppertal U.) ; Foeth, H. (CERN) ; Fokitis, E. (Natl. Tech. U., Athens ; Valencia U.) ; Fulda-Quenzer, F. (Orsay, LAL) ; Fuster, J. (Valencia U., IFIC ; Valencia U.) ; Gandelman, M. (Rio de Janeiro Federal U.) ; Garcia, C. (Valencia U., IFIC ; Valencia U.) ; Gavillet, Ph. (CERN) ; Gazis, E. (Natl. Tech. U., Athens) ; Gomez-Ceballos, G. (Cantabria Inst. of Phys.) ; Goncalves, P. (LIP, Lisbon) ; Graziani, E. (INFN, Rome3) ; Grosdidier, G. (Orsay, LAL) ; Grzelak, K. (Warsaw U.) ; Guy, J. (Rutherford) ; Haag, C. (Karlsruhe U.) ; Hallgren, A. (Uppsala U.) ; Hamacher, K. (Wuppertal U.) ; Hamilton, K. (Oxford U.) ; Haug, S. (Oslo U.) ; Hauler, F. (Karlsruhe U.) ; Hedberg, V. (Lund U.) ; Hennecke, M. (Karlsruhe U.) ; Herr, H. (CERN) ; Hoffman, J. (Warsaw U.) ; Holmgren, S-O. (Stockholm U.) ; Holt, P.J. (CERN) ; Houlden, M.A. (Liverpool U.) ; Jackson, John Neil (Liverpool U.) ; Jarlskog, G. (Lund U.) ; Jarry, P. (DAPNIA, Saclay) ; Jeans, D. (Oxford U.) ; Johansson, Erik Karl (Stockholm U.) ; Johansson, P.D. (Stockholm U.) ; Jonsson, P. (Lyon, IPN) ; Joram, C. (CERN) ; Jungermann, L. (Karlsruhe U.) ; Kapusta, F. (Paris U., VI-VII) ; Katsanevas, S. (Lyon, IPN) ; Katsoufis, E. (Natl. Tech. U., Athens) ; Kernel, G. (Stefan Inst., Ljubljana) ; Kerzel, U. (Karlsruhe U.) ; King, B.T. (Liverpool U.) ; Kjaer, N.J. (CERN) ; Kluit, P. (NIKHEF, Amsterdam) ; Kokkinias, P. (Democritos Nucl. Res. Ctr.) ; Kourkoumelis, C. (Athens U.) ; Kouznetsov, O. (Dubna, JINR) ; Krumstein, Z. (Dubna, JINR) ; Kucharczyk, M. (Cracow, INP) ; Lamsa, J. (Iowa State U.) ; Leder, G. (Vienna, OAW) ; Ledroit, F. (LPSC, Grenoble) ; Leinonen, L. (Stockholm U.) ; Leitner, R. (Charles U.) ; Lemonne, J. (Brussels U., IIHE) ; Lepeltier, V. (Orsay, LAL) ; Lesiak, T. (Cracow, INP) ; Liebig, W. (Wuppertal U.) ; Liko, D. (Vienna, OAW) ; Lipniacka, A. (Stockholm U.) ; Lopes, J.H. (Rio de Janeiro Federal U.) ; Lopez, J.M. (Oviedo U.) ; Loukas, D. (Democritos Nucl. Res. Ctr.) ; Lutz, P. (DAPNIA, Saclay) ; Lyons, L. (Oxford U.) ; MacNaughton, J. (Vienna, OAW) ; Malek, A. (Wuppertal U.) ; Maltezos, S. (Natl. Tech. U., Athens) ; Mandl, F. (Vienna, OAW) ; Marco, J. (Cantabria Inst. of Phys.) ; Marco, R. (Cantabria Inst. of Phys. ; INFN, Padua) ; Marechal, B. (Rio de Janeiro Federal U.) ; Margoni, M. (Padua U. ; INFN, Padua) ; Marin, J-C. (CERN) ; Mariotti, C. (CERN) ; Markou, A. (Democritos Nucl. Res. Ctr.) ; Martinez-Rivero, C. (Cantabria Inst. of Phys.) ; Masik, J. (Prague, Inst. Phys.) ; Mastroyiannopoulos, N. (Democritos Nucl. Res. Ctr. ; INFN, Milan Bicocca) ; Matorras, F. (Cantabria Inst. of Phys. ; INFN, Padua) ; Matteuzzi, C. (Milan Bicocca