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1. Comparative study of (111) and (100) crystals and capacitance measurements on Si strip detectors in CMS

Author

Manfred Krammer, D. Boemi, U. Biggeri, Paolo Lariccia, T. Tuuva, Marco Meschini, Stephen Watts, Luigi Fiore, G. Viertel, D. Pandoulas, F. Raffaelli, Donato Creanza, Paolo Ciampolini, Giovanna Selvaggi, Alessandro Giassi, Guido Tonelli, Josef Hrubec, Anna Elliott-Peisert, Bruno Wittmer, K. Luebelsmeyer, Marco Pieri, P. Mättig, Salvatore My, A. Fürtjes, Ettore Focardi, A. Buffini, Lutz Feld, M. Lenzi, Piero Giorgio Verdini, Rino Castaldi, A. Caner, M. Giorgi, G. Stefanini, G. Hall, Giancarlo Mantovani, Lucia Silvestris, Suchandra Dutta, A. Giraldo, Sebastiano Albergo, B. Checcucci, S. Braibant, Veikko Karimäki, K. Freudenreich, C. Vannini, Horst Breuker, Werner Lustermann, E. Catacchini, B. Glessing, M. Loreti, Ernesto Migliore, V. Radicci, R. Della Marina, Marcello Mannelli, A. Starodumov, Mika Huhtinen, Z. Xie, R. Hammerstrom, A. Bader, Laura Borrello, P. Tempesta, A. Marchioro, A. Kaminsky, Filippo Bosi, S. Busoni, Dario Bisello, B. Mc Evoy, Raffaello D'Alessandro, G. M. Bilei, Renato Potenza, Andrea Castro, Michel Raymond, M. Da Rold, Carlo Civinini, B. Schmitt, Mara Bruzzi, Alessandro Paccagnella, Nicola Bacchetta, R. Siedling, I. Stavitski, Giuseppe Bagliesi, Patrizia Azzi, Thomas Hebbeker, A. Santocchia, W.H. Gu, L. Servoli, C. Eklund, G. Martignon, Alberto Messineo, Fabrizio Palla, G. Parrini, M.J. French, St. Koenig, Daniele Passeri, K. Skog, Roberto Dell'Orso, Andrea Candelori, S. Piperov, Alessia Tricomi, Giacomo Sguazzoni, M. Angarano, A. Basti, Natale Demaria, Li Yahong, Chiara Mariotti, C. Bozzi, E. Babucci, Giorgio Maggi, M. De Palma, and A. Papi

Subjects
Physics, Semiconductor, Backplane, business.industry, Detector, Optoelectronics, Substrate (electronics), Radiation, business, Capacitance, Silicon microstrip detectors
Abstract

For the construction of the silicon microstrip detectors for the Tracker of the CMS experiment, two different substrate choices were investigated: A high-resistivity (6 k cm) substrate with (111) crystalorientation and a low-resistivity (2k cm) one with (100) crystalorientation. The interstrip and backplane capacitances were measured before and after the exposure to radiation in a range of strip pitches from 60 μm to 240 μm and for values of the width-over-pitch ratio between 0.1 and 0.5.

