Measurement of the b hadron lifetime with the dipole method

D. Buskulic*, I. De Bonis, D. Decamp, P. Ghez, C. Goy, J. P. Lees, M. N. Minard, B. Pietrzyk, F. Ariztizabal, P. Comas, J. M. Crespo, M. Delfino, I. Efthymiopoulos, E. Fernandez, M. Fernandez-Bosman, V. Gaitan, Ll Garrido, T. Mattison, A. Pacheco, C. PadillaA. Pascual, D. Creanza, M. de Palma, A. Farilla, G. Iaselli, G. Maggi, N. Marinelli, S. Natali, S. Nuzzo, A. Ranieri, G. Raso, F. Romano, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, G. Zito, Y. Chai, H. Hu, D. Huang, X. Huang, J. Lin, T. Wang, Y. Xie, D. Xu, R. Xu, J. Zhang, L. Zhang, W. Zhao, G. Bonvicini, J. Boudreau, D. Casper, H. Drevermann, R. W. Forty, G. Ganis, C. Gay, R. Hagelberg, J. Harvey, J. Hilgart, R. Jacobsen, B. Jost, J. Knobloch, I. Lehraus, M. Maggi, C. Markou, M. Martinez, P. Mato, H. Meinhard, A. Minten, R. Miquel, H. G. Moser, P. Palazzi, J. R. Pater, J. A. Perlas, J. F. Pusztaszeri, F. Ranjard, L. Rolandi, J. Rothberg, T. Ruan, M. Saich, D. Schlatter, M. Schmelling, F. Sefkow, W. Tejessy, I. R. Tomalin, R. Veenhof, H. Wachsmuth, S. Wasserbaech, W. Wiedenmann, T. Wildish, W. Witzeling, J. Wotschack, Z. Ajaltouni, F. Badaud, M. Bardadin-Otwinowska, R. El Fellous, A. Falvard, P. Gay, C. Guicheney, P. Henrard, J. Jousset, B. Michel, J. C. Montret, D. Pallin, P. Perret, F. Podlyski, J. Proriol, F. Prulhière, F. Saadi, T. Fearnley, J. B. Hansen, J. D. Hansen, J. R. Hansen, P. H. Hansen, R. Møllerud, B. S. Nilsson, A. Kyriakis, E. Simopoulou, I. Siotis, A. Vayaki, K. Zachariadou, J. Badier, A. Blondel, G. Bonneaud, J. C. Brient, P. Bourdon, G. Fouque, S. Orteu, A. Rougé, M. Rumpf, R. Tanaka, M. Verderi, H. Videau, D. J. Candlin, M. I. Parsons, E. Veitch, E. Focardi, L. Moneta, G. Parrini, M. Corden, C. Georgiopoulos, M. Ikeda, D. Levinthal, A. Antonelli, R. Baldini, G. Bencivenni, G. Bologna, F. Bossi, P. Campana, G. Capon, F. Cerutti, V. Chiarella, B. D'Ettorre-Piazzoli, G. Felici, P. Laurelli, G. Mannocchi, F. Murtas, G. P. Murtas, L. Passalacqua, M. Pepe-Altarelli, P. Picchi, P. Colrain, I. ten Have, J. G. Lynch, W. Maitland, W. T. Morton, C. Raine, P. Reeves, J. M. Scarr, K. Smith, M. G. Smith, A. S. Thompson, R. M. Turnbull, B. Brandl, O. Braun, C. Geweniger, P. Hanke, V. Hepp, E. E. Kluge, Y. Maumary, A. Putzer, B. Rensch, A. Stahl, K. Tittel, M. Wunsch, R. Beuselinck, D. M. Binnie, W. Cameron, M. Cattaneo, D. J. Colling, P. J. Dornan, A. M. Greene, J. F. Hassard, N. M. Lieske, A. Moutoussi, J. Nash, S. Patton, D. G. Payne, M. J. Phillips, G. San Martin, J. K. Sedgbeer, A. G. Wright, P. Girtler, D. Kuhn, G. Rudolph, R. Vogl, C. K. Bowdery, T. J. Brodbeck, A. J. Finch, F. Foster, G. Hughes, D. Jackson, N. R. Keemer, M. Nuttall, A. Patel, T. Sloan, S. W. Snow, E. P. Whelan, K. Kleinknecht, J. Raab, B. Renk, H. G. Sander, H. Schmidt, S. M. Walther, R. Wanke, B. Wolf, A. Zimmermann, A. M. Bencheikh, C. Benchouk, A. Bonissent, J. Carr, P. Coyle, J. Drinkard, F. Etienne, D. Nicod, S. Papalexiou, P. Payre, L. Roos, D. Rousseau, P. Schwemling, M. Talby, S. Adlung, R. Assmann, C. Bauer, W. Blum, D. Brown, P. Cattaneo, B. Dehning, H. Dietl, F. Dydak, M. Frank, A. W. Halley, K. Jakobs, J. Lauber, G. Lütjens, G. Lutz, W. Männer, R. Richter, J. Schröder, A. S. Schwarz, R. Settles, H. Seywerd, U. Stierlin, U. Stiegler, R. St. Denis, G. Wolf, R. Alemany, J. Boucrot, O. Callot, A. Cordier, M. Davier, L. Duflot, J. F. Grivaz, Ph Heusse, D. E. Jaffe, P. Janot, D. W. Kim, F. Le Diberder, J. Lefrançois, A. M. Lutz, M. H. Schune, J. J. Veillet, I. Videau, Z. Zhang, D. Abbaneo, G. Bagliesi, G. Batignani, U. Bottigli, C. Bozzi, G. Calderini, M. Carpinelli, M. A. Ciocci, V. Ciulli, R. Dell'Orso, I. Ferrante, F. Fidecaro, L. Foà, F. Forti, A. Giassi, M. A. Giorgi, A. Gregorio, F. Ligabue, A. Lusiani, E. B. Mannelli, P. S. Marrocchesi, A. Messineo, F. Palla, G. Rizzo, G. Sanguinetti, P. Spagnolo, J. Steinberger, R. Tenchini, G. Tonelli, G. Triggiani, A. Valassi, C. Vannini, A. Venturi, P. G. Verdini, J. Walsh, A. P. Betteridge, Y. Gao, M. G. Green, P. V. March, Ll M. Mir, T. Medcalf, I. S. Quazi, J. A. Strong, L. R. West, D. R. Botterill, R. W. Clifft, T. R. Edgecock, S. Haywood, P. R. Norton, J. C. Thompson, B. Bloch-Devaux, P. Colas, H. Duarte, S. Emery, W. Kozanecki, E. Lançon, M. C. Lemaire, E. Locci, B. Marx, P. Perez, J. Rander, J. F. Renardy, A. Rosowsky, A. Roussarie, J. P. Schuller, J. Schwindling, D. Si Mohand, B. Vallage, R. P. Johnson, A. M. Litke, G. Taylor, J. Wear, J. G. Ashman, W. Babbage, C. N. Booth, C. Buttar, S. Cartwright, F. Combley, I. Dawson, L. F. Thompson, E. Barbeiro, A. Böhrer, S. Brandt, G. Cowan, C. Grupen, G. Lutters, F. Rivera, U. Schäfer, L. Smolik, L. Bosisio, R. Della Marina, G. Giannini, B. Gobbo, F. Ragusa, L. Bellantoni, W. Chen, J. S. Conway, Z. Feng, D. P S Ferguson, Y. S. Gao, J. Grahl, J. L. Harton, O. J. Hayes, J. M. Nachtman, Y. B. Pan, Y. Saadi, M. Schmitt, I. Scott, V. Sharma, Z. H. Shi, J. D. Turk, A. M. Walsh, F. V. Weber, Lan Wu Sau Lan Wu, X. Wu, M. Zheng, G. Zobernig

