Using about 1.5 million hadronic Z decays recorded with the ALEPH detector, the lifetime of the b baryons has been measured using two independent data samples. From a maximum likelihood fit to the impact parameter distribution of leptons in 519 Lambda l(-) combinations containing a b baryon sample of 290 decays, the measured b baryon lifetime is tau(b-baryon) = 1.05(-0.11)(+0.12)(stat) +/-0.09(syst) ps. The lifetime of the Lambda(b)(0) baryon from a maximum likelihood fit to the proper time distribution of 58 Lambda(c)(+)l(-) candidates containing a Lambda(b)(0) sample of 44 decays, is tau(Lambda b0) = 1.02(-0.18)(+0.23)(stat) +/- 0.06(syst) ps.

Measurements of the b baryon lifetime / Buskulic, D; Casper, D; Debonis, I; Decamp, D; Ghez, P; Goy, C; Lees, Jp; Minard, Mn; Odier, P; Pietrzyk, B; Ariztizabal, F; Chmeissani, M; Crespo, Jm; Efthymiopoulos, I; Fernandez, E; Fernandezbosman, M; Gaitan, V; Garrido, L; Martinez, M; Orteu, S; Pacheco, A; Padilla, C; Palla, F; Pascual, A; Perlas, Ja; Sanchez, F; Teubert, F; Colaleo, A; Creanza, Donato Maria; Depalma, M; Farilla, A; Gelao, Gennaro; Girone, M; Iaselli, Giuseppe; Maggi, Giorgio Pietro; Marinelli, N; Natali, S; Nuzzo, S; Ranieri, A; Raso, G; Romano, F; Ruggieri, F; Selvaggi, G; Silvestris, L; Tempesta, P; Zito, G; Huang, X; Lin, J; Ouyang, Q; Wang, T; Xie, Y; Xu, R; Xue, S; Zhang, J; Zhang, L; Zhao, W; Bonvicini, G; Cassel, D; Cattaneo, M; Comas, P; Coyle, P; Drevermann, H; Engelhardt, A; Forty, Rw; Frank, M; Hagelberg, R; Harvey, J; Jacobsen, R; Janot, P; Jost, B; Knobloch, J; Lehraus, I; Maggi, M; Markou, C; Martin, Eb; Mato, P; Meinhard, H; Minten, A; Miquel, R; Oest, T; Palazzi, P; Pater, Jr; Pusztaszeri, Jf; Ranjard, F; Rensing, P; Rolandi, L; Schlatter, D; Schmelling, M; Schneider, O; Tejessy, W; Tomalin, Ir; Venturi, A; Wachsmuth, H; Wiedenmann, W; Wildish, T; Witzeling, W; Wotschack, J; Ajaltouni, Z; Bardadinotwinowska, M; Barres, A; Boyer, C; Falvard, A; Gay, P; Guicheney, C; Henrard, P; Jousset, J; Michel, B; Monteil, S; Montret, Jc; Pallin, D; Perret, P; Podlyski, F; Proriol, J; Rossignol, Jm; Saadi, F; Fearnley, T; Hansen, Jb; Hansen, Jd; Hansen, Jr; Hansen, Ph; Nilsson, Bs; Kyriakis, A; Simopoulou, E; Siotis, I; Vayaki, A; Zachariadou, K; Blondel, A; Bonneaud, G; Brient, Jc; Bourdon, P; Passalacqua, L; Rouge, A; Rumpf, M; Tanaka, R; Valassi, A; Verderi, M; Videau, H; Candlin, Dj; Parsons, Mi; Focardi, E; Parrini, G; Corden, M; Delfino, M; Georgiopoulos, C; Jaffe, De; Antonelli, A; Bencivenni, G; Bologna, G; Bossi, F; Campana, P; Capon, G; Chiarella, V; Felici, G; Laurelli, P; Mannocchi, G; Murtas, F; Murtas, Gp; Pepealtarelli, M; Dorris, Sj; Halley, Aw; Tenhave, I; Knowles, Ig; Lynch, Jg; Morton, Wt; Oshea, V; Raine, C; Reeves, P; Scarr, Jm; Smith, K; Smith, Mg; Thompson, As; Thomson, F; Thorn, S; Turnbull, Rm; Becker, U; Braun, O; Geweniger, C; Graefe, G; Hanke, P; Hepp, V; Kluge, Ee; Putzer, A; Rensch, B; Schmidt, M; Sommer, J; Stenzel, H; Tittel, K; Werner, S; Wunsch, M; Beuselinck, R; Binnie, Dm; Cameron, W; Colling, Dj; Dorman, Pj; Konstantinidis, N; Moneta, L; Moutoussi, A; Nash, J; Sanmartin, G; Sedgbeer, Jk; Stacey, Am; Dissertori, G; Girtler, P; Kneringer, E; Kuhn, D; Rudolph, G; Bowdery, Ck; Brodbeck, Tj; Colrain, P; Crawford, G; Finch, Aj; Foster, F; Hughes, G; Sloan, T; Whelan