Search for a fourth generation b’-quark at LEP-II at $\sqrt{s}=\,$ 196–209 GeV

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.; Berntzon, L.; 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, N.; 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.; Dalmau, 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, E.K.; Johansson, P.D.; 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.; Moenig, K.; 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.; Oliveira, O.; Oliveira, S.M.; 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.; Santos, R.; 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.; Taffard, A.C.; Tegenfeldt, F.; Timmermans, J.; 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.; Zimin, N.I.; Zintchenko, A.; Zupan, M.

doi:10.1140/epjc/s10052-007-0273-z

Search for a fourth generation b’-quark at LEP-II at $\sqrt{s}=\,$196–209 GeV

Regular Article - Experimental Physics
Published: 29 March 2007

Volume 50, pages 507–518, (2007)
Cite this article

The European Physical Journal C Aims and scope Submit manuscript

J. Abdallah²⁶,
P. Abreu²³,
W. Adam⁵⁵,
P. Adzic¹²,
T. Albrecht¹⁸,
R. Alemany-Fernandez⁹,
T. Allmendinger¹⁸,
P.P. Allport²⁴,
U. Amaldi³⁰,
N. Amapane⁴⁸,
S. Amato⁵²,
E. Anashkin³⁷,
A. Andreazza²⁹,
S. Andringa²³,
N. Anjos²³,
P. Antilogus²⁶,
W.-D. Apel¹⁸,
Y. Arnoud¹⁵,
S. Ask²⁷,
B. Asman⁴⁷,
J.E. Augustin²⁶,
A. Augustinus⁹,
P. Baillon⁹,
A. Ballestrero⁴⁹,
P. Bambade²¹,
R. Barbier²⁸,
D. Bardin¹⁷,
G.J. Barker⁵⁷,
A. Baroncelli⁴⁰,
M. Battaglia⁹,
M. Baubillier²⁶,
K-H. Becks⁵⁸,
M. Begalli⁷,
A. Behrmann⁵⁸,
E. Ben-Haim²¹,
N. Benekos³³,
A. Benvenuti⁵,
C. Berat¹⁵,
M. Berggren²⁶,
L. Berntzon⁴⁷,
D. Bertrand²,
M. Besancon⁴¹,
N. Besson⁴¹,
D. Bloch¹⁰,
M. Blom³²,
M. Bluj⁵⁶,
M. Bonesini³⁰,
M. Boonekamp⁴¹,
P.S.L. Booth²⁴,
G. Borisov²²,
O. Botner⁵³,
B. Bouquet²¹,
T.J.V. Bowcock²⁴,
I. Boyko¹⁷,
M. Bracko⁴⁴,
R. Brenner⁵³,
E. Brodet³⁶,
P. Bruckman¹⁹,
J.M. Brunet⁸,
B. Buschbeck⁵⁵,
P. Buschmann⁵⁸,
M. Calvi³⁰,
T. Camporesi⁹,
V. Canale³⁹,
F. Carena⁹,
N. Castro²³,
F. Cavallo⁵,
M. Chapkin⁴³,