Published
1999

2. Mean lifetime of theB s 0 meson

Author

W.S.C. Williams, Lucio Cerrito, V. Chorowicz, M. Verlato, G. D. Alekseev, B. Loerstad, G. Valenti, P. Niss, A. Galloni, G. Borisov, A. N. Sisakian, A. Sadovsky, Mario Sannino, M. Mazzucato, W. Krupinski, R. Sosnowski, P. H. Kramer, Pierre Billoir, F. Pierre, Vincent Hedberg, A. Ferrer, D. W. Lane, L. S. Vertogradov, M. Mc Cubbin, K. Hultqvist, Rafael Marco, M. Baubillier, Tiziano Camporesi, H. Palka, J. W. Lamsa, Robert S. Brown, H. J. Hilke, Lydia Roos, Borge Svane Nielsen, R. Moeller, A. G. Frodesen, M. Blume, W. Oberschulte-Beckmann, G. Ekspong, Manfred Krammer, P. J. Holt, N. G. Redaelli, F. Barao, S. Todorova, A. Deghorain, A. M. Zaitsev, Alexander Vodopyanov, R. C. Shellard, L. Di Ciaccio, Z. Hajduk, V. Nikolaenko, C. Martinez-Rivero, J. Drees, E. Higon, G. Vegni, Maciej Górski, S. Bosworth, S. De Brabandere, Krzysztof Doroba, Chiara Meroni, J. P. Tavernet, Norbert Neumeister, P. N. Ratoff, S. Simonetti, Evangelos Gazis, M. Michelotto, M. Chapkin, L. K. Resvanis, Marco Bozzo, A. M. Segar, F. Scuri, J. L. Contreras, M. Barbi, P. V. Chliapnikov, A. M. Wetherell, L. Lanceri, Stéphane Plaszczynski, F. Bianchi, P. Bruckman, O. Podobrin, Vaclav Vrba, Hans Dijkstra, M. Begalli, Massimo Caccia, P. Frenkiel, Matteo Pegoraro, M. Dracos, P. A. Fischer, M. J. Bates, F. Fontanelli, J. Dolbeau, P. Bambade, P.S.L. Booth, M. Bonesini, T. J. V. Bowcock, S. Cabrera, C. Gaspar, C. Kreuter, Peter Kluit, Patrick Jarry, G. Rinaudo, J. Salt, F. Simonetto, P. Juillot, S. Marti i Garcia, D. Edsall, G. Grosdidier, S-O. Holmgren, J. Baudot, B. Jean-Marie, T. L. Hessing, E. Karvelas, A. B. Fenyuk, G. C. Zucchelli, C. Walck, Charles Bricman, A. Firestone, A. Klovning, Y. Arnoud, U. Mjoernmark, Toralf Bernhard Skaali, T. Spassov, A. Buys, G. Leder, W. Neumann, Ugo Gasparini, D. Gamba, Klaus Hamacher, Alessandra Romero, M. L. Andrieux, A. Normand, C. Weiser, B. Åsman, V. Lepeltier, H. T. Phillips, Vladimir Cindro, P. Pages, P. Paganini, I. A. Tyapkin, R. A. Brenner, M. Witek, D. Vilanova, K. A. Drees, A. Ruiz, J. Chudova, Sandor Czellar, F. Verbeure, T. Brenke, J. Cuevas Maestro, M. Zito, M. A E Schyns, F. Kapusta, D. J. Holthuizen, M. Petrovyck, J-C. Marin, J. P. Engel, M. V. Castillo Gimenez, P. Abreu, Guido Barbiellini, Paolo Checchia, Ph. Gavillet, Louis Lyons, I. V. Ajinenko, M. Novak, K. Grzelak, M. Prest, J. Guy, B. Erzen, G. Cosme, R. Gokieli, V. Lefebure, R. Aleksan, Chiara Mariotti, D. Crennell, G. Polok, Yu. Gouz, Allan Hallgren, P. Kubinec, Juan Fuster, E. Agasi, P. Gunnarsson, B. Stugu, D. Gele, A. Onofre, Spyros Tzamarias, O. Tchikilev, Phillip Allport, Antonio Baroncelli, S. Gumenyuk, Tim Adye, P. Seager, J. J. Hernandez, M. Kaiser, J. MacNaughton, R. Barate, G. Della Ricca, E. I. Rosenberg, S. Hahn, Francesca Romana Cavallo, M. Gandelman, Th. D. Papadopoulou, G. Sajot, Ernesto Migliore, M. Gibbs, F. Naraghi, F. Mandl, G. Smadja, J. Chauveau, B. Dalmagne, Paul Dauncey, N. Demaria, G. Damgaard, Clara Troncon, Josef Strauss, S. Hoorelbeke, Paolo Ronchese, V. Chabaud, P. Delpierre, Claire Bourdarios, Luiz Mundim, N. N. Khovanski, N. J. Kjaer, M. Nieuwenhuizen, Juan Abel Barrio, K. Kurvinen, D. Wicke, B. Golob, A. Trombini, Demetrios Loukas, V. V. Lapin, D. Bertrand, S. C. Blyth, Stefano Ragazzi, G. Wilkinson, J. M. Lopez, A. Tonazzo, A. G. Olshevski, M. Merk, L. Chaussard, M. Davenport, Mogens Dam, Javier Sánchez, W. Bartl, M. Espirito Santo, W. Venus, A. Pullia, Mingshui Chen, C. De Clercq, W. J. Murray, Y. Sacquin, Piotr Zalewski, G. Myatt, Kathy Huet, Valeriy Pozdniakov, G. Tristram, R. Sekulin, F. Formenti, F. Cao, R. Alemany, U. Schwickerath, T. Bolognese, J. P. Laugier, R. Nicolaidou, I. Kronkvist, Sandra Amato, Per Jönsson, M. Pindo, K. D. Brand, Andrea Perrotta, I. Stavitski, Maria Roberta Monge, J. P. Gerber, W. Bonivento, M. Pimenta, Paul