, Ep; Williams, Mi; Galla, A; Greene, Am; Kleinknecht, K; Quast, G; Raab, J; Renk, B; Sander, Hg; Wanke, R; Zeitnitz, C; Aubert, Jj; Bencheikh, Am; Benchouk, C; Bonissent, A; Bujosa, G; Calvet, D; Carr, J; Diaconu, C; Etienne, F; Thulasidas, M; Nicod, D; Payre, P; Rousseau, D; Talby, M; Abt, L; Assmann, R; Bauer, C; Blum, W; Brown, D; Dietl, H; Dydak, F; Ganis, G; Gotzhein, C; Jakobs, K; Kroha, H; Lutjens, G; Lutz, G; Manner, W; Moser, Hg; Richter, R; Rosadoschlosser, A; Settles, R; Seywerd, H; Stierlin, U; Stdenis, R; Wolf, G; Alemany, R; Boucrot, J; Callot, O; Cordier, A; Courault, F; Davier, M; Duflot, L; Grivaz, Jf; Heusse, P; Jacquet, M; Kim, Dw; Lediberder, F; Lefrancois, J; Lutz, Am; Musolino, G; Nikolic, I; Park, Hj; Park, Ic; Schune, Mh; Simion, S; Veillet, Jj; Videau, I; Abbaneo, D; Azzurri, P; Bagliesi, G; Batignani, G; Bettarini, S; Bozzi, C; Calderini, G; Carpinelli, M; Ciocci, Ma; Ciulli, V; Dellorso, R; Fantechi, R; Ferrante, I; Foa, L; Forti, F; Gambino, D; Giassi, A; Giorgi, Ma; Gregorio, A; Ligabue, F; Lusiani, A; Marrocchesi, Ps; Messineo, A; Rizzo, G; Sanguinetti, G; Sciaba, A; Spagnolo, P; Steinberger, J; Tenchini, R; Tonelli, G; Triggiani, G; Vannini, C; Verdini, Pg; Walsh, J; Betteridge, Ap; Blair, Ga; Bryant, Lm; Cerutti, F; Gao, Y; Green, Mg; Johnson, Dl; Medcalf, T; Mir, Lm; Perrodo, P; Strong, Ja; Bertin, V; Botterill, Dr; Clifft, Rw; Edgecock, Tr; Haywood, S; Edwards, M; Maley, P; Norton, Pr; Thompson, Jc; Blochdevaux, B; Colas, P; Duarte, H; Emery, S; Kozanecki, W; Lancon, E; Lemaire, Mc; Locci, E; Marx, B; Perez, P; Rander, J; Renardy, Jf; Rosowsky, A; Roussarie, A; Schuller, Jp; Schwindling, J; Simohand, D; Trabelsi, A; Vallage, B; Johnson, Rp; Kim, Hy; Litke, Am; Mcneil, Ma; Taylor, G; Beddall, A; Booth, Cn; Boswell, R; Cartwright, S; Combley, F; Dawson, I; Koksal, A; Letho, M; Newton, Wm; Rankin, C; Thomspon, Lf; Bohrer, A; Brandt, S; Cowan, G; Feigl, E; Grupen, C; Lutters, G; Minguetrodriguez, J; Rivera, F; Saraiva, P; Smolik, L; Stephan, F; Apollonio, M; Bosisio, L; Dellamarina, R; Giannini, G; Gobbo, B; Ragusa, F; Rothberg, J; Wasserbaech, S; Armstrong, Sr; Bellantoni, L; Elmer, P; Feng, Z; Ferguson, Dps; Gao, Ys; Gonzalez, S; Grahl, J; Harton, Jl; Hayes, Oj; H, Hu; Mcnamara, Pa; Nachtman, Jm; Orejudos, W; Pan, Yb; Saadi, Y; Schmitt, M; Scott, Ij; Sharma, V; Turk, Jd; Walsh, Am; Wu, Sl; Wu, X; Yamartino, Jm; Zheng, M; Zobernig, G.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 357:4(1995), pp. 685-698. [10.1016/0370-2693(95)00980-Y]

Measurements of the b baryon lifetime

CREANZA, Donato Maria;GELAO, Gennaro;IASELLI, Giuseppe;MAGGI, Giorgio Pietro;
1995-01-01

Abstract

Using about 1.5 million hadronic Z decays recorded with the ALEPH detector, the lifetime of the b baryons has been measured using two independent data samples. From a maximum likelihood fit to the impact parameter distribution of leptons in 519 Lambda l(-) combinations containing a b baryon sample of 290 decays, the measured b baryon lifetime is tau(b-baryon) = 1.05(-0.11)(+0.12)(stat) +/-0.09(syst) ps. The lifetime of the Lambda(b)(0) baryon from a maximum likelihood fit to the proper time distribution of 58 Lambda(c)(+)l(-) candidates containing a Lambda(b)(0) sample of 44 decays, is tau(Lambda b0) = 1.02(-0.18)(+0.23)(stat) +/- 0.06(syst) ps.