Ph. Charpentier⁹,
P. Checchia³⁷,
R. Chierici⁹,
P. Chliapnikov⁴³,
J. Chudoba⁹,
S.U. Chung⁹,
K. Cieslik¹⁹,
P. Collins⁹,
R. Contri¹⁴,
G. Cosme²¹,
F. Cossutti⁵⁰,
M.J. Costa⁵⁴,
D. Crennell³⁸,
J. Cuevas³⁵,
J. D’Hondt²,
J. Dalmau⁴⁷,
T. Da Silva⁵²,
W. Da Silva²⁶,
G. Della Ricca⁵⁰,
A. De Angelis⁵¹,
W. De Boer¹⁸,
C. De Clercq²,
B. De Lotto⁵¹,
N. De Maria⁴⁸,
A. De Min³⁷,
L. de Paula⁵²,
L. Di Ciaccio³⁹,
A. Di Simone⁴⁰,
K. Doroba⁵⁶,
J. Drees^58,9,
G. Eigen⁴,
T. Ekelof⁵³,
M. Ellert⁵³,
M. Elsing⁹,
M.C. Espirito Santo²³,
G. Fanourakis¹²,
D. Fassouliotis^12,3,
M. Feindt¹⁸,
J. Fernandez⁴²,
A. Ferrer⁵⁴,
F. Ferro¹⁴,
U. Flagmeyer⁵⁸,
H. Foeth⁹,
E. Fokitis³³,
F. Fulda-Quenzer²¹,
J. Fuster⁵⁴,
M. Gandelman⁵²,
C. Garcia⁵⁴,
Ph. Gavillet⁹,
E. Gazis³³,
R. Gokieli^9,56,
B. Golob^44,46,
G. Gomez-Ceballos⁴²,
P. Goncalves²³,
E. Graziani⁴⁰,
G. Grosdidier²¹,
K. Grzelak⁵⁶,
J. Guy³⁸,
C. Haag¹⁸,
A. Hallgren⁵³,
K. Hamacher⁵⁸,
K. Hamilton³⁶,
S. Haug³⁴,
F. Hauler¹⁸,
V. Hedberg²⁷,
M. Hennecke¹⁸,
H. Herr⁹,
J. Hoffman⁵⁶,
S-O. Holmgren⁴⁷,
P.J. Holt⁹,
M.A. Houlden²⁴,
J.N. Jackson²⁴,
G. Jarlskog²⁷,
P. Jarry⁴¹,
D. Jeans³⁶,
E.K. Johansson⁴⁷,
P.D. Johansson⁴⁷,
P. Jonsson²⁸,
C. Joram⁹,
L. Jungermann¹⁸,
F. Kapusta²⁶,
S. Katsanevas²⁸,
E. Katsoufis³³,
G. Kernel⁴⁴,
B.P. Kersevan^44,46,
U. Kerzel¹⁸,
B.T. King²⁴,
N.J. Kjaer⁹,
P. Kluit³²,
P. Kokkinias¹²,
C. Kourkoumelis³,
O. Kouznetsov¹⁷,
Z. Krumstein¹⁷,
M. Kucharczyk¹⁹,
J. Lamsa¹,
G. Leder⁵⁵,
F. Ledroit¹⁵,
L. Leinonen⁴⁷,
R. Leitner³¹,
J. Lemonne²,
V. Lepeltier²¹,
T. Lesiak¹⁹,
W. Liebig⁵⁸,
D. Liko⁵⁵,
A. Lipniacka⁴⁷,
J.H. Lopes⁵²,
J.M. Lopez³⁵,
D. Loukas¹²,
P. Lutz⁴¹,
L. Lyons³⁶,
J. MacNaughton⁵⁵,
A. Malek⁵⁸,
S. Maltezos³³,
F. Mandl⁵⁵,
J. Marco⁴²,
R. Marco⁴²,
B. Marechal⁵²,
M. Margoni³⁷,
J-C. Marin⁹,
C. Mariotti⁹,
A. Markou¹²,
C. Martinez-Rivero⁴²,
J. Masik¹³,
N. Mastroyiannopoulos¹²,
F. Matorras⁴²,
C. Matteuzzi³⁰,
F. Mazzucato³⁷,
M. Mazzucato³⁷,
R. Mc Nulty²⁴,
C. Meroni²⁹,
E. Migliore⁴⁸,
W. Mitaroff⁵⁵,
U. Mjoernmark²⁷,
T. Moa⁴⁷,
M. Moch¹⁸,
K. Moenig^9,11,
R. Monge¹⁴,
J. Montenegro³²,
D. Moraes⁵²,
S. Moreno²³,
P. Morettini¹⁴,
