Study of the fragmentation of b quarks into B mesons at the Z peak

Authors
Heister, A Schael, S Barate, R De Bonis, I Decamp, D 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, C Ruggieri, E 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 Azzurri, P Boix, G Buchmuller, O Cattaneo, M Cerutti, F Clerbaux, B Dissertori, G Drevermann, H Forty, RW Frank, M Greening, TC Hansen, JB Harvey, J Janot, P Jost, B Kado, M Mato, P Moutoussi, A Ranjard, F Rolandi, L Schlatter, D Schneider, O Spagnolo, P Tejessy, W Teubert, F Tournefier, E Ward, J Ajaltouni, Z Badaud, F Falvard, A Gay, P Henrard, P Jousset, J Michel, B Monteil, S Montret, JC Pallin, D Perret, P Podlyski, F Hansen, PD Hansen, JR Hansen, PH Nilsson, BS Waananen, A Kyriakis, A Markou, C Simopoulou, E Vayaki, A Zachariadou, K Blondel, A Bonneaud, G Brient, JC Rouge, A Rumpf, M Swynghedauw, M Verderi, M Videau, H Ciulli, V Focardi, E Parrini, G 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 Thompson, AS Wasserbaech, S 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 Ghete, VM Girtler, P Kneringer, E Kuhn, D Rudolph, G Bouhova-Thacker, E Bowdery, CK Finch, AJ Foster, F Hughes, G Jones, RWL Pearson, MR 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 David, A Dietl, H Ganis, G Huttmann, K Lutjens, G Mannert, C Manner, W Moser, HG Settles, R Stenzel, H Wiedenmann, W Wolf, G Boucrot, J Callot, O Davier, M Duflot, L Grivaz, JF Heusse, P Jacholkowska, A Lefrancois, J Veillet, JJ Videau, I Yuan, C Bagliesi, G Boccali, T Calderini, G Foa, L Giammanco, A Giassi, A Ligabue, F Messineo, A Palla, F Sanguinetti, G Sciaba, A Sguazzoni, G Tenchini, R Venturi, A Verdini, PG Blair, GA Cowan, G Green, MG Medcalf, T Misiejuk, A Strong, JA Teixeira-Dias, P 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 Konstantinidis, N Litke, AM Taylor, G Booth, CN Cartwright, S Combley, F Lehto, M Thompson, LF Affholderbach, K Bohrer, A Brandt, S Grupen, C Ngac, A Prange, G Sieler, U Giannini, G Rothberg, J 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
A. Heister et al., Study of the fragmentation of b quarks into B mesons at the Z peak, PHYS LETT B, 512(1-2), 2001, pp. 30-48
Citations number
20
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS B
ISSN journal
0370-2693 → ACNP
Volume
512
Issue
1-2
Year of publication
2001
Pages
30 - 48
Database
ISI
SICI code
0370-2693(20010712)512:1-2<30:SOTFOB>2.0.ZU;2-X
Abstract
The fragmentation of b quarks into B mesons is studied with four million ha dronic Z decays collected by the ALEPH experiment during the years 1991-199 5. A semi-exclusive reconstruction of B --> lvD((*)) decays is performed, b y combining lepton candidates with fully reconstructed D-(*) mesons while t he neutrino energy is estimated from the missing energy of the event. The m ean value of x(B)(wd), the energy of the weakly-decaying B meson normalised to the beam energy, is found to be (x(B)(wd)) = 0.716 +/- 0.006 (stat) +/- 0.006 (syst), using a model-independent method; the corresponding value fo r the energy of the leading B meson is (x(B)(L)) = 0.736 +/- 0.006 (stat) /- 0.006 (syst). The reconstructed spectra are compared with different frag mentation models. (C) 2001 Published by Elsevier Science B.V.