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Strange b baryon production and lifetime in Z decays

In a data sample of approximately four million hadronic Z decays recorded with the ALEPH detector from 1990 to 1995, a search for the strange b baryon Xi_b is performed with a study of Xi-lepton correlations. Forty-four events with same sign Xi- l- combinations are found whereas 8.4 are expected bas...

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Detalles Bibliográficos
Autores principales:	Buskulic, Damir, De Bonis, I, Décamp, D, Ghez, P, Goy, C, Lees, J P, Lucotte, A, Minard, M N, Nief, J Y, Odier, P, Pietrzyk, B, Casado, M P, Chmeissani, M, Crespo, J M, Delfino, M C, Efthymiopoulos, I, Fernández, E, Fernández-Bosman, M, Garrido, L, Juste, A, Martínez, M, Orteu, S, Padilla, C, Park, I C, Pascual, A, Perlas, J A, Riu, I, Sánchez, F, Teubert, F, Colaleo, A, Creanza, D, De Palma, M, Gelao, G, Girone, M, Iaselli, Giuseppe, Maggi, G, Maggi, M, Marinelli, N, Nuzzo, S, Ranieri, A, Raso, G, 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, Alemany, R, Bazarko, A O, Bonvicini, G, Cattaneo, M, Comas, P, Coyle, P, Drevermann, H, Forty, Roger W, Frank, M, Hagelberg, R, Harvey, J, Janot, P, Jost, B, Kneringer, E, Knobloch, J, Lehraus, Ivan, Lutters, G, Martin, E B, Mato, P, Minten, Adolf G, Miquel, R, Mir, L M, Moneta, L, Oest, T, Pacheco, A, Pusztaszeri, J F, Ranjard, F, Rensing, P E, Rolandi, Luigi, Schlatter, W D, Schmelling, M, Schmitt, M, Schneider, O, Tejessy, W, Tomalin, I R, Venturi, A, Wachsmuth, H W, Wagner, A, Ajaltouni, Ziad J, Barrès, A, Boyer, C, Falvard, A, Gay, P, Guicheney, C, Henrard, P, Jousset, J, Michel, B, Monteil, S, Montret, J C, Pallin, D, Perret, P, Podlyski, F, Proriol, J, Rosnet, P, Rossignol, J M, Fearnley, Tom, Hansen, J B, Hansen, J D, Hansen, J R, Hansen, P H, Nilsson, B S, Rensch, B, Wäänänen, A, Kyriakis, A, Markou, C, Simopoulou, Errietta, Siotis, I, Vayaki, Anna, Zachariadou, K, Blondel, A, Bonneaud, G R, Brient, J C, Bourdon, P, Rougé, A, Rumpf, M, Valassi, Andrea, Verderi, M, Videau, H L, Candlin, D J, Parsons, M I, Focardi, E, Parrini, G, Corden, M, Georgiopoulos, C H, Jaffe, D E, Antonelli, A, Bencivenni, G, Bologna, G, Bossi, F, Campana, P, Capon, G, Casper, David William, Chiarella, V, Felici, G, Laurelli, P, Mannocchi, G, Murtas, F, Murtas, G P, Passalacqua, L, Pepé-Altarelli, M, Curtis, L, Dorris, S J, Halley, A W, Knowles, I G, Lynch, J G, O'Shea, V, Raine, C, Reeves, P, Scarr, J M, Smith, K, Teixeira-Dias, P, Thompson, A S, Thomson, F, Thorn, S, Turnbull, R M, Becker, U, Geweniger, C, Graefe, G, Hanke, P, Hansper, G, Hepp, V, Kluge, E E, Putzer, A, Schmidt, M, Sommer, J, Stenzel, H, Tittel, K, Werner, S, Wunsch, M, Abbaneo, D, Beuselinck, R, Binnie, David M, Cameron, W, Dornan, Peter J, Moutoussi, A, Nash, J, Sedgbeer, J K, Stacey, A M, Williams, M D, Dissertori, G, Girtler, P, Kuhn, D, Rudolph, G, Betteridge, A P, Bowdery, C K, Colrain, P, Crawford, G, Finch, A J, Foster, F, Hughes, G, Sloan, Terence, Williams, M I, Galla, A, Giehl, I, Greene, A M, Kleinknecht, K, Quast, G, Renk, B, Rohne, E, Sander, H G, Van Gemmeren, P, Zeitnitz, C, Aubert, Jean-Jacques, Bencheikh, A M, Benchouk, C, Bonissent, A, Bujosa, G, Calvet, D, Carr, J, Diaconu, C A, Etienne, F, Konstantinidis, N P, Payre, P, Rousseau, D, Talby, M, Sadouki, A, Thulasidas, M, Trabelsi, K, Aleppo, M, Ragusa, F, Abt, I, Assmann, R W, Bauer, C, Blum, Walter, Dietl, H, Dydak, Friedrich, Ganis, G, Gotzhein, C, Jakobs, K, Kroha, H, Lütjens, G, Lutz, Gerhard, Männer, W, Moser, H G, Richter, R H, Rosado-Schlosser, A, Schael, S, Settles, Ronald, Seywerd, H C J, Saint-Denis, R, Wiedenmann, W, Wolf, G, Boucrot, J, Callot, O, Choi, Y, Cordier, A, Davier, M, Duflot, L, Grivaz, J F, Heusse, P, Höcker, A, Jacholkowska, A, Jacquet, M, Kim, D W, Le Diberder, F R, Lefrançois, J, Lutz, A M, Nikolic, I A, Park, H J, Schune, M H, Simion, S, Veillet, J