Baillon, D. Zontar, B. A. Khomenko, Alexander Lincoln Read, N. Ershaidat, Marek Szczekowski, Z. Krumstein, A. De Min, A. Stocchi, V.A. Uvarov, Francesco Navarria, I. Siccama, N. I. Zimin, Kerem Cankocak, T. Moa, Imad Baptiste Laktineh, M. Szeptycka, Konstantinos Papageorgiou, A. Tomaradze, A. Zalewska, V. Gracco, W. T. Meyer, Jacques Lemonne, L. Tortora, F. J. Harris, P. Langefeld, Cristian Stanescu, P. Branchini, O. Kouznetsov, E. K. Johansson, R. Mc Nulty, R. Orava, C. Bosio, Wolfgang Adam, E. Rosso, H. Klein, H. Schneider, E. Cortina, Steinar Stapnes, W. Ruckstuhl, J. N. Jackson, S. Squarcia, H. Saarikko, T. Tabarelli, M. Tyndel, K. Osterberg, Martino Margoni, G. Maehlum, Laurent Mirabito, T. Maron, L. Gorn, S. Lamblot, Carlos Lacasta, Krzysztof A. Rybicki, R. Lauhakangas, Ph. Charpentier, E. Fokitis, N. Vassilopoulos, P. Kokkinias, Yu. Belokopytov, C. K. Legan, G. Eigen, H. Rahmani, B. Bouquet, M. S. Bilenky, Klaus Moenig, R. Henriques, C. Joram, M. Gunther, M. Donszelmann, D. Fassouliotis, Maria Elena Pol, Ariella Cattai, V. Malychev, S. Katsanevas, F. Ledroit, Fares Djama, Danilo Zavrtanik, A. Passeri, D. Y. Bardin, M. Karlsson, Oxana Smirnova, T. Todorov, M. Wielers, K. Karafasoulis, Rupert Leitner, G. Piana, G. Matthiae, O. Ullaland, L.J. Carroll, L. Bugge, Leif J. Jönsson, K. Woschnagg, T. A. Filippas, A. J. Camacho Rozas, G. Gopal, Fabrizio Parodi, D. Z. Toet, P. Siegrist, M. A. Houlden, M. L. Turluer, D. Reid, J. E. Augustin, M. Regler, Andrei Nomerotski, William Trischuk, A. Markou, J. Medbo, I. Ripp, L. De Paula, E. Falk, J.D. Richardson, R. Janik, P. Roudeau, P. Herquet, Gianni Zumerle, A. Maio, R. Contri, Fabio Cossutti, R. Ehret, P. Poropat, T. Burgsmueller, Andromachi Tsirou, Yu. Sedykh, B. Franek, P. Weilhammer, Manolis Dris, Richard Jacobsson, Andre Augustinus, H. Mueller, A. Petrolini, B. De Lotto, Evgueni Vlasov, T. Lesiak, F. Zach, Alberto Benvenuti, S. S. Meyer, C. Caso, H. Herr, L. G. Tkatchev, A. Seitz, I. Lippi, J. H. Wickens, B. Muryn, Marco Paganoni, M. Berggren, Tiziano Rovelli, J. Masik, G. Cresetti, L. Vitale, A. P. Ostankov, F. Martinez-Vidal, D. Radojicic, H. B. Crawley, P. Lutz, L. Brillault, Luc Pape, N. Pukhaeva, W. Da Silva, W. A. Mitaroff, F. Richard, P. Chochula, P. Vincent, C. Matteuzzi, S. Almehed, R. Chierici, F. Hahn, J. Dahm, B. Tome, P. Antilogus, C. Vander Velde, F. Stichelbaut, P. Buschmann, R. Mc Kay, A. Andreazza, R. Keranen, Francisco Matorras, D. Souza-Santos, G. A. Chelkov, Ugo Amaldi, W. Kucewicz, W. De Boer, Marc Winter, H. Wahlen, V. Ruhlmann-Kleider, E. Zevgolatakos, K. H. Becks, E. Vallazza, G. Sciolla, M. Battaglia, W. Van Doninck, J. Garcia, V. Obraztsov, T. Buran, Markus Elsing, I. Roncagliolo, R. Zuberi, Olga Botner, Krzysztof Korcyl, G. Transtromer, Carmen García, C. Defoix, F. Fulda-Quenzer, E. Graziani, J. M. Brunet, H. Foeth, B. Ueberschaer, A. De Angelis, P. Collins, Maurizio Canepa, Daniel Bloch, Ahmimed Ouraou, M. Feindt, S. Sánchez Navas, P. Negri, P. Sponholz, Göran Jarlskog, Ch. Jarlskog, W. D. Apel, F. Carena, P. B. Renton, E. Spiriti, D. C. Fries, B. Marechal, E. C. Katsoufis, Marta Calvi, Vincenzo Canale, Geoffrey Smith, M. Pernicka, Jesus Marco, G. Lenzen, R. Strub, V. Kostioukhine, M. Koratzinos, Dietrich Liko, P. Privitera, J. Van Eldik, Heinz Pernegger, T. S. Hill, Chariclia Petridou, M. Schimmelpfennig, P. Rebecchi, Branislav Sitar, M. Reale, Daniel Treille, M. Bigi, G. W. Van Apeldoorn, L. Ventura, K. Yip, J. Ridky, R. Lindner, Y. Lemoigne, C. Parkes, Nikita Smirnov, M. Weierstall, Christine Kourkoumelis, E. Dahl-Jensen, P. Van Dam, C. De La Vaissiere, A. Tilquin, Pawel Jalocha, Barry King, R. Frühwirth, J. Timmermans, A. Lipniacka, E. Boudinov, B. Koene, Paolo Morettini, J. G. Loken, C. De Saint-Jean, P. Beilliere, Krzysztof Nawrocki, W. Hao, O. Barring, and Tord Ekelof

