Observation of the semileptonic decays of BS and lambda-b hadrons at LEP

Buskulic, D.; Decamp, D.; Goy, C.; Lees, J.; Minard, M.; Mours, B.; Alemany, R.; Ariztizabal, F.; Comas, P.; Crespo, J.; Delfino, M.; Fernandez, E.; Gaitan, V.; Garrido, L.; Pacheco, A.; Pascual, A.; 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.; Blucher, E.; Bonvicini, G.; Bossi, F.; Boudreau, J.; Burnett, T.; Drevermann, H.; Forty, R.; Hagelberg, R.; Harvey, J.; Haywood, S.; Hilgart, J.; Jacobsen, R.; Jost, B.; Knobloch, J.; Lancon, E.; Lehraus, I.; Lohse, T.; Lusiani, A.; Martinez, M.; Mato, P.; Mattison, T.; Meinhard, H.; Menary, S.; Meyer, T.; Minten, 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.; Sefkow, F.; Tejessy, W.; Wachsmuth, H.; Wiedenmann, W.; Wildish, T.; 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.; Fearnley, T.; Hansen, J.; Hansen, J.; Hansen, P.; Mollerud, R.; Nilsson, B.; Efthymiopoulos, I.; Kyriakis, A.; Simopoulou, E.; Vayaki, A.; Zachariadou, K.; Badier, J.; Blondel, A.; Bonneaud, G.; Brient, J.; Fouque, G.; Gamess, A.; 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.; Ikeda, 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.; Altoon, B.; Boyle, O.; Colrain, P.; 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.; 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.; Schwemling, P.; Talby, M.; Adlung, S.; Bauer, C.; Blum, W.; Brown, D.; Cowan, G.; Dehning, B.; Dietl, H.; Dydak, F.; Fernandezbosman, M.; Frank, M.; Halley, A.; Lauber, J.; Lutjens, G.; Lutz, G.; Manner, W.; Richter, R.; Schroder, J.; Schwarz, A.; Settles, R.; Seywerd, H.; 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.; Giassi, A.; Giorgi, M.; Ligabue, F.; Mannelli, E.; Marrocchesi, P.; Messineo, A.; Palla, F.; Rizzo, G.; Sanguinetti, G.; Steinberger, J.; Tenchini, R.; Tonelli, G.; Triggiani, G.; Vannini, C.; Venturi, A.; Verdini, P.; Walsh, J.; Carter, J.; Green, M.; March, P.; Mir, L.; Medcalf, T.; Quazi, I.; Strong, J.; West, L.; Botterill, D.; Clifft, R.; Edgecock, T.; Edwards, M.; Fisher, S.; Jones, T.; Norton, P.; Salmon, D.; Thompson, J.; Blochdevaux, B.; Colas, P.; Kozanecki, W.; Lemaire, M.; Locci, E.; Loucatos, S.; Monnier, E.; Perez, P.; Perrier, F.; Rander, J.; Renardy, J.; Roussarie, A.; Schuller, J.; Schwindling, J.; Simohand, D.; Vallage, B.; Johnson, R.; Litke, A.; Taylor, G.; Wear, J.; Ashman, J.; Babbage, W.; Booth, C.; Buttar, C.; Carney, R.; Cartwright, S.; Combley, F.; Hatfield, F.; Reeves, P.; Thompson, L.; Barberio, E.; Brandt, S.; Grupen, C.; Mirabito, L.; Schafer, U.; 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.; Pusztaszeri, J.; Saadi, Y.; Sharma, V.; Schmitt, M.; Shi, Z.; Tang, Y.; Walsh, A.; Weber, F.; Whitney, M.; Wu, S.; Wu, X.; Zobernig, G.

doi:10.1016/0370-2693(92)91654-R

In 450000 hadronic Z decays recorded with the ALEPH detector at LEP, the yields of D(s)-l+ and LAMBDA(c)+l- combinations have been measured. 16.0 +/- 4.3 D(s)-l+ combinations were observed in the D(s)- --> phipi- channel and 17.0 +/- 4.5 combinations were observed in the D(s)- --> K*0K- channel. 21.0 +/- 5.0 LAMBDA(c)+l- combinations were observed, with the LAMBDA(c)+ reconstructed in the decay mode LAMBDA(c)+ --> pK-pi+. These events provide evidence for the decays B(s) --> D(s)-Xl+nu and LAMBDA(b) --> LAMBDA(c)+Xl-nuBAR. Assuming that the B(s) and LAMBDA(b) semileptonic decays are dominantly three-body, these observed yields, after background subtraction, translate into the following product branching ratios: Br(bBAR --> B(s))Br(B(s) --> D(s)-Xl+nu) = 0.040 +/- 0.011 +0.010/-0.012, Br(b --> LAMBDA(b))Br(LAMBDA(b) --> LAMBDA(c)+Xl-nuBAR) = 0.030 +/- 0.007 +/- 0.009.