J, Videau, I, Zerwas, D, Azzurri, P, Bagliesi, G, Batignani, G, Bettarini, S, Bozzi, C, Calderini, G, Carpinelli, M, Ciocci, M A, Ciulli, V, Dell'Orso, R, Fantechi, R, Ferrante, I, Foà, L, Forti, F, Giassi, A, Giorgi, M A, Gregorio, A, Ligabue, F, Lusiani, A, Marrocchesi, P S, Messineo, A, Palla, Fabrizio, Rizzo, G, Sanguinetti, G, Sciabà, A, Spagnolo, P, Steinberger, Jack, Tenchini, Roberto, Tonelli, G, Vannini, C, Verdini, P G, Walsh, J, Blair, G A, Bryant, L M, Cerutti, F, Chambers, J T, Gao, Y, Green, M G, Medcalf, T, Perrodo, P, Strong, J A, Von Wimmersperg-Töller, J H, Botterill, David R, Clifft, R W, Edgecock, T R, Haywood, S, Maley, P, Norton, P R, Thompson, J C, Wright, A E, Bloch-Devaux, B, Colas, P, Emery, S, Kozanecki, Witold, Lançon, E, Lemaire, M C, Locci, E, Marx, B, Pérez, P, Rander, J, Renardy, J F, Roussarie, A, Schuller, J P, Schwindling, J, Trabelsi, A, Vallage, B, Black, S N, Dann, J H, Johnson, R P, Kim, H Y, Litke, A M, McNeil, M A, Taylor, G, Booth, C N, Boswell, R, Brew, C A J, Cartwright, S L, Combley, F, Köksal, A, Lehto, M H, Newton, W M, Reeve, J, Thompson, L F, Böhrer, A, Brandt, S, Büscher, V, Cowan, G D, Grupen, Claus, Minguet-Rodríguez, J A, Rivera, F, Saraiva, P, Smolik, L, Stephan, F, Apollonio, M, Bosisio, L, Della Marina, R, Giannini, G, Gobbo, B, Musolino, G, Rothberg, J E, Wasserbaech, S R, Armstrong, S R, Elmer, P, Feng, Z, Ferguson, D P S, Gao, Y S, González, S, Grahl, J, Greening, T C, Hayes, O J, Hu, H, McNamara, P A, Nachtman, J M, Orejudos, W, Pan, Y B, Saadi, Y, Scott, I J, Walsh, A M, Wu Sau Lan, Wu, X, Yamartino, J M, Zheng, M, Zobernig, G
Lenguaje:	eng
Publicado:	1996
Materias:	Particle Physics - Experiment
Acceso en línea:	https://dx.doi.org/10.1016/0370-2693(96)00925-2 http://cds.cern.ch/record/306603

_version_	1780889846988931072
author	Buskulic, Damir De Bonis, I Décamp, D Ghez, P Goy, C Lees, J P Lucotte, A Minard, M N Nief, J Y Odier, P Pietrzyk, B Casado, M P Chmeissani, M Crespo, J M Delfino, M C Efthymiopoulos, I Fernández, E Fernández-Bosman, M Garrido, L Juste, A Martínez, M Orteu, S Padilla, C Park, I C Pascual, A Perlas, J A Riu, I Sánchez, F Teubert, F Colaleo, A Creanza, D De Palma, M Gelao, G Girone, M Iaselli, Giuseppe Maggi, G Maggi, M Marinelli, N Nuzzo, S Ranieri, A Raso, G 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 Alemany, R Bazarko, A O Bonvicini, G Cattaneo, M Comas, P Coyle, P Drevermann, H Forty, Roger W Frank, M Hagelberg, R Harvey, J Janot, P Jost, B Kneringer, E Knobloch, J Lehraus, Ivan Lutters, G Martin, E B Mato, P Minten, Adolf G Miquel, R Mir, L M Moneta, L Oest, T Pacheco, A Pusztaszeri, J F Ranjard, F Rensing, P E Rolandi, Luigi Schlatter, W D Schmelling, M Schmitt, M Schneider, O Tejessy, W Tomalin, I R Venturi, A Wachsmuth, H W Wagner, A Ajaltouni, Ziad J Barrès, A Boyer, C Falvard, A Gay, P Guicheney, C Henrard, P Jousset, J Michel, B Monteil, S Montret, J C Pallin, D Perret, P Podlyski, F Proriol, J Rosnet, P Rossignol, J M Fearnley, Tom Hansen, J B Hansen, J D Hansen, J R Hansen, P H Nilsson, B S Rensch, B Wäänänen, A Kyriakis, A Markou, C Simopoulou, Errietta Siotis, I Vayaki, Anna Zachariadou, K Blondel, A Bonneaud, G R Brient, J C Bourdon, P Rougé, A Rumpf, M Valassi, Andrea Verderi, M Videau, H L Candlin, D J Parsons, M I Focardi, E Parrini, G Corden, M Georgiopoulos, C H Jaffe, D E Antonelli, A Bencivenni, G Bologna, G Bossi, F Campana, P Capon, G Casper, David William Chiarella, V Felici, G Laurelli, P Mannocchi, G Murtas, F Murtas, G P Passalacqua, L Pepé-Altarelli, M Curtis, L Dorris, S J Halley, A W Knowles, I G Lynch, J G O'Shea, V Raine, C Reeves, P Scarr, J M Smith, K Teixeira-Dias, P Thompson, A S Thomson, F Thorn, S Turnbull, R M Becker, U Geweniger, C Graefe, G Hanke, P Hansper, G Hepp, V Kluge, E E Putzer, A Schmidt, M Sommer, J Stenzel, H Tittel, K Werner, S Wunsch, M Abbaneo, D Beuselinck, R Binnie, David M Cameron, W Dornan, Peter J Moutoussi, A Nash, J Sedgbeer, J K Stacey, A M Williams, M D Dissertori, G