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

A measurement of the average lifetime of b hadrons has been performed with dipole method on a sample of 260 000 hadronic Z decays recorded with the ALEPH detector during 1991. The dipole is the distance between the vertices built in the opposite hemispheres. The mean dipole is extracted from all the events without attempting b enrichment. Comparing the average of the data dipole distribution with a Monte Carlo calibration curve obtained with different b lifetimes, an average b hadron lifetime of 1.51±0.08 ps is extracted.

Original languageEnglish (US)
Pages (from-to)459-470
Number of pages12
JournalPhysics Letters B
Volume314
Issue number3-4
DOIs
StatePublished - Sep 23 1993

Funding

l NOW at CERN, PPE Division, 1211 Geneva 23, Switzerland. 2 Permanent address: University of Washington, Seattle, WA 98195, USA. 3 Now at University of California, Irvine, CA 92717, USA. 4 Also Istituto di Fisica Generale, Universit~ di Torino, Torino, Italy. 5 Also Istituto di Cosmo-Geofisica del CNR, Torino, Italy. 6 Now at DESY, Hamburg, Germany. 7 Supported by CICYT, Spain. 8 Supported by the National Science Foundation of China. 9 Supported by the Danish Natural Science Research Council. 10 Supported by the UK Science and Engineering Research Council. I I Supported by the US Department of Energy, contract DE-AC02-76ER00881. 12 Supported by the US Department of Energy, contract DE-FG05-87ER40319. 13 Supported by the NSF, contract PHY-8451274. 14 Supported by the US Department of Energy, contract DE-FC05-85ER250000. 15 Supported by SLOAN fellowship, contract BR 2703. t6 Supported by the Bundesministerium fiir Forschung und Technologie, Germany. 17 Supported by the Direction des Sciences de la Matibre, CEA. 18 Supported by Fonds zur F6rderung der wissenschaftlichen Forschung, Austria. 19 Supported by the Korean Science and Engineering Foun-dation and Ministry of Education. 20 Now at Dipartimento di Fisica, Universith di Milano, Milano, Italy. 21 Also at CERN, PPE Division, 1211 Geneva 23, Switzerland. 22 Also at Universith di Napoli, Dipartimento di Scienze Fisiche, Napoli, Italy. 23 Supported by the US Department of Energy, grant DE-FG03-92ER40689. 24 Now at Universith di Pavia, Pavia, Italy. 25 Now at Rutgers University, Piscataway, NJ 08854, USA.

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Fingerprint

Dive into the research topics of 'Measurement of the b hadron lifetime with the dipole method'. Together they form a unique fingerprint.

Cite this