Observation of the semileptonic decays of BS and lambda-b hadrons at LEP / D. Buskulic, D. Decamp, C. Goy, J. Lees, M. Minard, B. Mours, R. Alemany, F. Ariztizabal, P. Comas, J. Crespo, M. Delfino, E. Fernandez, V. Gaitan, L. Garrido, A. Pacheco, A. Pascual, D. Creanza, M. Depalma, A. Farilla, G. Iaselli, G. Maggi, M. Maggi, S. Natali, S. Nuzzo, M. Quattromini, A. Ranieri, G. Raso, F. Romano, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, G. Zito, Y. Gao, H. Hu, D. Huang, X. Huang, J. Lin, J. Lou, C. Qiao, T. Wang, Y. Xie, D. Xu, R. Xu, J. Zhang, W. Zhao, W. Atwood, L. Bauerdick, E. Blucher, G. Bonvicini, F. Bossi, J. Boudreau, T. Burnett, H. Drevermann, R. Forty, R. Hagelberg, J. Harvey, S. Haywood, J. Hilgart, R. Jacobsen, B. Jost, J. Knobloch, E. Lancon, I. Lehraus, T. Lohse, A. Lusiani, M. Martinez, P. Mato, T. Mattison, H. Meinhard, S. Menary, T. Meyer, A. Minten, R. Miquel, H. Moser, J. Nash, P. Palazzi, J. Perlas, F. Ranjard, G. Redlinger, L. Rolandi, A. Roth, J. Rothberg, T. Ruan, M. Saich, D. Schlatter, M. Schmelling, F. Sefkow, W. Tejessy, H. Wachsmuth, W. Wiedenmann, T. Wildish, W. Witzeling, J. Wotschack, Z. Ajaltouni, F. Badaud, M. Bardadinotwinowska, A. Bencheikh, R. Elfellous, A. Falvard, P. Gay, C. Guicheney, P. Henrard, J. Jousset, B. Michel, J. Montret, D. Pallin, P. Perret, B. Pietrzyk, J. Proriol, F. Prulhiere, G. Stimpfl, T. Fearnley, J. Hansen, J. Hansen, P. Hansen, R. Mollerud, B. Nilsson, I. Efthymiopoulos, A. Kyriakis, E. Simopoulou, A. Vayaki, K. Zachariadou, J. Badier, A. Blondel, G. Bonneaud, J. Brient, G. Fouque, A. Gamess, S. Orteu, A. Rosowsky, A. Rouge, M. Rumpf, R. Tanaka, H. Videau, D. Candlin, M. Parsons, E. Veitch, L. Moneta, G. Parrini, M. Corden, C. Georgiopoulos, M. Ikeda, J. Lannutti, D. Levinthal, M. Mermikides, L. Sawyer, S. Wasserbaech, A. Antonelli, R. Baldini, G. Bencivenni, G. Bologna, P. Campana, G. Capon, F. Cerutti, V. Chiarella, B. Dettorrepiazzoli, G. Felici, P. Laurelli, G. Mannocchi, F. Murtas, G. Murtas, L. Passalacqua, M. Pepealtarelli, P. Picchi, B. Altoon, O. Boyle, P. Colrain, I. Tenhave, J. Lynch, W. Maitland, W. Morton, C. Raine, J. Scarr, K. Smith, A. Thompson, R. Turnbull, B. Brandl, O. Braun, R. Geiges, C. Geweniger, P. Hanke, V. Hepp, E. Kluge, Y. Maumary, A. Putzer, B. Rensch, A. Stahl, K. Tittel, M. Wunsch, A. Belk, R. Beuselinck, D. Binnie, W. Cameron, M. Cattaneo, D. Colling, P. Dornan, S. Dugeay, A. Greene, J. Hassard, N. Lieske, S. Patton, D. Payne, M. Phillips, J. Sedgbeer, I. Tomalin, A. Wright, P. Girtler, D. Kuhn, G. Rudolph, C. Bowdery, T. Brodbeck, A. Finch, F. Foster, G. Hughes, D. Jackson, N. Keemer, M. Nuttall, A. Patel, T. Sloan, S. Snow, E. Whelan, T. Barczewski, K. Kleinknecht, J. Raab, B. Renk, S. Roehn, H. Sander, H. Schmidt, F. Steeg, S. Walther, B. Wolf, J. Aubert, C. Benchouk, V. Bernard, A. Bonissent, J. Carr, P. Coyle, J. Drinkard, F. Etienne, S. Papalexiou, P. Payre, Z. Qian, D. Rousseau, P. Schwemling, M. Talby, S. Adlung, C. Bauer, W. Blum, D. Brown, G. Cowan, B. Dehning, H. Dietl, F. Dydak, M. Fernandezbosman, M. Frank, A. Halley, J. Lauber, G. Lutjens, G. Lutz, W. Manner, R. Richter, J. Schroder, A. Schwarz, R. Settles, H. Seywerd, U. Stierlin, U. Stiegler, R. Stdenis, M. Takashima, J. Thomas, G. Wolf, V. Bertin, J. Boucrot, O. Callot, X. Chen, A. Cordier, M. Davier, J. Grivaz, P. Heusse, P. Janot, D. Kim, F. Lediberder, J. Lefrancois, A. Lutz, M. Schune, J. Veillet, I. Videau, Z. Zhang, F. Zomer, D. Abbaneo, S. Amendolia, G. Bagliesi, G. Batignani, L. Bosisio, U. Bottigli, C. Bradaschia, M. Carpinelli, M. Ciocci, R. Dellorso, I. Ferrante, F. Fidecaro, L. Foa, E. Focardi, F. Forti, A. Giassi, M. Giorgi, F. Ligabue, E. Mannelli, P. Marrocchesi, A. Messineo, F. Palla, G. Rizzo, G. Sanguinetti, J. Steinberger, R. Tenchini, G. Tonelli, G. Triggiani, C. Vannini, A. Venturi, P. Verdini, J. Walsh, J. Carter, M. Green, P. March, L. Mir, T. Medcalf, I. Quazi, J. Strong, L. West, D. Botterill, R. Clifft, T. Edgecock, M. Edwards, S. Fisher, T. Jones, P. Norton, D. Salmon, J. Thompson, B. Blochdevaux, P. Colas, W. Kozanecki, M. Lemaire, E. Locci, S. Loucatos, E. Monnier, P. Perez, F. Perrier, J. Rander, J. Renardy, A. Roussarie, J. Schuller, J. Schwindling, D. Simohand, B. Vallage, R. Johnson, A. Litke, G. Taylor, J. Wear, J. Ashman, W. Babbage, C. Booth, C. Buttar, R. Carney, S. Cartwright, F. Combley, F. Hatfield, P. Reeves, L. Thompson, E. Barberio, S. Brandt, C. Grupen, L. Mirabito, U. Schafer, G. Ganis, G. Giannini, B. Gobbo, F. Ragusa, L. Bellantoni, D. Cinabro, J. Conway, D. Cowen, Z. Feng, D. Ferguson, Y. Gao, J. Grahl, J. Harton, R. Jared, B. Leclaire, C. Lishka, Y. Pan, J. Pater, J. Pusztaszeri, Y. Saadi, V. Sharma, M. Schmitt, Z. Shi, Y. Tang, A. Walsh, F. Weber, M. Whitney, S. Wu, X. Wu, G. Zobernig. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 294:1(1992), pp. 145-156. [10.1016/0370-2693(92)91654-R]