Girtler, P Kuhn, D Rudolph, G Betteridge, A P Bowdery, C K Colrain, P Crawford, G Finch, A J Foster, F Hughes, G Sloan, Terence Williams, M I Galla, A Giehl, I Greene, A M Kleinknecht, K Quast, G Renk, B Rohne, E Sander, H G Van Gemmeren, P Zeitnitz, C Aubert, Jean-Jacques Bencheikh, A M Benchouk, C Bonissent, A Bujosa, G Calvet, D Carr, J Diaconu, C A Etienne, F Konstantinidis, N P Payre, P Rousseau, D Talby, M Sadouki, A Thulasidas, M Trabelsi, K Aleppo, M Ragusa, F Abt, I Assmann, R W Bauer, C Blum, Walter Dietl, H Dydak, Friedrich Ganis, G Gotzhein, C Jakobs, K Kroha, H Lütjens, G Lutz, Gerhard Männer, W Moser, H G Richter, R H Rosado-Schlosser, A Schael, S Settles, Ronald Seywerd, H C J Saint-Denis, R Wiedenmann, W Wolf, G Boucrot, J Callot, O Choi, Y Cordier, A Davier, M Duflot, L Grivaz, J F Heusse, P Höcker, A Jacholkowska, A Jacquet, M Kim, D W Le Diberder, F R Lefrançois, J Lutz, A M Nikolic, I A Park, H J Schune, M H Simion, S Veillet, J J Videau, I Zerwas, D Azzurri, P Bagliesi, G Batignani, G Bettarini, S Bozzi, C Calderini, G Carpinelli, M Ciocci, M A Ciulli, V Dell'Orso, R Fantechi, R Ferrante, I Foà, L Forti, F Giassi, A Giorgi, M A Gregorio, A Ligabue, F Lusiani, A Marrocchesi, P S Messineo, A Palla, Fabrizio Rizzo, G Sanguinetti, G Sciabà, A Spagnolo, P Steinberger, Jack Tenchini, Roberto Tonelli, G Vannini, C Verdini, P G Walsh, J Blair, G A Bryant, L M Cerutti, F Chambers, J T Gao, Y Green, M G Medcalf, T Perrodo, P Strong, J A Von Wimmersperg-Töller, J H Botterill, David R Clifft, R W Edgecock, T R Haywood, S Maley, P Norton, P R Thompson, J C Wright, A E Bloch-Devaux, B Colas, P Emery, S Kozanecki, Witold Lançon, E Lemaire, M C Locci, E Marx, B Pérez, P Rander, J Renardy, J F Roussarie, A Schuller, J P Schwindling, J Trabelsi, A Vallage, B Black, S N Dann, J H Johnson, R P Kim, H Y Litke, A M McNeil, M A Taylor, G Booth, C N Boswell, R Brew, C A J Cartwright, S L Combley, F Köksal, A Lehto, M H Newton, W M Reeve, J Thompson, L F Böhrer, A Brandt, S Büscher, V Cowan, G D Grupen, Claus Minguet-Rodríguez, J A Rivera, F Saraiva, P Smolik, L Stephan, F Apollonio, M Bosisio, L Della Marina, R Giannini, G Gobbo, B Musolino, G Rothberg, J E Wasserbaech, S R Armstrong, S R Elmer, P Feng, Z Ferguson, D P S Gao, Y S González, S Grahl, J Greening, T C Hayes, O J Hu, H McNamara, P A Nachtman, J M Orejudos, W Pan, Y B Saadi, Y Scott, I J Walsh, A M Wu Sau Lan Wu, X Yamartino, J M Zheng, M Zobernig, G
author_facet	Buskulic, Damir De Bonis, I Décamp, D Ghez, P Goy, C Lees, J P Lucotte, A Minard, M N Nief, J Y Odier, P Pietrzyk, B Casado, M P Chmeissani, M Crespo, J M Delfino, M C Efthymiopoulos, I Fernández, E Fernández-Bosman, M Garrido, L Juste, A Martínez, M Orteu, S Padilla, C Park, I C Pascual, A Perlas, J A Riu, I Sánchez, F Teubert, F Colaleo, A Creanza, D De Palma, M Gelao, G Girone, M Iaselli, Giuseppe Maggi, G Maggi, M Marinelli, N Nuzzo, S Ranieri, A Raso, G 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 Alemany, R Bazarko, A O Bonvicini, G Cattaneo, M Comas, P Coyle, P Drevermann, H Forty, Roger W Frank, M Hagelberg, R Harvey, J Janot, P Jost, B Kneringer, E Knobloch, J Lehraus, Ivan Lutters, G Martin, E B Mato, P Minten, Adolf G Miquel, R Mir, L M Moneta, L Oest, T Pacheco, A Pusztaszeri, J F Ranjard, F Rensing, P E Rolandi, Luigi Schlatter, W D Schmelling, M Schmitt, M Schneider, O Tejessy, W Tomalin, I R Venturi, A Wachsmuth, H W Wagner, A Ajaltouni, Ziad J Barrès, A Boyer, C Falvard, A Gay, P Guicheney, C Henrard, P Jousset, J Michel, B Monteil, S Montret, J C Pallin, D Perret, P Podlyski, F Proriol, J Rosnet, P Rossignol, J M Fearnley, Tom Hansen, J B Hansen, J D Hansen, J R Hansen, P H Nilsson, B S Rensch, B Wäänänen, A Kyriakis, A Markou, C Simopoulou, Errietta Siotis, I Vayaki, Anna Zachariadou, K Blondel, A Bonneaud, G R Brient, J C Bourdon, P Rougé, A Rumpf, M Valassi, Andrea Verderi, M Videau, H L Candlin, D J Parsons, M I Focardi, E Parrini, G