Subjects
Nuclear physics, Physics, Particle physics, Physics and Astronomy (miscellaneous), Meson, Hadron, Decay length, Invariant mass, Probability density distribution
Abstract

This paper presents an update of the measurement of the mean lifetime of theBs0 meson. CombiningDs−l,Ds−h,φ−l and inclusiveDs final states from the 3.2 million hadronic Z decays collected by DELPHI between 1991 and 1994, theBs0 mean lifetime was measured to be:τ(Bs0)=1.67±0.14 ps.

Published
1996

3. A measurement of B+ and B0 lifetimes using $$\bar D\ell ^ + $$ events

Author

A. G. Olshevski, K. Stepaniak, H. Furstenau, Maria Roberta Monge, A. Zalewska, W. T. Meyer, M. Feindt, S. Sánchez Navas, P. Negri, C. Vander Velde, Jacques Lemonne, F. Stichelbaut, Tord Ekelof, H. Staeck, G. A. Chelkov, Ugo Amaldi, W. De Boer, E. Zevgolatakos, Göran Jarlskog, A. N. Sisakian, R. Mc Kay, Laurent Mirabito, A. Andreazza, B. Loerstad, G. Sciolla, O. Podobrin, A. Sadovsky, Ugo Gasparini, W. D. Apel, Luis Peralta, F. Kapusta, W. Van Doninck, R. Sosnowski, P. Vincent, F. Naraghi, K. A. Drees, T. Todorov, M. Wielers, Guido Barbiellini, J. Guy, A. Lopez-Fernandez, Dietrich Liko, P. Privitera, Jorge-Armando Benitez Garcia, Manfred Krammer, Robert S. Brown, J. E. Augustin, A. Pullia, Z. Krumstein, A. Baroncelli, Tim Adye, C. Zacharatou, M. Michelotto, O. Yushchenko, R. Keranen, Francisco Matorras, D. Gillespie, Chariclia Petridou, A. Galloni, D. Souza-Santos, R. Sekulin, S. O. Holmgren, L. S. Vertogradov, M. L. Turluer, D. Reid, Klaus Hamacher, P. Kubinec, Clara Troncon, J. P. Tavernet, Branislav Sitar, V. Obraztsov, Daniel Treille, M. Bigi, G. Vegni, G. Valenti, G. W. Van Apeldoorn, A. De Min, A. Trombini, I. Roncagliolo, J. Ridky, T. Moa, G. Maehlum, Matteo Pegoraro, W. Oberschulte-Beckmann, R. A. Brenner, S. J. Alvsvaag, E. Agasi, I. Siccama, R. C. Shellard, L. Di Ciaccio, Josef Hrubec, Gianni Zumerle, Stefano Ragazzi, C. Kreuter, C. Parkes, P. Van Dam, F. Formenti, Nikita Smirnov, F. Pierre, L. Ventura, K. Yip, Y. Lemoigne, Vincent Hedberg, D. W. Lane, C. Caso, M. Battaglia, P. Poropat, G. Sajot, Fares Djama, A. M. Segar, F. Cao, Andromachi Tsirou, F. Fontanelli, S. Marti i Garcia, D. Edsall, G. Grosdidier, K. D. Brand, N. I. Zimin, G. Ekspong, I. Lippi, William Trischuk, A. Markou, J. Dolbeau, O. Smirnova, Patrick Jarry, G. Rinaudo, Marek Szczekowski, Alessandra Romero, Andre Augustinus, A. Wehr, J. P. Gerber, W. Neumann, W. Kucewicz, P. N. Ratoff, Marc Winter, F. Carena, S. Simonetti, Tiziano Rovelli, M. Begalli, M. Reale, Mogens Dam, J. H. Wickens, G. Borisov, R. Henriques, C. De La Vaissiere, A. Ruiz, Tiziano Camporesi, D. Vilanova, Y. Dufour, M. A E Schyns, J. M. Lopez, Themistocles