Observation of the semileptonic decays of BS and lambda-b hadrons at LEP

D. Buskulic;D. Decamp;C. Goy;J. Lees;M. Minard;B. Mours;R. Alemany;F. Ariztizabal;P. Comas;J. Crespo;M. Delfino;E. Fernandez;V. Gaitan;L. Garrido;A. Pacheco;A. Pascual;D. Creanza;M. Depalma;A. Farilla;G. Iaselli;G. Maggi;M. Maggi;S. Natali;S. Nuzzo;M. Quattromini;A. Ranieri;G. Raso;F. Romano;F. Ruggieri;G. Selvaggi;L. Silvestris;P. Tempesta;G. Zito;Y. Gao;H. Hu;D. Huang;X. Huang;J. Lin;J. Lou;C. Qiao;T. Wang;Y. Xie;D. Xu;R. Xu;J. Zhang;W. Zhao;W. Atwood;L. Bauerdick;E. Blucher;G. Bonvicini;F. Bossi;J. Boudreau;T. Burnett;H. Drevermann;R. Forty;R. Hagelberg;J. Harvey;S. Haywood;J. Hilgart;R. Jacobsen;B. Jost;J. Knobloch;E. Lancon;I. Lehraus;T. Lohse;A. Lusiani;M. Martinez;P. Mato;T. Mattison;H. Meinhard;S. Menary;T. Meyer;A. Minten;R. Miquel;H. Moser;J. Nash;P. Palazzi;J. Perlas;F. Ranjard;G. Redlinger;L. Rolandi;A. Roth;J. Rothberg;T. Ruan;M. Saich;D. Schlatter;M. Schmelling;F. Sefkow;W. Tejessy;H. Wachsmuth;W. Wiedenmann;T. Wildish;W. Witzeling;J. Wotschack;Z. Ajaltouni;F. Badaud;M. Bardadinotwinowska;A. Bencheikh;R. Elfellous;A. Falvard;P. Gay;C. Guicheney;P. Henrard;J. Jousset;B. Michel;J. Montret;D. Pallin;P. Perret;B. Pietrzyk;J. Proriol;F. Prulhiere;G. Stimpfl;T. Fearnley;J. Hansen;J. Hansen;P. Hansen;R. Mollerud;B. Nilsson;I. Efthymiopoulos;A. Kyriakis;E. Simopoulou;A. Vayaki;K. Zachariadou;J. Badier;A. Blondel;G. Bonneaud;J. Brient;G. Fouque;A. Gamess;S. Orteu;A. Rosowsky;A. Rouge;M. Rumpf;R. Tanaka;H. Videau;D. Candlin;M. Parsons;E. Veitch;L. Moneta;G. Parrini;M. Corden;C. Georgiopoulos;M. Ikeda;J. Lannutti;D. Levinthal;M. Mermikides;L. Sawyer;S. Wasserbaech;A. Antonelli;R. Baldini;G. Bencivenni;G. Bologna;P. Campana;G. Capon;F. Cerutti;V. Chiarella;B. Dettorrepiazzoli;G. Felici;P. Laurelli;G. Mannocchi;F. Murtas;G. Murtas;L. Passalacqua;M. Pepealtarelli;P. Picchi;B. Altoon;O. Boyle;P. Colrain;I. Tenhave;J. Lynch;W. Maitland;W. Morton;C. Raine;J. Scarr;K. Smith;A. Thompson;R. Turnbull;B. Brandl;O. Braun;R. Geiges;C. Geweniger;P. Hanke;V. Hepp;E. Kluge;Y. Maumary;A. Putzer;B. Rensch;A. Stahl;K. Tittel;M. Wunsch;A. Belk;R. Beuselinck;D. Binnie;W. Cameron;M. Cattaneo;D. Colling;P. Dornan;S. Dugeay;A. Greene;J. Hassard;N. Lieske;S. Patton;D. Payne;M. Phillips;J. Sedgbeer;I. Tomalin;A. Wright;P. Girtler;D. Kuhn;G. Rudolph;C. Bowdery;T. Brodbeck;A. Finch;F. Foster;G. Hughes;D. Jackson;N. Keemer;M. Nuttall;A. Patel;T. Sloan;S. Snow;E. Whelan;T. Barczewski;K. Kleinknecht;J. Raab;B. Renk;S. Roehn;H. Sander;H. Schmidt;F. Steeg;S. Walther;B. Wolf;J. Aubert;C. Benchouk;V. Bernard;A. Bonissent;J. Carr;P. Coyle;J. Drinkard;F. Etienne;S. Papalexiou;P. Payre;Z. Qian;D. Rousseau;P. Schwemling;M. Talby;S. Adlung;C. Bauer;W. Blum;D. Brown;G. Cowan;B. Dehning;H. Dietl;F. Dydak;M. Fernandezbosman;M. Frank;A. Halley;J. Lauber;G. Lutjens;G. Lutz;W. Manner;R. Richter;J. Schroder;A. Schwarz;R. Settles;H. Seywerd;U. Stierlin;U. Stiegler;R. Stdenis;M. Takashima;J. Thomas;G. Wolf;V. Bertin;J. Boucrot;O. Callot;X. Chen;A. Cordier;M. Davier;J. Grivaz;P. Heusse;P. Janot;D. Kim;F. Lediberder;J. Lefrancois;A. Lutz;M. Schune;J. Veillet;I. Videau;Z. Zhang;F. Zomer;D. Abbaneo;S. Amendolia;G. Bagliesi;G. Batignani;L. Bosisio;U. Bottigli;C. Bradaschia;M. Carpinelli;M. Ciocci;R. Dellorso;I. Ferrante;F. Fidecaro;L. Foa;E. Focardi;F. Forti;A. Giassi;M. Giorgi;F. Ligabue;E. Mannelli;P. Marrocchesi;A. Messineo;F. Palla;G. Rizzo;G. Sanguinetti;J. Steinberger;R. Tenchini;G. Tonelli;G. Triggiani;C. Vannini;A. Venturi;P. Verdini;J. Walsh;J. Carter;M. Green;P. March;L. Mir;T. Medcalf;I. Quazi;J. Strong;L. West;D. Botterill;R. Clifft;T. Edgecock;M. Edwards;S. Fisher;T. Jones;P. Norton;D. Salmon;J. Thompson;B. Blochdevaux;P. Colas;W. Kozanecki;M. Lemaire;E. Locci;S. Loucatos;E. Monnier;P. Perez;F. Perrier;J. Rander;J. Renardy;A. Roussarie;J. Schuller;J. Schwindling;D. Simohand;B. Vallage;R. Johnson;A. Litke;G. Taylor;J. Wear;J. Ashman;W. Babbage;C. Booth;C. Buttar;R. Carney;S. Cartwright;F. Combley;F. Hatfield;P. Reeves;L. Thompson;E. Barberio;S. Brandt;C. Grupen;L. Mirabito;U. Schafer;G. Ganis;G. Giannini;B. Gobbo;F. Ragusa;L. Bellantoni;D. Cinabro;J. Conway;D. Cowen;Z. Feng;D. Ferguson;Y. Gao;J. Grahl;J. Harton;R. Jared;B. Leclaire;C. Lishka;Y. Pan;J. Pater;J. Pusztaszeri;Y. Saadi;V. Sharma;M. Schmitt;Z. Shi;Y. Tang;A. Walsh;F. Weber;M. Whitney;S. Wu;X. Wu;G. Zobernig