Corden, M Georgiopoulos, C H Jaffe, D E Antonelli, A Bencivenni, G Bologna, G Bossi, F Campana, P Capon, G Casper, David William Chiarella, V Felici, G Laurelli, P Mannocchi, G Murtas, F Murtas, G P Passalacqua, L Pepé-Altarelli, M Curtis, L Dorris, S J Halley, A W Knowles, I G Lynch, J G O'Shea, V Raine, C Reeves, P Scarr, J M Smith, K Teixeira-Dias, P Thompson, A S Thomson, F Thorn, S Turnbull, R M Becker, U Geweniger, C Graefe, G Hanke, P Hansper, G Hepp, V Kluge, E E Putzer, A Schmidt, M Sommer, J Stenzel, H Tittel, K Werner, S Wunsch, M Abbaneo, D Beuselinck, R Binnie, David M Cameron, W Dornan, Peter J Moutoussi, A Nash, J Sedgbeer, J K Stacey, A M Williams, M D Dissertori, G Girtler, P Kuhn, D Rudolph, G Betteridge, A P Bowdery, C K Colrain, P Crawford, G Finch, A J Foster, F Hughes, G Sloan, Terence Williams, M I Galla, A Giehl, I Greene, A M Kleinknecht, K Quast, G Renk, B Rohne, E Sander, H G Van Gemmeren, P Zeitnitz, C Aubert, Jean-Jacques Bencheikh, A M Benchouk, C Bonissent, A Bujosa, G Calvet, D Carr, J Diaconu, C A Etienne, F Konstantinidis, N P Payre, P Rousseau, D Talby, M Sadouki, A Thulasidas, M Trabelsi, K Aleppo, M Ragusa, F Abt, I Assmann, R W Bauer, C Blum, Walter Dietl, H Dydak, Friedrich Ganis, G Gotzhein, C Jakobs, K Kroha, H Lütjens, G Lutz, Gerhard Männer, W Moser, H G Richter, R H Rosado-Schlosser, A Schael, S Settles, Ronald Seywerd, H C J Saint-Denis, R Wiedenmann, W Wolf, G Boucrot, J Callot, O Choi, Y Cordier, A Davier, M Duflot, L Grivaz, J F Heusse, P Höcker, A Jacholkowska, A Jacquet, M Kim, D W Le Diberder, F R Lefrançois, J Lutz, A M Nikolic, I A Park, H J Schune, M H Simion, S Veillet, J J Videau, I Zerwas, D Azzurri, P Bagliesi, G Batignani, G Bettarini, S Bozzi, C Calderini, G Carpinelli, M Ciocci, M A Ciulli, V Dell'Orso, R Fantechi, R Ferrante, I Foà, L Forti, F Giassi, A Giorgi, M A Gregorio, A Ligabue, F Lusiani, A Marrocchesi, P S Messineo, A Palla, Fabrizio Rizzo, G Sanguinetti, G Sciabà, A Spagnolo, P Steinberger, Jack Tenchini, Roberto Tonelli, G Vannini, C Verdini, P G Walsh, J Blair, G A Bryant, L M Cerutti, F Chambers, J T Gao, Y Green, M G Medcalf, T Perrodo, P Strong, J A Von Wimmersperg-Töller, J H Botterill, David R Clifft, R W Edgecock, T R Haywood, S Maley, P Norton, P R Thompson, J C Wright, A E Bloch-Devaux, B Colas, P Emery, S Kozanecki, Witold Lançon, E Lemaire, M C Locci, E Marx, B Pérez, P Rander, J Renardy, J F Roussarie, A Schuller, J P Schwindling, J Trabelsi, A Vallage, B Black, S N Dann, J H Johnson, R P Kim, H Y Litke, A M McNeil, M A Taylor, G Booth, C N Boswell, R Brew, C A J Cartwright, S L Combley, F Köksal, A Lehto, M H Newton, W M Reeve, J Thompson, L F Böhrer, A Brandt, S Büscher, V Cowan, G D Grupen, Claus Minguet-Rodríguez, J A Rivera, F Saraiva, P Smolik, L Stephan, F Apollonio, M Bosisio, L Della Marina, R Giannini, G Gobbo, B Musolino, G Rothberg, J E Wasserbaech, S R Armstrong, S R Elmer, P Feng, Z Ferguson, D P S Gao, Y S González, S Grahl, J Greening, T C Hayes, O J Hu, H McNamara, P A Nachtman, J M Orejudos, W Pan, Y B Saadi, Y Scott, I J Walsh, A M Wu Sau Lan Wu, X Yamartino, J M Zheng, M Zobernig, G
author_sort	Buskulic, Damir
collection	CERN
description	In a data sample of approximately four million hadronic Z decays recorded with the ALEPH detector from 1990 to 1995, a search for the strange b baryon Xi_b is performed with a study of Xi-lepton correlations. Forty-four events with same sign Xi- l- combinations are found whereas 8.4 are expected based on on the rate of opposite sign Xi- l+ combinations. This significant excess is interpreted as evidence for Xi_b semileptonic decays. The measured product branching ratio is: Br( b -> Xi_b) Br( Xi_b -> Xc X l- nu) Br( Xc -> Xi- X') = (5.4 +/- 1.1(stat) +/- 0.8(syst) ) 10**-4 per lepton species, averaged over electrons and muons, with Xc a charmed baryo\ n. The Xi_b lifetime is measured to be : tau = 1.35 (+0.37 -0.28 (stat)) (+0.15 -0.17 (syst)) ps.