Bowcock, Mariusz Witek, N. Ershaidat, A. Ferrer, V. Bocci, J-C. Marin, P. Bambade, B. Muryn, M. Baubillier, Achille Stocchi, P.S.L. Booth, Marco Paganoni, Jose Luis Contreras, Charles Bricman, H. B. Crawley, A. Tomaradze, W.S.C. Williams, M. Weierstall, B. Erzen, R. Gokieli, M. Gunther, P. Gunnarsson, Spyros Tzamarias, O. Tchikilev, M. Pernicka, A. Onofre, Rupert Leitner, G. Piana, E. K. Johansson, G. Matthiae, Steinar Stapnes, F. Zach, H. Wahlen, Borge Svane Nielsen, Jesus Marco, G. Lenzen, R. Strub, C. Joram, A. Tilquin, Josef Strauss, O. Kouznetsov, Sandor Czellar, G. Polok, V. Chabaud, W. Venus, L. Vitale, D. Radojicic, Lucio Cerrito, V. Chorowicz, L. Brillault, Pawel Jalocha, Barry King, J. P. Engel, M. V. Castillo Gimenez, J. H. Koehne, E. Spiriti, Stanislav Nemecek, R. Frühwirth, J. Timmermans, N. Pukhaeva, J. Dahm, Yu. Gouz, M. Davenport, P. Herquet, P. Niss, N. Vassilopoulos, Luc Pape, Alexander Vodopyanov, F. Bianchi, Martino Margoni, E. Fokitis, G. D. Alekseev, Christine Kourkoumelis, E. Dahl-Jensen, V. Malychev, E. I. Rosenberg, K. Kurvinen, G. Cosme, E. Rosso, H. Klein, K. Osterberg, P. Carrilho, J. J. Hernandez, S. De Brabandere, R. Nicolaidou, R. Contri, D. Wicke, Javier Sánchez, P. J. Holt, N. G. Redaelli, Marco Bozzo, Mario Sannino, Ernesto Migliore, V. Ruhlmann-Kleider, K. H. Becks, E. Vallazza, B. Dalmagne, M. Verlato, Krzysztof Doroba, Chiara Meroni, Louis Lyons, R. Aleksan, P. Delpierre, P. Lutz, V. Ronjin, F. Martinez-Vidal, V. Kostioukhine, M. Koratzinos, E. Karvelas, P. Bruckman, A. Maio, C. Martinez-Rivero, L. Bugge, Paul Dauncey, N. Demaria, G. Damgaard, I. Kronkvist, M. Mazzucato, F. Simonetto, K. Hultqvist, A. Lipniacka, A. G. Frodesen, Maria Elena Pol, Milos Lokajicek, S. Katsanevas, R. Lindner, J. Cuevas Maestro, Demetrios Loukas, G. Leder, G. Myatt, J.D. Richardson, Richard Jacobsson, B. Åsman, A. Petrolini, W. Krupinski, A. J. Camacho Rozas, D. Z. Toet, P. Siegrist, P. Frenkiel, Peter Kluit, M. J. Bates, Manolis Dris, M. Gibbs, V. Gracco, F. Waldner, B. De Lotto, P. Roudeau, G. Crosetti, Evgueni Vlasov, V. Lefebure, Z. Hajduk, D. Crennell, F. Mandl, D. Bertrand, L. Tortora, F. J. Harris, I. Ripp, R. Janik, A. Klovning, Y. Arnoud, U. Mjoernmark, C. Bosio, H. J. Hilke, P. B. Renton, R. Moeller, H. Herr, Paolo Ronchese, Maciej Górski, D. Y. Bardin, Alberto Benvenuti, L. G. Tkatchev, M. Karlsson, N. J. Kjaer, V. Nikolaenko, Carlos Lacasta, T. A. Filippas, M. Regler, A. Seitz, D. J. Holthuizen, L. K. Resvanis, B. Tome, P. Antilogus, B. Koene, E. Cortina, D. C. Fries, Massimo Caccia, J. Baudot, C. Walck, M. Berggren, Toralf Bernhard Skaali, T. Spassov, D. Gamba, Y. Sacquin, Oleg Solovyanov, R. Lauhakangas, Ph. Charpentier, H. T. Phillips, Vladimir