1995
Measurements of the b baryon lifetime / Buskulic, D; Casper, D; Debonis, I; Decamp, D; Ghez, P; Goy, C; Lees, Jp; Minard, Mn; Odier, P; Pietrzyk, B; Ariztizabal, F; Chmeissani, M; Crespo, Jm; Efthymiopoulos, I; Fernandez, E; Fernandezbosman, M; Gaitan, V; Garrido, L; Martinez, M; Orteu, S; Pacheco, A; Padilla, C; Palla, F; Pascual, A; Perlas, Ja; Sanchez, F; Teubert, F; Colaleo, A; Creanza, Donato Maria; Depalma, M; Farilla, A; Gelao, Gennaro; Girone, M; Iaselli, Giuseppe; Maggi, Giorgio Pietro; Marinelli, N; Natali, S; Nuzzo, S; Ranieri, A; Raso, G; Romano, F; Ruggieri, F; Selvaggi, G; Silvestris, L; Tempesta, P; Zito, G; Huang, X; Lin, J; Ouyang, Q; Wang, T; Xie, Y; Xu, R; Xue, S; Zhang, J; Zhang, L; Zhao, W; Bonvicini, G; Cassel, D; Cattaneo, M; Comas, P; Coyle, P; Drevermann, H; Engelhardt, A; Forty, Rw; Frank, M; Hagelberg, R; Harvey, J; Jacobsen, R; Janot, P; Jost, B; Knobloch, J; Lehraus, I; Maggi, M; Markou, C; Martin, Eb; Mato, P; Meinhard, H; Minten, A; Miquel, R; Oest, T; Palazzi, P; Pater, Jr; Pusztaszeri, Jf; Ranjard, F; Rensing, P; Rolandi, L; Schlatter, D; Schmelling, M; Schneider, O; Tejessy, W; Tomalin, Ir; Venturi, A; Wachsmuth, H; Wiedenmann, W; Wildish, T; Witzeling, W; Wotschack, J; Ajaltouni, Z; Bardadinotwinowska, M; Barres, A; Boyer, C; Falvard, A; Gay, P; Guicheney, C; Henrard, P; Jousset, J; Michel, B; Monteil, S; Montret, Jc; Pallin, D; Perret, P; Podlyski, F; Proriol, J; Rossignol, Jm; Saadi, F; Fearnley, T; Hansen, Jb; Hansen, Jd; Hansen, Jr; Hansen, Ph; Nilsson, Bs; Kyriakis, A; Simopoulou, E; Siotis, I; Vayaki, A; Zachariadou, K; Blondel, A; Bonneaud, G; Brient, Jc; Bourdon, P; Passalacqua, L; Rouge, A; Rumpf, M; Tanaka, R; Valassi, A; Verderi, M; Videau, H; Candlin, Dj; Parsons, Mi; Focardi, E; Parrini, G; Corden, M; Delfino, M; Georgiopoulos, C; Jaffe, De; Antonelli, A; Bencivenni, G; Bologna, G; Bossi, F; Campana, P; Capon, G; Chiarella, V; Felici, G; Laurelli, P; Mannocchi, G; Murtas, F; Murtas, Gp; Pepealtarelli, M; Dorris, Sj; Halley, Aw; Tenhave, I; Knowles, Ig; Lynch, Jg; Morton, Wt; Oshea, V; Raine, C; Reeves, P; Scarr, Jm; Smith, K; Smith, Mg; Thompson, As; Thomson, F; Thorn, S; Turnbull, Rm; Becker, U; Braun, O; Geweniger, C; Graefe, G; Hanke, P; Hepp, V; Kluge, Ee; Putzer, A; Rensch, B; Schmidt, M; Sommer, J; Stenzel, H; Tittel, K; Werner, S; Wunsch, M; Beuselinck, R; Binnie, Dm; Cameron, W; Colling, Dj; Dorman, Pj; Konstantinidis, N; Moneta, L; Moutoussi, A; Nash, J; Sanmartin, G; Sedgbeer, Jk; Stacey, Am; Dissertori, G; Girtler, P; Kneringer, E; Kuhn, D; Rudolph, G; Bowdery, Ck; Brodbeck, Tj; Colrain, P; Crawford, G; Finch, Aj; Foster, F; Hughes, G; Sloan, T; Whelan, Ep; Williams, Mi; Galla, A; Greene, Am; Kleinknecht, K; Quast, G; Raab, J; Renk, B; Sander, Hg; Wanke, R; Zeitnitz, C; Aubert, Jj; Bencheikh, Am; Benchouk, C; Bonissent, A; Bujosa, G; Calvet, D; Carr, J; Diaconu, C; Etienne, F; Thulasidas, M; Nicod, D; Payre, P; Rousseau, D; Talby, M; Abt, L; Assmann, R; Bauer, C; Blum, W; Brown, D; Dietl, H; Dydak, F; Ganis, G; Gotzhein, C; Jakobs, K; Kroha, H; Lutjens, G; Lutz, G; Manner, W; Moser, Hg; Richter, R; Rosadoschlosser, A; Settles, R; Seywerd, H; Stierlin, U; Stdenis, R; Wolf, G; Alemany, R; Boucrot, J; Callot, O; Cordier, A; Courault, F; Davier, M; Duflot, L; Grivaz, Jf; Heusse, P; Jacquet, M; Kim, Dw; Lediberder, F; Lefrancois, J; Lutz, Am; Musolino, G; Nikolic, I; Park, Hj; Park, Ic; Schune, Mh; Simion, S; Veillet, Jj; Videau, I; Abbaneo, D; Azzurri, P; Bagliesi, G; Batignani, G; Bettarini, S; Bozzi, C; Calderini, G; Carpinelli, M; Ciocci, Ma; Ciulli, V; Dellorso, R; Fantechi, R; Ferrante, I; Foa, L; Forti, F; Gambino, D; Giassi, A; Giorgi, Ma; Gregorio, A; Ligabue, F; Lusiani, A; Marrocchesi, Ps; Messineo, A; Rizzo, G; Sanguinetti, G; Sciaba, A; Spagnolo, P; Steinberger, J; Tenchini, R; Tonelli, G; Triggiani, G; Vannini, C; Verdini, Pg; Walsh, J; Betteridge, Ap; Blair, Ga; Bryant, Lm; Cerutti, F; Gao, Y; Green, Mg; Johnson, Dl; Medcalf, T; Mir, Lm; Perrodo, P; Strong, Ja; Bertin, V; Botterill, Dr; Clifft, Rw; Edgecock, Tr; Haywood, S; Edwards, M; Maley, P; Norton, Pr; Thompson, Jc; Blochdevaux, B; Colas, P; Duarte, H; Emery, S; Kozanecki, W; Lancon, E; Lemaire, Mc; Locci, E; Marx, B; Perez, P; Rander, J; Renardy, Jf; Rosowsky, A; Roussarie, A; Schuller, Jp; Schwindling, J; Simohand, D; Trabelsi, A; Vallage, B; Johnson, Rp; Kim, Hy; Litke, Am; Mcneil, Ma; Taylor, G; Beddall, A; Booth, Cn; Boswell, R; Cartwright, S; Combley, F; Dawson, I; Koksal, A; Letho, M; Newton, Wm; Rankin, C; Thomspon, Lf; Bohrer, A; Brandt, S; Cowan, G; Feigl, E; Grupen, C; Lutters, G; Minguetrodriguez, J; Rivera, F; Saraiva, P; Smolik, L; Stephan, F; Apollonio, M; Bosisio, L; Dellamarina, R; Giannini, G; Gobbo, B; Ragusa, F; Rothberg, J; Wasserbaech, S; Armstrong, Sr; Bellantoni, L; Elmer, P; Feng, Z; Ferguson, Dps; Gao, Ys; Gonzalez, S; Grahl, J; Harton, Jl; Hayes, Oj; H, Hu; Mcnamara, Pa; Nachtman, Jm; Orejudos, W; Pan, Yb; Saadi, Y; Schmitt, M; Scott, Ij; Sharma, V; Turk, Jd; Walsh, Am; Wu, Sl; Wu, X; Yamartino, Jm; Zheng, M; Zobernig, G.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 357:4(1995), pp. 685-698. [10.1016/0370-2693(95)00980-Y]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/1421
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