id	cern-306603
institution	Organización Europea para la Investigación Nuclear
language	eng
publishDate	1996
record_format	invenio
spelling	cern-3066032019-09-30T06:29:59Zdoi:10.1016/0370-2693(96)00925-2http://cds.cern.ch/record/306603engBuskulic, DamirDe Bonis, IDécamp, DGhez, PGoy, CLees, J PLucotte, AMinard, M NNief, J YOdier, PPietrzyk, BCasado, M PChmeissani, MCrespo, J MDelfino, M CEfthymiopoulos, IFernández, EFernández-Bosman, MGarrido, LJuste, AMartínez, MOrteu, SPadilla, CPark, I CPascual, APerlas, J ARiu, ISánchez, FTeubert, FColaleo, ACreanza, DDe Palma, MGelao, GGirone, MIaselli, GiuseppeMaggi, GMaggi, MMarinelli, NNuzzo, SRanieri, ARaso, GRuggieri, FSelvaggi, GSilvestris, LTempesta, PZito, GHuang, XLin, JOuyang, QWang, TXie, YXu, RXue, SZhang, JZhang, LZhao, WAlemany, RBazarko, A OBonvicini, GCattaneo, MComas, PCoyle, PDrevermann, HForty, Roger WFrank, MHagelberg, RHarvey, JJanot, PJost, BKneringer, EKnobloch, JLehraus, IvanLutters, GMartin, E BMato, PMinten, Adolf GMiquel, RMir, L MMoneta, LOest, TPacheco, APusztaszeri, J FRanjard, FRensing, P ERolandi, LuigiSchlatter, W DSchmelling, MSchmitt, MSchneider, OTejessy, WTomalin, I RVenturi, AWachsmuth, H WWagner, AAjaltouni, Ziad JBarrès, ABoyer, CFalvard, AGay, PGuicheney, CHenrard, PJousset, JMichel, BMonteil, SMontret, J CPallin, DPerret, PPodlyski, FProriol, JRosnet, PRossignol, J MFearnley, TomHansen, J BHansen, J DHansen, J RHansen, P HNilsson, B SRensch, BWäänänen, AKyriakis, AMarkou, CSimopoulou, ErriettaSiotis, IVayaki, AnnaZachariadou, KBlondel, ABonneaud, G RBrient, J CBourdon, PRougé, ARumpf, MValassi, AndreaVerderi, MVideau, H LCandlin, D JParsons, M IFocardi, EParrini, GCorden, MGeorgiopoulos, C HJaffe, D EAntonelli, ABencivenni, GBologna, GBossi, FCampana, PCapon, GCasper, David WilliamChiarella, VFelici, GLaurelli, PMannocchi, GMurtas, FMurtas, G PPassalacqua, LPepé-Altarelli, MCurtis, LDorris, S JHalley, A WKnowles, I GLynch, J GO'Shea, VRaine, CReeves, PScarr, J MSmith, KTeixeira-Dias, PThompson, A SThomson, FThorn, STurnbull, R MBecker, UGeweniger, CGraefe, GHanke, PHansper, GHepp, VKluge, E EPutzer, ASchmidt, MSommer, JStenzel, HTittel, KWerner, SWunsch, MAbbaneo, DBeuselinck, RBinnie, David MCameron, WDornan, Peter JMoutoussi, ANash, JSedgbeer, J KStacey, A MWilliams, M DDissertori, GGirtler, PKuhn, DRudolph, GBetteridge, A PBowdery, C KColrain, PCrawford, GFinch, A JFoster, FHughes, GSloan, TerenceWilliams, M IGalla, AGiehl, IGreene, A MKleinknecht, KQuast, GRenk, BRohne, ESander, H GVan Gemmeren, PZeitnitz, CAubert, Jean-JacquesBencheikh, A MBenchouk, CBonissent, ABujosa, GCalvet, DCarr, JDiaconu, C AEtienne, FKonstantinidis, N PPayre, PRousseau, DTalby, MSadouki, AThulasidas, MTrabelsi, KAleppo, MRagusa, FAbt, IAssmann, R WBauer, CBlum, WalterDietl, HDydak, FriedrichGanis, GGotzhein, CJakobs, KKroha, HLütjens, GLutz, GerhardMänner, WMoser, H GRichter, R HRosado-Schlosser, ASchael, SSettles, RonaldSeywerd, H C JSaint-Denis, RWiedenmann, WWolf, GBoucrot, JCallot, OChoi, YCordier, ADavier, MDuflot, LGrivaz, J FHeusse, PHöcker, AJacholkowska, AJacquet, MKim, D WLe Diberder, F RLefrançois, JLutz, A MNikolic, I APark, H JSchune, M HSimion, SVeillet, J JVideau, IZerwas, DAzzurri, PBagliesi, GBatignani, GBettarini, SBozzi, CCalderini, GCarpinelli, MCiocci, M ACiulli, VDell'Orso, RFantechi, RFerrante, IFoà, LForti, FGiassi, AGiorgi, M AGregorio, ALigabue, FLusiani, AMarrocchesi, P SMessineo, APalla, FabrizioRizzo, GSanguinetti, GSciabà, ASpagnolo, PSteinberger, JackTenchini, RobertoTonelli, GVannini, CVerdini, P GWalsh, JBlair, G ABryant, L MCerutti, FChambers, J TGao, YGreen, M GMedcalf, TPerrodo, PStrong, J AVon Wimmersperg-Töller, J HBotterill, David RClifft, R WEdgecock, T RHaywood, SMaley, PNorton, P RThompson, J CWright, A EBloch-Devaux, BColas, PEmery, SKozanecki, WitoldLançon, ELemaire, M CLocci, EMarx, BPérez, PRander, JRenardy, J FRoussarie, ASchuller, J