U. Mueller⁵⁸,
K. Muenich⁵⁸,
M. Mulders³²,
L. Mundim⁷,
W. Murray³⁸,
B. Muryn²⁰,
G. Myatt³⁶,
T. Myklebust³⁴,
M. Nassiakou¹²,
F. Navarria⁵,
K. Nawrocki⁵⁶,
R. Nicolaidou⁴¹,
M. Nikolenko^17,10,
A. Oblakowska-Mucha²⁰,
V. Obraztsov⁴³,
O. Oliveira²³,
S.M. Oliveira²³,
A. Olshevski¹⁷,
A. Onofre²³,
R. Orava¹⁶,
K. Osterberg¹⁶,
A. Ouraou⁴¹,
A. Oyanguren⁵⁴,
M. Paganoni³⁰,
S. Paiano⁵,
J.P. Palacios²⁴,
H. Palka¹⁹,
Th.D. Papadopoulou³³,
L. Pape⁹,
C. Parkes²⁵,
F. Parodi¹⁴,
U. Parzefall⁹,
A. Passeri⁴⁰,
O. Passon⁵⁸,
L. Peralta²³,
V. Perepelitsa⁵⁴,
A. Perrotta⁵,
A. Petrolini¹⁴,
J. Piedra⁴²,
L. Pieri⁴⁰,
F. Pierre⁴¹,
M. Pimenta²³,
E. Piotto⁹,
T. Podobnik^44,46,
V. Poireau⁹,
M.E. Pol⁶,
G. Polok¹⁹,
V. Pozdniakov¹⁷,
N. Pukhaeva¹⁷,
A. Pullia³⁰,
J. Rames¹³,
A. Read³⁴,
P. Rebecchi⁹,
J. Rehn¹⁸,
D. Reid³²,
R. Reinhardt⁵⁸,
P. Renton³⁶,
F. Richard²¹,
J. Ridky¹³,
M. Rivero⁴²,
D. Rodriguez⁴²,
A. Romero⁴⁸,
P. Ronchese³⁷,
P. Roudeau²¹,
T. Rovelli⁵,
V. Ruhlmann-Kleider⁴¹,
D. Ryabtchikov⁴³,
A. Sadovsky¹⁷,
L. Salmi¹⁶,
J. Salt⁵⁴,
C. Sander¹⁸,
R. Santos²³,
A. Savoy-Navarro²⁶,
U. Schwickerath⁹,
R. Sekulin³⁸,
M. Siebel⁵⁸,
A. Sisakian¹⁷,
G. Smadja²⁸,
O. Smirnova²⁷,
A. Sokolov⁴³,
A. Sopczak²²,
R. Sosnowski⁵⁶,
T. Spassov⁹,
M. Stanitzki¹⁸,
A. Stocchi²¹,
J. Strauss⁵⁵,
B. Stugu⁴,
M. Szczekowski⁵⁶,
M. Szeptycka⁵⁶,
T. Szumlak²⁰,
T. Tabarelli³⁰,
A.C. Taffard²⁴,
F. Tegenfeldt⁵³,
J. Timmermans³²,
L. Tkatchev¹⁷,
M. Tobin²⁴,
S. Todorovova¹³,
B. Tome²³,
A. Tonazzo³⁰,
P. Tortosa⁵⁴,
P. Travnicek¹³,
D. Treille⁹,
G. Tristram⁸,
M. Trochimczuk⁵⁶,
C. Troncon²⁹,
M-L. Turluer⁴¹,
I.A. Tyapkin¹⁷,
P. Tyapkin¹⁷,
S. Tzamarias¹²,
V. Uvarov⁴³,
G. Valenti⁵,
P. Van Dam³²,
J. Van Eldik⁹,
N. Van Remortel¹⁶,
I. Van Vulpen⁹,
G. Vegni²⁹,
F. Veloso²³,
W. Venus³⁸,
P. Verdier²⁸,
V. Verzi³⁹,
D. Vilanova⁴¹,
L. Vitale⁵⁰,
V. Vrba¹³,
H. Wahlen⁵⁸,
A.J. Washbrook²⁴,
C. Weiser¹⁸,
D. Wicke⁹,
J. Wickens²,
G. Wilkinson³⁶,
M. Winter¹⁰,
M. Witek¹⁹,
O. Yushchenko⁴³,
A. Zalewska¹⁹,
P. Zalewski⁵⁶,
D. Zavrtanik⁴⁵,
V. Zhuravlov¹⁷,
N.I. Zimin¹⁷,
A. Zintchenko¹⁷,
M. Zupan¹² &
The DELPHI Collaboration