Cindro, W. Ruckstuhl, M. L. Andrieux, T. L. Hessing, P. V. Chliapnikov, R. Ehret, G. Tristram, Yu. Sedykh, P. Juillot, H. Mueller, Paolo Morettini, B. Marechal, E. C. Katsoufis, J. G. Loken, C. De Saint-Jean, P. Beilliere, Wolfgang Adam, Marta Calvi, Klaus Moenig, Fabrizio Parodi, F. Dupont, A. Normand, F. Verbeure, M. S. Bilenky, Vincenzo Canale, Geoffrey Smith, M. A. Houlden, L.J. Carroll, A. Passeri, Yu. Belokopytov, M. Donszelmann, R. Barate, G. E. Kalmus, Danilo Zavrtanik, H. Palka, J. Medbo, Andrea Perrotta, Fabio Cossutti, W. Hao, P. Weilhammer, J. W. Lamsa, Jan Krolikowski, Luiz Mundim, N. N. Khovanski, W. Bartl, M. Blume, F. Barao, T. Lesiak, B. Stugu, M. A. Lopez Aguera, S. Lamblot, W. Da Silva, M. Gandelman, Phillip Allport, G. Della Ricca, W. A. Mitaroff, Th. D. Papadopoulou, G. Smadja, J. Van Eldik, R. Orava, Heinz Pernegger, G. Eigen, O. Barring, T. S. Hill, J. P. Laugier, E. Higon, S. C. Blyth, G. Wilkinson, S. Bosworth, B. Bouquet, F. Richard, P. Chochula, C. Matteuzzi, A. Daum, S. Ueberschaer, Cristian Stanescu, M. Hahn, S. Almehed, P. Branchini, R. Chierici, M. Pimenta, B. A. Khomenko, H. Schneider, F. Hahn, F. Scuri, R. Mc Nulty, A. M. Wetherell, Francesco Navarria, H. De Boeck, L. Lanceri, Stéphane Plaszczynski, P. Langefeld, Gary John Barker, B. Jean-Marie, M. Tyndel, K. Woschnagg, T. Maron, P. Abreu, A. Firestone, G. Gopal, D. Gele, A. Buys, L. De Paula, L. Gorn, E. Falk, I. Stavitski, Juan Abel Barrio, P. Pages, M. Zito, Paul Baillon, Sandra Amato, D. Zontar, Alexander Lincoln Read, M. Szeptycka, Chiara Mariotti, M. Prest, R. Mc Cubbin, Allan Hallgren, S. Hahn, Francesca Romana Cavallo, Imad Baptiste Laktineh, U. Haedinger, C. De Clercq, S. Squarcia, H. Saarikko, T. Tabarelli, W. J. Murray, P. Rebecchi, H. Rahmani, D. Fassouliotis, Ariella Cattai, F. Ledroit, J. Fuster, O. Ullaland, Leif J. Jönsson, Andrei Nomerotski, B. Franek, Lydia Roos, J. Drees, Evangelos Gazis, M. Dracos, L. Chaussard, P. A. Fischer, P. Joannou, J. Chauveau, I. A. Tyapkin, I. V. Ajinenko, M. Bonesini, Kathy Huet, Valeriy Pozdniakov, T. Bolognese, Per Jönsson, W. Bonivento, Kerem Cankocak, Piotr Zalewski, V.A. Uvarov, J. N. Jackson, B. Golob, T. Buran, Markus Elsing, J. Rames, P. Kokkinias, C. K. Legan, R. Zuberi, Olga Botner, P. H. Kramer, G. Transtromer, Carmen García, Pierre Billoir, H. Foeth, B. Ueberschaer, A. De Angelis, P. Collins, Maurizio Canepa, Daniel Bloch, Ahmimed Ouraou, M. Chapkin, Vaclav Vrba, C. Defoix, Hans Dijkstra, F. Fulda-Quenzer, C. Gaspar, E. Graziani, J. M. Brunet, A. B. Fenyuk, G. C. Zucchelli, V. Lepeltier, Paolo Checchia, Ph. Gavillet, M. Kaiser, J. MacNaughton, Claire Bourdarios, P. Paganini, and M. Nieuwenhuizen