PSchwindling, JTrabelsi, AVallage, BBlack, S NDann, J HJohnson, R PKim, H YLitke, A MMcNeil, M ATaylor, GBooth, C NBoswell, RBrew, C A JCartwright, S LCombley, FKöksal, ALehto, M HNewton, W MReeve, JThompson, L FBöhrer, ABrandt, SBüscher, VCowan, G DGrupen, ClausMinguet-Rodríguez, J ARivera, FSaraiva, PSmolik, LStephan, FApollonio, MBosisio, LDella Marina, RGiannini, GGobbo, BMusolino, GRothberg, J EWasserbaech, S RArmstrong, S RElmer, PFeng, ZFerguson, D P SGao, Y SGonzález, SGrahl, JGreening, T CHayes, O JHu, HMcNamara, P ANachtman, J MOrejudos, WPan, Y BSaadi, YScott, I JWalsh, A MWu Sau LanWu, XYamartino, J MZheng, MZobernig, GStrange b baryon production and lifetime in Z decaysParticle Physics - ExperimentIn a data sample of approximately four million hadronic Z decays recorded with the ALEPH detector from 1990 to 1995, a search for the strange b baryon Xi_b is performed with a study of Xi-lepton correlations. Forty-four events with same sign Xi- l- combinations are found whereas 8.4 are expected based on on the rate of opposite sign Xi- l+ combinations. This significant excess is interpreted as evidence for Xi_b semileptonic decays. The measured product branching ratio is: Br( b -> Xi_b) Br( Xi_b -> Xc X l- nu) Br( Xc -> Xi- X') = (5.4 +/- 1.1(stat) +/- 0.8(syst) ) 10**-4 per lepton species, averaged over electrons and muons, with Xc a charmed baryo\ n. The Xi_b lifetime is measured to be : tau = 1.35 (+0.37 -0.28 (stat)) (+0.15 -0.17 (syst)) ps.CERN-PPE-96-081FSU-SCRI-96-125oai:cds.cern.ch:3066031996-06-19
spellingShingle	Particle Physics - Experiment Buskulic, Damir De Bonis, I Décamp, D Ghez, P Goy, C Lees, J P Lucotte, A Minard, M N Nief, J Y Odier, P Pietrzyk, B Casado, M P Chmeissani, M Crespo, J M Delfino, M C Efthymiopoulos, I Fernández, E Fernández-Bosman, M Garrido, L Juste, A Martínez, M Orteu, S Padilla, C Park, I C Pascual, A Perlas, J A Riu, I Sánchez, F Teubert, F Colaleo, A Creanza, D De Palma, M Gelao, G Girone, M Iaselli, Giuseppe Maggi, G Maggi, M Marinelli, N Nuzzo, S Ranieri, A Raso, G 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 Alemany, R Bazarko, A O Bonvicini, G Cattaneo, M Comas, P Coyle, P Drevermann, H Forty, Roger W Frank, M Hagelberg, R Harvey, J Janot, P Jost, B Kneringer, E Knobloch, J Lehraus, Ivan Lutters, G Martin, E B Mato, P Minten, Adolf G Miquel, R Mir, L M Moneta, L Oest, T Pacheco, A Pusztaszeri, J F Ranjard, F Rensing, P E Rolandi, Luigi Schlatter, W D Schmelling, M Schmitt, M Schneider, O Tejessy, W Tomalin, I R Venturi, A Wachsmuth, H W Wagner, A Ajaltouni, Ziad J Barrès, A Boyer, C Falvard, A Gay, P Guicheney, C Henrard, P Jousset, J Michel, B Monteil, S Montret, J C Pallin, D Perret, P Podlyski, F Proriol, J Rosnet, P Rossignol, J M Fearnley, Tom Hansen, J B Hansen, J D Hansen, J R Hansen, P H Nilsson, B S Rensch, B Wäänänen, A Kyriakis, A Markou, C Simopoulou, Errietta Siotis, I Vayaki, Anna Zachariadou, K Blondel, A Bonneaud, G R Brient, J C Bourdon, P Rougé, A Rumpf, M Valassi, Andrea Verderi, M Videau, H L Candlin, D J Parsons, M I Focardi, E Parrini, G Corden, M Georgiopoulos, C H Jaffe, D E Antonelli, A Bencivenni, G Bologna, G Bossi, F Campana, P Capon, G Casper, David William Chiarella, V Felici, G Laurelli, P Mannocchi, G Murtas, F Murtas, G P Passalacqua, L Pepé-Altarelli, M Curtis, L Dorris, S J Halley, A W Knowles, I G Lynch, J G O'Shea, V Raine, C Reeves, P Scarr, J M Smith, K Teixeira-Dias, P Thompson, A S Thomson, F Thorn, S Turnbull, R M Becker, U Geweniger, C Graefe, G Hanke, P Hansper, G Hepp, V Kluge, E E Putzer, A Schmidt, M Sommer, J Stenzel, H Tittel, K Werner, S Wunsch, M Abbaneo, D Beuselinck, R Binnie, David M Cameron, W Dornan, Peter J Moutoussi, A Nash, J Sedgbeer, J K Stacey, A M Williams, M D Dissertori, G Girtler, P Kuhn, D Rudolph, G Betteridge, A P Bowdery, C K Colrain, P Crawford, G Finch, A J Foster, F Hughes, G Sloan, Terence Williams, M I Galla, A