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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 $R_{\text{CKM}}=|\frac{V_{cb\prime}}{V_{\text{tb}\prime}V_{tb}}|$, where V_cb′, V_tb′ and V_tb are elements of the extended CKM matrix.

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Authors and Affiliations

Department of Physics and Astronomy, Iowa State University, Ames, AI, 50011-3160, USA
J. Lamsa
IIHE, ULB-VUB, Pleinlaan 2, 1050, Brussels, Belgium
D. Bertrand, J. D’Hondt, C. De Clercq, J. Lemonne & J. Wickens
Physics Laboratory, University of Athens, Solonos Str. 104, 10680, Athens, Greece
D. Fassouliotis & C. Kourkoumelis
Department of Physics, University of Bergen, Allégaten 55, 5007, Bergen, Norway
G. Eigen & B. Stugu
Dipartimento di Fisica, Università di Bologna and INFN, Via Irnerio 46, 40126, Bologna, Italy
A. Benvenuti, F. Cavallo, F. Navarria, S. Paiano, A. Perrotta, T. Rovelli & G. Valenti
Centro Brasileiro de Pesquisas Físicas, rua Xavier Sigaud 150, 22290, Rio de Janeiro, Brazil
M.E. Pol
Inst. de Física, Univ. Estadual do Rio de Janeiro, rua São Francisco Xavier 524, Rio de Janeiro, Brazil
M. Begalli & L. Mundim
Lab. de Physique Corpusculaire, IN2P3-CNRS, Collège de France, 75231, Paris Cedex 05, France
J.M. Brunet & G. Tristram
CERN, 1211, Geneva 23, Switzerland
R. Alemany-Fernandez, A. Augustinus, P. Baillon, M. Battaglia, T. Camporesi, F. Carena, Ph. Charpentier, R. Chierici, J. Chudoba, S.U. Chung, P. Collins, J. Drees, M. Elsing, H. Foeth, Ph. Gavillet, R. Gokieli, H. Herr, P.J. Holt, C. Joram, N.J. Kjaer, J-C. Marin, C. Mariotti, K. Moenig, L. Pape, U. Parzefall, E. Piotto, V. Poireau, P. Rebecchi, U. Schwickerath, T. Spassov, D. Treille, J. Van Eldik, I. Van Vulpen & D. Wicke
Institut de Recherches Subatomiques, IN2P3 - CNRS/ULP - BP20, 67037, Strasbourg Cedex, France
D. Bloch, M. Nikolenko & M. Winter
DESY-Zeuthen, Platanenallee 6, 15735, Zeuthen, Germany
K. Moenig
Institute of Nuclear Physics, N.C.S.R. Demokritos, P.O. Box 60228, 15310, Athens, Greece
P. Adzic, G. Fanourakis, D. Fassouliotis, P. Kokkinias, D. Loukas, A. Markou, N. Mastroyiannopoulos, M. Nassiakou, S. Tzamarias & M. Zupan
Inst. of Phys. of the C.A.S. High Energy Physics Division, FZU, Na Slovance 2, 18040, Praha 8, Czech Republic
J. Masik, J. Rames, J. Ridky, S. Todorovova, P. Travnicek & V. Vrba
Dipartimento di Fisica, Università di Genova and INFN, Via Dodecaneso 33, 16146, Genova, Italy
R. Contri, F. Ferro, R. Monge, P. Morettini, F. Parodi & A. Petrolini
Institut des Sciences Nucléaires, IN2P3-CNRS, Université de Grenoble 1, 38026, Grenoble Cedex, France
Y. Arnoud, C. Berat & F. Ledroit
Helsinki Institute of Physics and Department of Physical Sciences, University of Helsinki, P.O. Box 64, 00014, Helsinki, Finland
R. Orava, K. Osterberg, L. Salmi & N. Van Remortel
Head Post Office, Joint Institute for Nuclear Research, Dubna, P.O. Box 79, 101000, Moscow, Russia
D. Bardin, I. Boyko, O. Kouznetsov, Z. Krumstein, M. Nikolenko, A. Olshevski, V. Pozdniakov, N. Pukhaeva, A. Sadovsky, A. Sisakian, L. Tkatchev, I.A. Tyapkin, P. Tyapkin, V. Zhuravlov, N.I. Zimin & A. Zintchenko
Institut für Experimentelle Kernphysik, Universität Karlsruhe, Postfach 6980, 76128, Karlsruhe, Germany
T. Albrecht, T. Allmendinger, W.-D. Apel, W. De Boer, M. Feindt, C. Haag, F. Hauler, M. Hennecke, L. Jungermann, U. Kerzel, M. Moch, J. Rehn, C. Sander, M. Stanitzki & C. Weiser
Institute of Nuclear Physics PAN, Ul. Radzikowskiego 152, 31142, Krakow, Poland
P. Bruckman, K. Cieslik, M. Kucharczyk, T. Lesiak, H. Palka, G. Polok, M. Witek & A. Zalewska
Faculty of Physics and Nuclear Techniques, University of Mining and Metallurgy, 30055, Krakow, Poland
