In 160 000 hadronic Z decays recorded with the ALEPH detector at LEP, the yields of Λℓ- and Λℓ+ combinations have been measured. The observed excess of Λℓ- over Λℓ+ of 53±13 is interpreted as evidence for b baryons and their semileptonic decay. Assuming that three body decay processes such as Λb→Λc +ℓ -v dominate the semileptonic decay of b baryons, this ex cess corresponds to a product branching ratio BR(b→Λb)·BR(Λb→ Λc +ℓ-v)·BR(Λ c +→ΛX) = (0.95±0.22 (stat.)±0.21(syst.))%, where Λb and Λc + denote the bottom and charm baryons respectively.

Decamp, D., Deschizeaux, B., Goy, C., Lees, J., Minard, M., Alemany, R., et al. (1992). Evidence for b baryons in Z decays. PHYSICS LETTERS. SECTION B, 278(1-2), 209-216 [10.1016/0370-2693(92)90736-N].

Evidence for b baryons in Z decays

CARPINELLI, Massimo;
1992

Abstract

In 160 000 hadronic Z decays recorded with the ALEPH detector at LEP, the yields of Λℓ- and Λℓ+ combinations have been measured. The observed excess of Λℓ- over Λℓ+ of 53±13 is interpreted as evidence for b baryons and their semileptonic decay. Assuming that three body decay processes such as Λb→Λc +ℓ -v dominate the semileptonic decay of b baryons, this ex cess corresponds to a product branching ratio BR(b→Λb)·BR(Λb→ Λc +ℓ-v)·BR(Λ c +→ΛX) = (0.95±0.22 (stat.)±0.21(syst.))%, where Λb and Λc + denote the bottom and charm baryons respectively.
Articolo in rivista - Articolo scientifico
Physics
English
209
216
8
Decamp, D., Deschizeaux, B., Goy, C., Lees, J., Minard, M., Alemany, R., et al. (1992). Evidence for b baryons in Z decays. PHYSICS LETTERS. SECTION B, 278(1-2), 209-216 [10.1016/0370-2693(92)90736-N].
Decamp, D; Deschizeaux, B; Goy, C; Lees, J; Minard, M; Alemany, R; Ariztizabal, F; Crespo, J; Delfino, M; Fernandez, E; Gaitan, V; Garrido, L; Mir, L; Pacheco, A; Pascual, A; Catanesi, M; Creanza, D; Depalma, M; Farilla, A; Iaselli, G; Maggi, G; Maggi, M; Natali, S; Nuzzo, S; Quattromini, M; Ranieri, A; Raso, G; Romano, F; Ruggieri, F; Selvaggi, G; Silvestris, L; Tempesta, P; Zito, G; Gao, Y; Hu, H; Huang, D; Huang, X; Lin, J; Lou, J; Qiao, C; Wang, T; Xie, Y; Xu, D; Xu, R; Zhang, J; Zhao, W; Atwood, W; Bauerdick, L; Bird, F; Blucher, E; Bonvicini, G; Bossi, F; Boudreau, J; Burnett, T; Drevermann, H; Forty, R; Grab, C; Hagelberg, R; Haywood, S; Hilgart, J; Jost, E; Kasemann, M; Knobloch, J; Lacourt, A; Lancon, E; Lehraus, I; Lohse, T; Lusiani, A; Martinez, M; Mato, P; Menary, S; Meyer, T; Minten, A; Miotto, A; Miquel, R; Moser, H; Nash, J; Palazzi, P; Perlas, J; Ranjard, F; Redlinger, G; Rolandi, L; Roth, A; Rothberg, J; Ruan, T; Saich, M; Schlatter, D; Schmelling, M; Tejessy, W; Wachsmuth, H; Wiedenmann, W; Witzeling, W; Wotschack, J; Ajaltouni, Z; Badaud, F; Bardadinotwinowska, M; Bencheikh, A; Elfellous, R; Falvard, A; Gay, P; Guicheney, C; Henrard, P; Jousset, J; Michel, B; Montret, J; Pallin, D; Perret, P; Pietrzyk, B; Proriol, J; Prulhiere, F; Stimpfl, G; Hansen, J; Hansen, J; Hansen, P; Mollerud, R; Nilsson, B; Efthymiopoulos, I; Simopoulou, E; Vayaki, A; Badier, J; Blondel, A; Bonneaud, G; Brient, J; Fouque, G; Gamess, A; Harvey, J; Orteu, S; Rosowsky, A; Rouge, A; Rumpf, M; Tanaka, R; Videau, H; Candlin, D; Parsons, M; Veitch, E; Moneta, L; Parrini, G; Corden, M; Georgiopoulos, C; Lkeda, M; Lannutti, J; Levinthal, D; Mermikides, M; Sawyer, L; Wasserbaech, S; Antonelli, A; Baldini, R; Bencivenni, G; Bologna, G; Campana, P; Capon, G; Cerutti, F; Chiarella, V; Dettorrepiazzoli, B; Felici, G; Laurelli, P; Mannocchi, G; Murtas, F; Murtas, G; Passalacqua, L; Pepealtarelli, M; Picchi, P; Zografou, P; Altoon, B; Boyle, O; Colrain, P; Halley, A; Tenhave, I; Lynch, J; Maitland, W; Morton, W; Raine, C; Scarr, J; Smith, K; Thompson, A; Turnbull, R; Brandl, B; Braun, O; Geiges, R; Geweniger, C; Hanke, P; Hepp, V; Kluge, E; Maumary, Y; Putzer, A; Rensch, B; Stahl, A; Tittel, K; Wunsch, M; Belk, A; Beuselinck, R; Binnie, D; Cameron, W; Cattaneo, M; Colling, D; Dornan, P; Dugeay, S; Greene, A; Hassard, J; Lieske, N; Patton, S; Payne, D; Phillips, M; Sedgbeer, J; Taylor, G; Tomalin, I; Wright, A; Girtler, P; Kuhn, D; Rudolph, G; Bowdery, C; Brodbeck, T; Finch, A; Foster, F; Hughes, G; Jackson, D; Keemer, N; Nuttall, M; Patel, A; Sloan, T; Snow, S; Whelan, E; Barczewski, T; Kleinknecht, K; Raab, J; Renk, B; Roehn, S; Sander, H; Schmidt, H; Steeg, F; Walther, S; Wolf, B; Aubert, J; Benchouk, C; Bernard, V; Bonissent, A; Carr, J; Coyle, P; Drinkard, J; Etienne, F; Papalexiou, S; Payre, P; Qian, Z; Rousseau, D; Schwernling, P; Talby, M; Adlung, S; Becker, H; Blum, W; Brown, D; Cattaneo, P; Cowan, G; Dehning, B; Dietl, H; Dydak, F; Fernandezbosman, M; Hanslkozanecka, T; Jahn, A; Lange, E; Lauber, J; Lutjens, G; Lutz, G; Manner, W; Pan, Y; Richter, R; Rotscheidt, H; Schroder, J; Schwarz, A; Settles, R; Stierlin, U; Stiegler, U; Stdenis, R; Takashima, M; Thomas, J; Wolf, G; Bertin, V; Boucrot, J; Callot, O; Chen, X; Cordier, A; Davier, M; Grivaz, J; Heusse, P; Janot, P; Kim, D; Lediberder, F; Lefrancois, J; Lutz, A; Schune, M; Veillet, J; Videau, I; Zhang, Z; Zomer, F; Abbaneo, D; Amendolia, S; Bagliesi, G; Batignani, G; Bosisio, L; Bottigli, U; Bradaschia, C; Carpinelli, M; Ciocci, M; Dellorso, R; Ferrante, I; Fidecaro, F; Foa, L; Focardi, E; Forti, F; Gatto, C; Giassi, A; Giorgi, M; Ligabue, F; Mannelli, E; Marrocchesi, P; Messineo, A; Palla, F; Sanguinetti, G; Steinberger, J; Tenchini, R; Tonelli, G; Triggiani, G; Vannini, C; Venturi, A; Verdini, P; Walsh, J; Carter, J; Green, M; March, P; Medcalf, T; Quazi, I; Strong, J; West, L; Wildish, T; Botterill, D; Clifft, R; Edgecock, T; Edwards, M; Fisher, S; Jones, T; Norton, P; Salmon, D; Thompson, J; Blochdevaux, B; Colas, P; Kozanecki, W; Locci, E; Loucatos, S; Monnier, E; Perez, P; Perrier, F; Rander, J; Renardy, J; Roussarie, A; Schuller, J; Schwindling, J; Vallage, B; Johnson, R; Litke, A; Wear, J; Ashman, J; Booth, C; Buttar, C; Carney, R; Cartwright, S; Combley, F; Dogru, M; Hatfield, F; Martin, J; Parker, D; Reeves, P; Thompson, L; Barberio, E; Brandt, S; Grupen, C; Meinhard, H; Mirabito, L; Schafer, U; Seywerd, H; Ganis, G; Giannini, G; Gobbo, B; Ragusa, F; Bellantoni, L; Cinabro, D; Conway, J; Cowen, D; Feng, Z; Ferguson, D; Gao, Y; Grahl, J; Harton, J; Jared, R; Leclaire, B; Lishka, C; Pan, Y; Pater, J; Saadi, Y; Sharma, V; Schmitt, M; Shi, Z; Tang, Y; Walsh, A; Weber, F; Whitney, M; Wu, S; Wu, X; Zobernig, G
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/390455
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