Giehl, I Greene, A M Kleinknecht, K Quast, G Renk, B Rohne, E Sander, H G Van Gemmeren, P Zeitnitz, C Aubert, Jean-Jacques Bencheikh, A M Benchouk, C Bonissent, A Bujosa, G Calvet, D Carr, J Diaconu, C A Etienne, F Konstantinidis, N P Payre, P Rousseau, D Talby, M Sadouki, A Thulasidas, M Trabelsi, K Aleppo, M Ragusa, F Abt, I Assmann, R W Bauer, C Blum, Walter Dietl, H Dydak, Friedrich Ganis, G Gotzhein, C Jakobs, K Kroha, H Lütjens, G Lutz, Gerhard Männer, W Moser, H G Richter, R H Rosado-Schlosser, A Schael, S Settles, Ronald Seywerd, H C J Saint-Denis, R Wiedenmann, W Wolf, G Boucrot, J Callot, O Choi, Y Cordier, A Davier, M Duflot, L Grivaz, J F Heusse, P Höcker, A Jacholkowska, A Jacquet, M Kim, D W Le Diberder, F R Lefrançois, J Lutz, A M Nikolic, I A Park, H J Schune, M H Simion, S Veillet, J J Videau, I Zerwas, D Azzurri, P Bagliesi, G Batignani, G Bettarini, S Bozzi, C Calderini, G Carpinelli, M Ciocci, M A Ciulli, V Dell'Orso, R Fantechi, R Ferrante, I Foà, L Forti, F Giassi, A Giorgi, M A Gregorio, A Ligabue, F Lusiani, A Marrocchesi, P S Messineo, A Palla, Fabrizio Rizzo, G Sanguinetti, G Sciabà, A Spagnolo, P Steinberger, Jack Tenchini, Roberto Tonelli, G Vannini, C Verdini, P G Walsh, J Blair, G A Bryant, L M Cerutti, F Chambers, J T Gao, Y Green, M G Medcalf, T Perrodo, P Strong, J A Von Wimmersperg-Töller, J H Botterill, David R Clifft, R W Edgecock, T R Haywood, S Maley, P Norton, P R Thompson, J C Wright, A E Bloch-Devaux, B Colas, P Emery, S Kozanecki, Witold Lançon, E Lemaire, M C Locci, E Marx, B Pérez, P Rander, J Renardy, J F Roussarie, A Schuller, J P Schwindling, J Trabelsi, A Vallage, B Black, S N Dann, J H Johnson, R P Kim, H Y Litke, A M McNeil, M A Taylor, G Booth, C N Boswell, R Brew, C A J Cartwright, S L Combley, F Köksal, A Lehto, M H Newton, W M Reeve, J Thompson, L F Böhrer, A Brandt, S Büscher, V Cowan, G D Grupen, Claus Minguet-Rodríguez, J A Rivera, F Saraiva, P Smolik, L Stephan, F Apollonio, M Bosisio, L Della Marina, R Giannini, G Gobbo, B Musolino, G Rothberg, J E Wasserbaech, S R Armstrong, S R Elmer, P Feng, Z Ferguson, D P S Gao, Y S González, S Grahl, J Greening, T C Hayes, O J Hu, H McNamara, P A Nachtman, J M Orejudos, W Pan, Y B Saadi, Y Scott, I J Walsh, A M Wu Sau Lan Wu, X Yamartino, J M Zheng, M Zobernig, G Strange b baryon production and lifetime in Z decays
title	Strange b baryon production and lifetime in Z decays
title_full	Strange b baryon production and lifetime in Z decays
title_fullStr	Strange b baryon production and lifetime in Z decays
title_full_unstemmed	Strange b baryon production and lifetime in Z decays
title_short	Strange b baryon production and lifetime in Z decays
title_sort	strange b baryon production and lifetime in z decays
topic	Particle Physics - Experiment
url	https://dx.doi.org/10.1016/0370-2693(96)00925-2 http://cds.cern.ch/record/306603
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strangebbaryonproductionandlifetimeinzdecays AT dietlh strangebbaryonproductionandlifetimeinzdecays AT dydakfriedrich strangebbaryonproductionandlifetimeinzdecays AT ganisg strangebbaryonproductionandlifetimeinzdecays AT gotzheinc strangebbaryonproductionandlifetimeinzdecays AT jakobsk strangebbaryonproductionandlifetimeinzdecays AT krohah strangebbaryonproductionandlifetimeinzdecays AT lutjensg strangebbaryonproductionandlifetimeinzdecays AT lutzgerhard strangebbaryonproductionandlifetimeinzdecays AT mannerw strangebbaryonproductionandlifetimeinzdecays AT moserhg strangebbaryonproductionandlifetimeinzdecays AT richterrh strangebbaryonproductionandlifetimeinzdecays AT rosadoschlossera strangebbaryonproductionandlifetimeinzdecays AT schaels strangebbaryonproductionandlifetimeinzdecays AT settlesronald strangebbaryonproductionandlifetimeinzdecays AT seywerdhcj strangebbaryonproductionandlifetimeinzdecays AT saintdenisr strangebbaryonproductionandlifetimeinzdecays AT wiedenmannw