B. Muryn, A. Oblakowska-Mucha & T. Szumlak
Lab. de l’Accélérateur Linéaire, IN2P3-CNRS, Université de Paris-Sud, , Bât. 200, 91405, Orsay Cedex, France
P. Bambade, E. Ben-Haim, B. Bouquet, G. Cosme, F. Fulda-Quenzer, G. Grosdidier, V. Lepeltier, F. Richard, P. Roudeau & A. Stocchi
School of Physics and Chemistry, University of Lancaster, Lancaster, LA1 4YB, UK
G. Borisov & A. Sopczak
LIP, FCUL, IST, CFCUC, Av. Elias Garcia 14-1o, 1000, Lisboa Codex, Portugal
P. Abreu, S. Andringa, N. Anjos, N. Castro, M.C. Espirito Santo, P. Goncalves, S. Moreno, O. Oliveira, S.M. Oliveira, A. Onofre, L. Peralta, M. Pimenta, R. Santos, B. Tome & F. Veloso
Department of Physics, University of Liverpool, P.O. Box 147, Liverpool, L69 3BX, UK
P.P. Allport, P.S.L. Booth, T.J.V. Bowcock, M.A. Houlden, J.N. Jackson, B.T. King, R. Mc Nulty, J.P. Palacios, A.C. Taffard, M. Tobin & A.J. Washbrook
Dept. of Physics and Astronomy, Kelvin Building, University of Glasgow, Glasgow, G12 8QQ, UK
C. Parkes
LPNHE, IN2P3-CNRS, Univ. Paris VI et VII, Tour 33 (RdC), 4 place Jussieu, 75252, Paris Cedex 05, France
J. Abdallah, P. Antilogus, J.E. Augustin, M. Baubillier, M. Berggren, W. Da Silva, F. Kapusta & A. Savoy-Navarro
Department of Physics, University of Lund, Sölvegatan 14, 22363, Lund, Sweden
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IPNL, IN2P3-CNRS, Université Claude Bernard de Lyon, 69622, Villeurbanne Cedex, France
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Dipartimento di Fisica, Università di Milano and INFN-MILANO, Via Celoria 16, 20133, Milan, Italy
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Dipartimento di Fisica, Univ. di Milano-Bicocca and INFN-MILANO, Piazza della Scienza 3, 20126, Milan, Italy
U. Amaldi, M. Bonesini, M. Calvi, C. Matteuzzi, M. Paganoni, A. Pullia, T. Tabarelli & A. Tonazzo
IPNP of MFF, Charles Univ., Areal MFF, V Holesovickach 2, 18000, Praha 8, Czech Republic
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NIKHEF, Postbus 41882, 1009 DB, Amsterdam, The Netherlands
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Physics Department, National Technical University, Zografou Campus, 15773, Athens, Greece
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Physics Department, University of Oslo, Oslo, 0316, Norway
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Dpto. Fisica, Univ. Oviedo, Avda. Calvo Sotelo s/n, 33007, Oviedo, Spain
J. Cuevas & J.M. Lopez
Department of Physics, University of Oxford, Keble Road, Oxford, OX1 3RH, UK
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Dipartimento di Fisica, Università di Padova and INFN, Via Marzolo 8, 35131, Padua, Italy
E. Anashkin, P. Checchia, A. De Min, M. Margoni, F. Mazzucato, M. Mazzucato & P. Ronchese
Rutherford Appleton Laboratory, Chilton, Didcot, OX11 OQX, UK
D. Crennell, J. Guy, W. Murray, R. Sekulin & W. Venus
Dipartimento di Fisica, Università di Roma II and INFN, Tor Vergata, 00173, Rome, Italy
V. Canale, L. Di Ciaccio & V. Verzi
Dipartimento di Fisica, Università di Roma III and INFN, Via della Vasca Navale 84, 00146, Rome, Italy
A. Baroncelli, A. Di Simone, E. Graziani, A. Passeri & L. Pieri
DAPNIA/Service de Physique des Particules, CEA-Saclay, 91191, Gif-sur-Yvette Cedex, France
M. Besancon, N. Besson, M. Boonekamp, P. Jarry, P. Lutz, R. Nicolaidou, A. Ouraou, F. Pierre, V. Ruhlmann-Kleider, M-L. Turluer & D. Vilanova
Instituto de Fisica de Cantabria (CSIC-UC), Avda. los Castros s/n, 39006, Santander, Spain
J. Fernandez, G. Gomez-Ceballos, J. Marco, R. Marco, C. Martinez-Rivero, F. Matorras, J. Piedra, M. Rivero & D. Rodriguez
Inst. for High Energy Physics, Serpukov, P.O. Box 35, Protvino, Moscow Region, Russia