U. ; INFN, Milan Bicocca) ; Mazzucato, F. (Padua U. ; INFN, Padua) ; Mazzucato, M. (Padua U. ; INFN, Padua) ; Nulty, R.Mc (Liverpool U.) ; Meroni, C. (Milan U. ; INFN, Milan) ; Migliore, E. (INFN, Turin) ; Mitaroff, W. (Vienna, OAW) ; Mjoernmark, U. (Lund U.) ; Moa, T. (Stockholm U. ; INFN, Genoa) ; Moch, M. (Karlsruhe U.) ; Monge, R. (Genoa U. ; INFN, Genoa) ; Montenegro, J. (NIKHEF, Amsterdam) ; Moraes, D. (Rio de Janeiro Federal U. ; INFN, Genoa) ; Moreno, S. (LIP, Lisbon) ; Morettini, P. (Genoa U. ; INFN, Genoa) ; Mueller, U. (Wuppertal U.) ; Muenich, K. (Wuppertal U.) ; Mulders, M. (NIKHEF, Amsterdam) ; Mundim, L. (Rio de Janeiro State U.) ; Murray, W. (Rutherford) ; Muryn, B. (Guangdong, Inst. Mining Metallurgy) ; Myatt, G. (Oxford U.) ; Myklebust, T. (Oslo U.) ; Nassiakou, M. (Democritos Nucl. Res. Ctr.) ; Navarria, F. (INFN, Bologna) ; Nawrocki, K. (Warsaw U.) ; Nicolaidou, R. (DAPNIA, Saclay ; LIP, Lisbon) ; Oliveira, O. (DAPNIA, Saclay ; LIP, Lisbon) ; Oblakowska-Mucha, A. (Guangdong, Inst. Mining Metallurgy) ; Obraztsov, V. (Serpukhov, IHEP) ; Oliveira, O. (LIP, Lisbon) ; Oliveira, S.M. (LIP, Lisbon) ; Olshevski, A. (Dubna, JINR) ; Onofre, A. (LIP, Lisbon) ; Orava, R. (Helsinki U. ; Valencia U.) ; Osterberg, K. (Helsinki U. ; INFN, Milan Bicocca) ; Ouraou, A. (DAPNIA, Saclay) ; Oyanguren, A. (Valencia U., IFIC ; Valencia U.) ; Paganoni, M. (Milan Bicocca U. ; INFN, Milan Bicocca) ; Paiano, S. (INFN, Bologna) ; Palacios, J.P. (Liverpool U.) ; Palka, H. (Cracow, INP) ; Papadopoulou, Th.D. (Natl. Tech. U., Athens ; INFN, Genoa) ; Pape, L. (CERN) ; Parkes, C. (Glasgow U.) ; Parodi, F. (Genoa U. ; INFN, Genoa) ; Parzefall, U. (CERN) ; Passeri, A. (INFN, Rome3 ; Valencia U.) ; Passon, O. (Wuppertal U.) ; Peralta, L. (LIP, Lisbon ; INFN, Genoa) ; Perepelitsa, V. (Valencia U., IFIC ; Valencia U.) ; Perrotta, A. (INFN, Bologna) ; Petrolini, A. (Genoa U. ; INFN, Genoa) ; Piedra, J. (Cantabria Inst. of Phys.) ; Pieri, L. (INFN, Rome3) ; Pierre, F. (DAPNIA, Saclay) ; Pimenta, M. (LIP, Lisbon) ; Piotto, E. (CERN) ; Poireau, V. (CERN) ; Pol, M.E. (Rio de Janeiro, CBPF) ; Polok, G. (Cracow, INP ; INFN, Milan Bicocca) ; Pozdniakov, V. (Dubna, JINR) ; Pukhaeva, N. (Dubna, JINR) ; Pullia, A. (Milan Bicocca U. ; INFN, Milan Bicocca) ; Rames, J. (Prague, Inst. Phys.) ; Read, A. (Oslo U.) ; Rebecchi, P. (CERN) ; Rehn, J. (Karlsruhe U.) ; Reid, D. (NIKHEF, Amsterdam) ; Reinhardt, R. (Wuppertal U.) ; Renton, P. (Oxford U.) ; Richard, F. (Orsay, LAL) ; Ridky, J. (Prague, Inst. Phys.) ; Rivero, M. (Cantabria Inst. of Phys. ; INFN, Padua) ; Rodriguez, D. (Cantabria Inst. of Phys.) ; Romero, A. (INFN, Turin) ; Ronchese, P. (Padua