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b-tagging in DELPHI at LEP

By P. Abreu, W. Adam, T. Adye, P. Adzic, T. Albrecht, T. Alderweireld, R. Alemany-Fernandez, T. Allmendinger, P.P. Allport, S. Almehed, U. Amaldi, N. Amapane, S. Amato, E. Anashkin, A. Andreazza, S. Andringa, N. Anjos, P. Antilogus, W-D. Apel, Y. Arnoud, S. Ask, B. Asman, J.-E. Augustin, A. Augustinus, P. Baillon, A. Ballestrero, P. Bambade, R. Barbier, D. Bardin, G. Barker, A. Baroncelli, M. Bates, M. Battaglia, M. Baubillier, K-H. Becks, M. Begalli, A. Behrmann, N. Benekos, A. Benvenuti, C. Berat, M. Berggren, L. Berntzon, D. Bertrand, M. Besancon, N. Besson, J. Bibby, P. Biffi, D. Bloch, M. Blom, M. Bonesini, M. Boonekamp, P.S.L. Booth, G. Borisov, O. Botner, B. Bouquet, T.J.V. Bowcock, I. Boyko, M. Bracko, P. Branchini, R. Brenner, P. Bruckman, J.M. Brunet, L. Bugge, P. Buschmann, M. Caccia, M. Calvi, T. Camporesi, V. Canale, F. Carena, N. Castro, F. Cavallo, V. Chabaud, M. Chapkin, Ph. Charpentier, P. Checchia, R. Chierici, P. Chliapnikov, J. Chudoba, S.U. Chung, K. Cieslik, P. Collins, R. Contri, G. Cosme, F. Cossutti, M.J. Costa, F. Couchot, B. Crawley, D. Crennell, J. Cuevas, B. D'Almagne, J. D'Hondt, J. Dalmau, T. Da Silva, W. Da Silwa, G. Della Ricca, A. De Angelis, W. De Boer, C. De Clercq, B. De Lotto, N. De Maria, A. De Min, L. De Paula, L. Di Ciaccio, H. Dijkstra, A. Di Simone, K. Doroba, J. Drees, M. Dris, G. Eigen, T. Ekelof, M. Ellert, M. Elsing, M.C. Espirito Santo, G. Fanourakis, D. Fassouliotis, M. Feindt, J. Fernandez, A. Ferrer, F. Ferro, U. Flagmeyer, H. Foeth, E. Fokitis, F. Fulda-Quenzer, J. Fuster, M. Gandelman, C. Garcia, Ph. Gavillet, E. Gazis, T. Geralis, R. Gokieli, B. Golob, J.J. Gomez Cadenas, G. Gomez-Ceballos, P. Goncalves, E. Graziani, G. Grosdidier, K. Grzelak, J. Guy, C. Haag, A. Hallgren, K. Hamacher, K. Hamilton, J. Hansen, S. Haug, F. Hauler, V. Hedberg, M. Hennecke, J.A. Hernando, H. Herr, J. Heuser, S-O. Holmgren, P.J. Holt, M.A. Houlden, K. Hultqvist, J.N. Jackson, P. Jalocha, Ch. Jarlskog, G. Jarlskog, P. Jarry, D. Jeans, E.K. Johansson, P.D. Johansson, P. Jonsson, C. Joram, L. Jungermann, F. Kapusta, M. Karlsson, S. Katsanevas, E. Katsoufis, R. Keranen, G. Kernel, B.P. Kersevan, A. Kiiskinen, B.T. King, N.J. Kjaer, P. Kluit, P. Kokkinias, C. Koukoumelis, O. Kouznetsov, Z. Krumstein, M. Kucharczyk, W. Kucewicz, J. Kurowska, J. Lamsa, G. Leder, F. Ledroit, L. Leinonen, R. Leitner, J. Lemonne, V. Lepeltier, T. Lesiak, W. Liebig, D. Liko, A. Lipniacka, J.H. Lopes, J.M. Lopez, D. Loukas, P. Lutz, L. Lyons, J. MacNaughton, A. Malek, S. Maltezos, F. Mandl, J. Marco, R. Marco, B. Marechal, M. Margoni, J-C. Marin, C. Mariotti, A. Markou, C. Martinez-Rivero, F. Martinez-Vidal, J. Masik, N. Mastroyiannopoulos, F. Matorras, C. Matteuzzi, F. Mazzucato, M. Mazzucato, R. McNulty, C. Meroni, W.T. Meyer, E. Migliore, W. Mitaroff, U. Mjoernmark, T. Moa, M. Moch, K. Moenig, R. Monge, J. Montenegro, D. Moraes, S. Moreno, P. Morettini, U. Mueller, K. Muenich, M. Mulders, L. Mundim, W. Murray, B. Muryn, G. Myatt, T. Myklebust, M. Nassiakou, F. Navarria, K. Nawrocki, R. Nicolaidou, P. Niezurawski, M. Nikolenko, A. Nomerotski, A. Norman, A. Nygren, A. Oblakowska-Mucha, V. Obraztsov, A. Olshevski, A. Onofre, R. Orava, K. Osterberg, A. Ouraou, A. Oyanguren, M. Paganoni, S. Paiano, J.P. Palacios, H. Palka, Th.D. Papadopoulou, L. Pape, C. Parkes, F. Parodi, U. Parzefall, A. Passeri, O. Passon, L. Peralta, V. Perepelitsa, A. Perrotta, A. Petrolini, J. Piedra, L. Pieri, F. Pierre, M. Pimenta, E. Piotto, T. Podobnik, V. Poireau, M.E. Pol, G. Polok, P. Poropat, V. Pozdniakov, N. Pukhaeva, A. Pullia, J. Rames, L. Ramler, A. Read, P. Rebecchi, J. Rehn, D. Reid, R. Reinhardt, P. Renton, F. Richard, J. Ridky, M. Rivero, D. Rodriguez, A. Romero, P. Ronchese, E. Rosenberg, P. Roudeau, T. Rovelli, V. Ruhlmann-Kleider, D. Ryabtchikov, A. Sadovsky, L. Salmi, J. Salt, A. Savoy-Navarro, U. Scchwickerath, A. Segar, R. Sekulin, M. Siebel, A. Sisakian, G. Smadja, O. Smirnova, A. Sokilov, A. Sopczak, R. Sosnowski, T. Spassov, M. Stanitzki, I. Stavitski, A. Stocchi, J. Strauss, B. Stugu, M. Szczekowski, M. Szeptycka, T. Szumlak, T. Tabarelli, A.C. Taffard, F. Tegenfeldt, J. Timmermans, N. Tinti, L. Tkatchev, M. Tobin, S. Todorovova, A. Tomaradze, B. Tome, A. Tonazzo, Pablo Tortosa, P. Travnicek, D. Treille, W. Trischuk, G. Tristram, M. Trochimczuk, C. Troncon, M-L. Turluer, I.A. Tyapkin, P. Tyapkin, M. Tyndel, S. Tzamarias, V. Uvarov, G. Valenti, P. Van Dam, J. Van Eldik, A. Van Lysebetten, N. Van Remortel, I. Van Vulpen, G. Vegni, F. Veloso, W. Venus, F. Verbeure, P. Verdier, V. Verzi, D. Vilanova, L. Vitale, V. Vrba, H. Wahlen, A.J. Washbrook, P. Weilhammer, C. Weiser, D. Wicke, J. Wickens, G. Wilkinson, M. Winter, M. Witek, O. Yuschchenko, A. Zalewska, P. Zalewski, D. Zavrtanik, N.I. Zimin, A. Zintchenko and M. Zupan

Abstract

DELPHIThe standard method used for tagging b-hadrons in the DELPHI experiment at the CERN LEP Collider is discussed in detail. The main ingredient of b-tagging is the impact parameters of tracks, which relies mostly on the vertex detector. Additional information, such as the mass of particles associated to a secondary vertex, significantly improves the selection efficiency and the background suppression. The paper describes various discriminating variables used for the tagging and the procedure of their combination. In addition, applications of b-tagging to some physics analyses, which depend crucially on the performance and reliability of b-tagging, are described briefly

Topics: [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex]
Publisher: Springer Verlag (Germany)
Year: 2004
OAI identifier: oai:HAL:in2p3-00020173v1
Provided by: Hal-Diderot
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