Subjects
Physics, Particle physics, Physics and Astronomy (miscellaneous), Meson, 010308 nuclear & particles physics, Electron–positron annihilation, High Energy Physics::Phenomenology, 7. Clean energy, 01 natural sciences, Nuclear physics, 0103 physical sciences, Decay length, Large Electron–Positron Collider, D meson, High Energy Physics::Experiment, B meson, Astrophysics::Earth and Planetary Astrophysics, Nuclear Experiment, 010306 general physics, Engineering (miscellaneous), Lepton, Bar (unit)
Abstract

A measurement of B meson lifetimes is presented using data collected from 1991 to 1993 by the DELPHI detector at the LEP collider. Samples of events with a D meson and a lepton in the same jet are selected where\(\bar D^{^0 } \ell ^ + \) and D*l+ events originate mainly from the semileptonic decays of B+ and B0 mesons, respectively. From the reconstructed B decay length and the estimated B momentum, taking into account the dilution due to B decays into\(\bar D^{^{**} } \ell ^ + v\), the following B meson lifetimes and lifetime ratio are measured: $$\begin{gathered} \tau (B^ + ) = 1.61_{ - 0.16}^{ + 0.16} (stat.) \pm 0.12(syst.) ps \hfill \\ \tau (B^0 ) = 1.61_{ - 0.13}^{ + 0.14} (stat.) \pm 0.08(syst.) ps \hfill \\ \tau (B^ + )/\tau (B^0 ) = 1.00_{ - 0.15}^{ + 0.17} (stat.) \pm 0.10(syst.) \hfill \\ \end{gathered} $$ and an average lifetime of B+ and B0 mesons is obtained: $$\tau (B) = 1.61_{ - 0.07}^{ + 0.08} (stat.) \pm 0.05(syst.) ps$$

Published
1995

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