U. ; INFN, Padua) ; Roudeau, P. (Orsay, LAL ; Dubna, JINR) ; Sadovsky, A. (Orsay, LAL ; Dubna, JINR) ; Rovelli, T. (INFN, Bologna) ; Ruhlmann-Kleider, V. (DAPNIA, Saclay ; Valencia U.) ; Ryabtchikov, D. (Serpukhov, IHEP) ; Sadovsky, A. (Dubna, JINR) ; Salmi, L. (Helsinki U.) ; Salt, J. (Valencia U., IFIC ; Valencia U.) ; Sander, C. (Karlsruhe U.) ; Santos, R. (LIP, Lisbon) ; Savoy-Navarro, A. (Paris U., VI-VII) ; Schwickerath, U. (CERN) ; Sekulin, R. (Rutherford) ; Siebel, M. (Wuppertal U. ; Lancaster U.) ; Sopczak, A. (Wuppertal U. ; Lancaster U.) ; Sisakian, A. (Dubna, JINR) ; Smadja, G. (Lyon, IPN) ; Smirnova, O. (Lund U.) ; Sokolov, A. (Serpukhov, IHEP) ; Sopczak, A. (Lancaster U.) ; Sosnowski, R. (Warsaw U.) ; Spassov, T. (CERN) ; Stanitzki, M. (Karlsruhe U.) ; Stocchi, A. (Orsay, LAL) ; Strauss, J. (Vienna, OAW ; INFN, Milan Bicocca) ; Stugu, B. (Bergen U.) ; Szczekowski, M. (Warsaw U.) ; Szeptycka, M. (Warsaw U.) ; Szumlak, T. (Guangdong, Inst. Mining Metallurgy) ; Tabarelli, T. (Milan Bicocca U. ; INFN, Milan Bicocca) ; Taffard, A.C. (Liverpool U.) ; Tegenfeldt, F. (Uppsala U.) ; Timmermans, Jan (NIKHEF, Amsterdam ; INFN, Milan Bicocca) ; Tkatchev, L. (Dubna, JINR ; Valencia U.) ; Tobin, M. (Liverpool U.) ; Todorovova, S. (Prague, Inst. Phys.) ; Tome, B. (LIP, Lisbon) ; Tonazzo, A. (Milan Bicocca U. ; INFN, Milan Bicocca) ; Tortosa, P. (Valencia U., IFIC ; Valencia U.) ; Travnicek, P. (Prague, Inst. Phys.) ; Treille, D. (CERN) ; Tristram, G. (College de France) ; Trochimczuk, M. (Warsaw U.) ; Troncon, C. (Milan U. ; INFN, Milan) ; Valenti, G. (Milan U. ; INFN, Milan) ; Turluer, M-L. (DAPNIA, Saclay) ; Tyapkin, I.A. (Dubna, JINR) ; Tyapkin, P. (Dubna, JINR) ; Tzamarias, S. (Democritos Nucl. Res. Ctr.) ; Uvarov, V. (Serpukhov, IHEP) ; Valenti, G. (INFN, Bologna) ; Van Dam, Piet (NIKHEF, Amsterdam) ; Van Eldik, J. (CERN) ; van Remortel, N. (Helsinki U.) ; Van Vulpen, I. (CERN) ; Vegni, G. (Milan U. ; INFN, Milan) ; Veloso, F. (LIP, Lisbon) ; Venus, W. (Rutherford) ; Verdier, P. (Lyon, IPN) ; Verzi, V. (INFN, Rome2) ; Vilanova, D. (DAPNIA, Saclay) ; Vitale, L. (Trieste U.) ; Vrba, V. (Prague, Inst. Phys.) ; Wahlen, H. (Wuppertal U.) ; Washbrook, A.J. (Liverpool U.) ; Weiser, C. (Karlsruhe U. ; Cracow, INP) ; Zalewska, A. (Karlsruhe U. ; Cracow, INP) ; Wicke, D. (CERN) ; Wickens, J. (Brussels U., IIHE) ; Wilkinson, G. (Oxford U.) ; Winter, M. (Strasbourg, IReS) ; Witek, M. (Cracow, INP) ; Yushchenko, O. (Serpukhov, IHEP) ; Zalewska, A. (Cracow, INP) ; Zalewski, P. (Warsaw U.) ; Zavrtanik, D. (Nova Gorica U.) ; Zhuravlov, V. (Dubna, JINR) ; Zimine, N.I. (Dubna, JINR) ; Zintchenko, A. (Dubna, JINR) |