M. Chapkin, P. Chliapnikov, V. Obraztsov, D. Ryabtchikov, A. Sokolov, V. Uvarov & O. Yushchenko
J. Stefan Institute, Jamova 39, 1000, Ljubljana, Slovenia
M. Bracko, B. Golob, G. Kernel, B.P. Kersevan & T. Podobnik
Laboratory for Astroparticle Physics, University of Nova Gorica, Kostanjeviska 16a, 5000, Nova Gorica, Slovenia
D. Zavrtanik
Department of Physics, University of Ljubljana, 1000, Ljubljana, Slovenia
B. Golob, B.P. Kersevan & T. Podobnik
Fysikum, Stockholm University, Box 6730, 11385, Stockholm, Sweden
B. Asman, L. Berntzon, J. Dalmau, S-O. Holmgren, E.K. Johansson, P.D. Johansson, L. Leinonen, A. Lipniacka & T. Moa
Dipartimento di Fisica Sperimentale, Università di Torino and INFN, Via P. Giuria 1, 10125, Turin, Italy
N. Amapane, N. De Maria, E. Migliore & A. Romero
INFN, Sezione di Torino and Dipartimento di Fisica Teorica, Università di Torino, Via Giuria 1, 10125, Turin, Italy
A. Ballestrero
Dipartimento di Fisica, Università di Trieste and INFN, Via A. Valerio 2, 34127, Trieste, Italy
F. Cossutti, G. Della Ricca & L. Vitale
Istituto di Fisica, Università di Udine and INFN, 33100, Udine, Italy
A. De Angelis & B. De Lotto
C.P. 68528 Cidade Univ., Ilha do Fundão, Univ. Federal do Rio de Janeiro, 21945-970, Rio de Janeiro, Brazil
S. Amato, T. Da Silva, L. de Paula, M. Gandelman, J.H. Lopes, B. Marechal & D. Moraes
Department of Radiation Sciences, University of Uppsala, P.O. Box 535, 75121, Uppsala, Sweden
O. Botner, R. Brenner, T. Ekelof, M. Ellert, A. Hallgren & F. Tegenfeldt
IFIC, Valencia-CSIC, and D.F.A.M.N., U. de Valencia, Avda. Dr. Moliner 50, 46100, Burjassot, Valencia, Spain
M.J. Costa, A. Ferrer, J. Fuster, C. Garcia, A. Oyanguren, V. Perepelitsa, J. Salt & P. Tortosa
Institut für Hochenergiephysik, Österr. Akad. d. Wissensch., Nikolsdorfergasse 18, 1050, Vienna, Austria
W. Adam, B. Buschbeck, G. Leder, D. Liko, J. MacNaughton, F. Mandl, W. Mitaroff & J. Strauss
Inst. Nuclear Studies and University of Warsaw, Ul. Hoza 69, 00681, Warsaw, Poland
M. Bluj, K. Doroba, R. Gokieli, K. Grzelak, J. Hoffman, K. Nawrocki, R. Sosnowski, M. Szczekowski, M. Szeptycka, M. Trochimczuk & P. Zalewski
University of Warwick, Coventry, CV4 7AL, UK
G.J. Barker
Fachbereich Physik, University of Wuppertal, Postfach 100127, 42097, Wuppertal, Germany
K-H. Becks, A. Behrmann, P. Buschmann, J. Drees, U. Flagmeyer, K. Hamacher, W. Liebig, A. Malek, U. Mueller, K. Muenich, O. Passon, R. Reinhardt, M. Siebel & H. Wahlen

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Abdallah, J., Abreu, P., Adam, W. et al. Search for a fourth generation b’-quark at LEP-II at $\sqrt{s}=\,$196–209 GeV. Eur. Phys. J. C 50, 507–518 (2007). https://doi.org/10.1140/epjc/s10052-007-0273-z

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Received: 26 July 2006
Revised: 28 January 2007
Published: 29 March 2007
Issue Date: April 2007
DOI: https://doi.org/10.1140/epjc/s10052-007-0273-z

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Search for a fourth generation b’-quark at LEP-II at \(\sqrt{s}=\,\)196–209 GeV

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Search for the production of an excited bottom quark decaying to tW in proton-proton collisions at $$ \sqrt{s}=8 $$ TeV

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Search for a fourth generation b’-quark at LEP-II at \(\sqrt{s}=\,\)196–209 GeV

Abstract

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Search for the production of an excited bottom quark decaying to tW in proton-proton collisions at $$ \sqrt{s}=8 $$ TeV

Exotic decays of heavy B quarks

Search for massive long-lived particles decaying semileptonically at $${\sqrt{s}}=13\,\hbox {TeV}$$

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