Measurement of the (B)over-bar(0) and B- meson lifetimes

Authors
Barate, R Decamp, D Ghez, P Goy, C Lees, JP Merle, E Minard, MN Pietrzyk, B Bravo, S Casado, MP Chmeissani, M Crespo, JM Fernandez, E Fernandez-Bosman, M Garrido, L Grauges, E Martinez, M Merino, G Miquel, R Mir, LM Pacheco, A Ruiz, H Colaleo, A Creanza, D de Palma, M Iaselli, G Maggi, G Maggi, M Nuzzo, S Ranieri, A Raso, G Ruggieri, F Selvaggi, G Silvestris, L Tempesta, P Tricomi, A Zito, G Huang, X Lin, J Ouyang, Q Wang, T Xie, Y Xu, R Xue, S Zhang, J Zhang, L Zhao, W Abbaneo, D Boix, G Buchmuller, O Cattaneo, M Cerutti, F Dissertori, G Drevermann, H Forty, RW Frank, M Greening, TC Hansen, JB Harvey, J Janot, P Jost, B Lehraus, I Mato, P Minten, A Moutoussi, A Ranjard, F Rolandi, L Schlatter, D Schmitt, M Schneider, O Spagnolo, P Tejessy, W Teubert, F Tournefier, E Wright, AE Ajaltouni, Z Badaud, F Chazelle, G Deschamps, O Falvard, A Gay, P Guicheney, C Henrard, P Jousset, J Michel, B Monteil, S Montret, JC Pallin, D Perret, P Podlyski, F Hansen, JD Hansen, JR Hansen, PH Nilsson, BS Waananen, A Daskalakis, G Kyriakis, A Markou, C Simopoulou, E Vayaki, A Blondel, A Bonneaud, G Brient, JC Rouge, A Rumpf, M Swynghedauw, M Verderi, M Videau, H Focardi, E Parrini, G Zachariadou, K Antonelli, A Antonelli, M Bencivenni, G Bologna, G Bossi, F Campana, P Capon, G Chiarella, V Laurelli, P Mannocchi, G Murtas, F Murtas, GP Passalacqua, L Pepe-Altarelli, M Halley, AW Lynch, JG Negus, P O'Shea, V Raine, C Teixeira-Dias, P Thompson, AS Cavanaugh, R Dhamotharan, S Geweniger, C Hanke, P Hansper, G Hepp, V Kluge, EE Putzer, A Sommer, J Tittel, K Werner, S Wunsch, M Beuselinck, R Binnie, DM Cameron, W Dornan, PJ Girone, M Marinelli, N Sedgbeer, JK Thompson, JC Thomson, E Ghete, VM Girtler, P Kneringer, E Kuhn, D Rudolph, G Bowdery, CK Buck, PG Finch, AJ Foster, F Hughes, G Jones, RWL Robertson, NA Giehl, I Jakobs, K Kleinknecht, K Quast, G Renk, B Rohne, E Sander, HG Wachsmuth, H Zeitnitz, C Bonissent, A Carr, J Coyle, P Leroy, O Payre, P Rousseau, D Talby, M Aleppo, M Ragusa, F Dietl, H Ganis, G Heister, A Huttmann, K Lutjens, G Mannert, C Manner, W Moser, HG Schael, S Settles, R Stenzel, H Wiedenmann, W Wolf, G Azzurri, P Boucrot, J Callot, O Chen, S Cordier, A Davier, M Duflot, L Grivaz, JF Heusse, P Jacholkowska, A Le Diberder, F Lefrancois, J Lutz, AM Schune, MH Veillet, JJ Videau, I Yuan, C Zerwas, D Bagliesi, G Boccali, T Calderini, G Ciulli, V Foa, L Giassi, A Ligabue, F Messineo, A Palla, F Rizzo, G Sanguinetti, G Sciaba, A Sguazzoni, G Tenchini, R Venturi, A Verdini, PG Blair, GA Cowan, G Green, MG Medcalf, T Strong, JA von Wimmersperg-Toeller, JH Clifft, RW Edgecock, TR Norton, PR Tomalin, IR Bloch-Devaux, B Colas, P Emery, S Kozanecki, W Lancon, E Lemaire, MC Locci, E Perez, P Rander, J Renardy, JF Roussarie, A Schuller, JP Schwindling, J Trabelsi, A Vallage, B Black, SN Dann, JH Johnson, RP Kim, HY Konstantinidis, N Litke, AM McNeil, MA Taylor, G Booth, CN Cartwright, S Combley, F Lehto, M Thompson, LF Affholderbach, K Bohrer, A Brandt, S Grupen, C Misiejuk, A Prange, G Sieler, U Giannini, G Gobbo, B Rothberg, J Wasserbaech, S Armstrong, SR Cranmer, K Elmer, P Ferguson, DPS Gao, Y Gonzalez, S Hayes, OJ Hu, H Jin, S Kile, J McNamara, PA Nielsen, J Orejudos, W Pan, YB Saadi, Y Scott, IJ Walsh, J Wu, SL Wu, X Zobernig, G
Citation
R. Barate et al., Measurement of the (B)over-bar(0) and B- meson lifetimes, PHYS LETT B, 492(3-4), 2000, pp. 275-287
Citations number
26
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS B
ISSN journal
03702693 → ACNP
Volume
492
Issue
3-4
Year of publication
2000
Pages
275 - 287
Database
ISI
SICI code
0370-2693(20001102)492:3-4<275:MOT(AB>2.0.ZU;2-O
Abstract
The lifetimes of the (B) over bar (0) and B- mesons are measured using a sa mple of about four million hadronic Z decays collected from 1991 to 1995 wi th the ALEPH detector at LEP. The data sample has been recently reprocessed , achieving a substantial improvement in the tracking performance. Semilept onic decays of (B) over bar (0) and B- mesons are partially reconstructed b y identifying events containing a lepton with an associated D*(+) or D-0 me son, The proper time of the B meson is estimated from the measured decay le ngth and the momentum of the D-lepton system. A fit to the proper time of 1 880 D*(+)l(-) and 2856 D(0)l(-) candidates yields the following results: ta u ((B) over bar0) = 1.518 +/- 0.053 +/- 0.034 ps, tau (B-) = 1.648 +/- 0.04 9 +/- 0.035 ps, tau (B-)/tau ((B) over bar0) = 1.085 +/- 0.059 +/- 0.018. ( C) 2000 Elsevier Science B.V. All rights reserved.