1992

Abstract

In 450000 hadronic Z decays recorded with the ALEPH detector at LEP, the yields of D(s)-l+ and LAMBDA(c)+l- combinations have been measured. 16.0 +/- 4.3 D(s)-l+ combinations were observed in the D(s)- --> phipi- channel and 17.0 +/- 4.5 combinations were observed in the D(s)- --> K*0K- channel. 21.0 +/- 5.0 LAMBDA(c)+l- combinations were observed, with the LAMBDA(c)+ reconstructed in the decay mode LAMBDA(c)+ --> pK-pi+. These events provide evidence for the decays B(s) --> D(s)-Xl+nu and LAMBDA(b) --> LAMBDA(c)+Xl-nuBAR. Assuming that the B(s) and LAMBDA(b) semileptonic decays are dominantly three-body, these observed yields, after background subtraction, translate into the following product branching ratios: Br(bBAR --> B(s))Br(B(s) --> D(s)-Xl+nu) = 0.040 +/- 0.011 +0.010/-0.012, Br(b --> LAMBDA(b))Br(LAMBDA(b) --> LAMBDA(c)+Xl-nuBAR) = 0.030 +/- 0.007 +/- 0.009.

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	Settori scientifico-disciplinari dell'articolo
	
			Settore FIS/01 - Fisica Sperimentale
Settore FIS/04 - Fisica Nucleare e Subnucleare
		
	Data di pubblicazione
	
			1992
		
	Rivista in ANCE
	
			PHYSICS LETTERS. SECTION B
		
	DOI
	
			https://dx.doi.org/10.1016/0370-2693(92)91654-R
		
	Tipologia
	
			Article (author)
		
	Appare nelle tipologie:
	
			01 - Articolo su periodico

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