Affiliation | (CERN) ; (Department of Physics and Astronomy, 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) ; (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, Na 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 Cedex, France) ; (School of Physics and Chemistry, University of Lancaster, Lancaster, UK) ; (LIP, FCUL, IST, CFCUC, Lisboa Codex, Portugal) ; (Department of Physics, University of Liverpool, Liverpool, UK) ; (Dept. of Physics and Astronomy, Kelvin Building, University of Glasgow, Glasgow) ; (LPNHE, IN2P3-CNRS, Univ. Paris VI et VII, Tour (RdC), place Jussieu, Paris Cedex, France) ; (Department of Physics, University of Lund, Solvegatan, Lund, Sweden) ; (Universite Claude Bernard de Lyon, IPNL, IN2P3-CNRS, Villeurbanne, 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, Holesovickach, Praha, Czech Republic) ; (NIKHEF, Postbus, DB 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, Oviedo, Spain) ; (Department of Physics, University of Oxford, Keble Road, Oxford OX RH, 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, FR- Gif-sur-Yvette, France) ; (Instituto de Fisica de Cantabria (CSIC-UC), Avda. los Castros, 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 a, Nova Gorica, Slovenia) ; (Department of Physics, University of Ljubljana, SI- Ljubljana, Slovenia) ; (Fysikum, Stockholm University, Box, 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, C.P. 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. Wissensch., Nikolsdorfergasse, Vienna, Austria) ; (Inst. Nuclear Studies and University of Warsaw, Ul. Hoza, Warsaw, Poland) ; (Now at University of Warwick, Coventry, UK) |
Publication | 2007 |
Imprint | 20 Jun 2006 |
Number of pages | 26 |
In: | Eur. Phys. J. C 50 (2007) 507-518 |
DOI | 10.1140/epjc/s10052-007-0273-z |
Subject category | Particle Physics - Experiment |
Accelerator/Facility, Experiment | CERN LEP ; DELPHI |
Abstract | A search for the pair production of fourth generation b'-quarks was performed using data taken by the DELPHI detector at LEP-II. The analysed data were collected at centre-of-mass energies ranging from 196 to 209 GeV, corresponding to an integrated luminosity of 420 pb^{-1}. No evidence for a signal was found. Upper limits on BR(b' -> bZ) and BR(b' -> cW) were obtained for b' masses ranging from 96 to 103 GeV/c^2. These limits, together with the theoretical branching ratios predicted by a sequential four generations model, were used to constrain the value of R_{CKM}=|V_{cb'}/V_{tb'}V_{tb}|, where V_{cb'}, V_{tb'} and V_{tb} are elements of the extended CKM matrix. |