The fragmentation of b quarks into B mesons is studied with four million hadronic Z decays collected by the ALEPH experiment during the years 1991-1995. A semi-exclusive reconstruction of B --> lvD((*)) decays is performed, by combining lepton candidates with fully reconstructed D((*)) mesons while the neutrino energy is estimated from the missing energy of the event. The mean 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 for 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 fragmentation models. (C) 2001 Published by Elsevier Science B.V.

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

MESSINEO, ALBERTO MARIA;
2001

Abstract

The fragmentation of b quarks into B mesons is studied with four million hadronic Z decays collected by the ALEPH experiment during the years 1991-1995. A semi-exclusive reconstruction of B --> lvD((*)) decays is performed, by combining lepton candidates with fully reconstructed D((*)) mesons while the neutrino energy is estimated from the missing energy of the event. The mean 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 for 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 fragmentation models. (C) 2001 Published by Elsevier Science B.V.
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, ALBERTO MARIA; 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.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11568/178527
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