strangebbaryonproductionandlifetimeinzdecays AT wolfg strangebbaryonproductionandlifetimeinzdecays AT boucrotj strangebbaryonproductionandlifetimeinzdecays AT calloto strangebbaryonproductionandlifetimeinzdecays AT choiy strangebbaryonproductionandlifetimeinzdecays AT cordiera strangebbaryonproductionandlifetimeinzdecays AT davierm strangebbaryonproductionandlifetimeinzdecays AT duflotl strangebbaryonproductionandlifetimeinzdecays AT grivazjf strangebbaryonproductionandlifetimeinzdecays AT heussep strangebbaryonproductionandlifetimeinzdecays AT hockera strangebbaryonproductionandlifetimeinzdecays AT jacholkowskaa strangebbaryonproductionandlifetimeinzdecays AT jacquetm strangebbaryonproductionandlifetimeinzdecays AT kimdw strangebbaryonproductionandlifetimeinzdecays AT lediberderfr strangebbaryonproductionandlifetimeinzdecays AT lefrancoisj strangebbaryonproductionandlifetimeinzdecays AT lutzam strangebbaryonproductionandlifetimeinzdecays AT nikolicia strangebbaryonproductionandlifetimeinzdecays AT parkhj strangebbaryonproductionandlifetimeinzdecays AT schunemh strangebbaryonproductionandlifetimeinzdecays AT simions strangebbaryonproductionandlifetimeinzdecays AT veilletjj strangebbaryonproductionandlifetimeinzdecays AT videaui strangebbaryonproductionandlifetimeinzdecays AT zerwasd strangebbaryonproductionandlifetimeinzdecays AT azzurrip strangebbaryonproductionandlifetimeinzdecays AT bagliesig strangebbaryonproductionandlifetimeinzdecays AT batignanig strangebbaryonproductionandlifetimeinzdecays AT bettarinis strangebbaryonproductionandlifetimeinzdecays AT bozzic strangebbaryonproductionandlifetimeinzdecays AT calderinig strangebbaryonproductionandlifetimeinzdecays AT carpinellim strangebbaryonproductionandlifetimeinzdecays AT cioccima strangebbaryonproductionandlifetimeinzdecays AT ciulliv strangebbaryonproductionandlifetimeinzdecays AT dellorsor strangebbaryonproductionandlifetimeinzdecays AT fantechir strangebbaryonproductionandlifetimeinzdecays AT ferrantei strangebbaryonproductionandlifetimeinzdecays AT foal strangebbaryonproductionandlifetimeinzdecays AT fortif strangebbaryonproductionandlifetimeinzdecays AT giassia strangebbaryonproductionandlifetimeinzdecays AT giorgima strangebbaryonproductionandlifetimeinzdecays AT gregorioa strangebbaryonproductionandlifetimeinzdecays AT ligabuef strangebbaryonproductionandlifetimeinzdecays AT lusiania strangebbaryonproductionandlifetimeinzdecays AT marrocchesips strangebbaryonproductionandlifetimeinzdecays AT messineoa strangebbaryonproductionandlifetimeinzdecays AT pallafabrizio strangebbaryonproductionandlifetimeinzdecays AT rizzog strangebbaryonproductionandlifetimeinzdecays AT sanguinettig strangebbaryonproductionandlifetimeinzdecays AT sciabaa strangebbaryonproductionandlifetimeinzdecays AT spagnolop strangebbaryonproductionandlifetimeinzdecays AT steinbergerjack strangebbaryonproductionandlifetimeinzdecays AT tenchiniroberto strangebbaryonproductionandlifetimeinzdecays AT tonellig strangebbaryonproductionandlifetimeinzdecays AT vanninic strangebbaryonproductionandlifetimeinzdecays AT verdinipg strangebbaryonproductionandlifetimeinzdecays AT walshj strangebbaryonproductionandlifetimeinzdecays AT blairga strangebbaryonproductionandlifetimeinzdecays AT bryantlm strangebbaryonproductionandlifetimeinzdecays AT ceruttif strangebbaryonproductionandlifetimeinzdecays AT chambersjt strangebbaryonproductionandlifetimeinzdecays AT gaoy strangebbaryonproductionandlifetimeinzdecays AT greenmg strangebbaryonproductionandlifetimeinzdecays AT medcalft strangebbaryonproductionandlifetimeinzdecays AT perrodop strangebbaryonproductionandlifetimeinzdecays AT strongja strangebbaryonproductionandlifetimeinzdecays AT vonwimmerspergtollerjh strangebbaryonproductionandlifetimeinzdecays AT botterilldavidr strangebbaryonproductionandlifetimeinzdecays AT clifftrw strangebbaryonproductionandlifetimeinzdecays AT edgecocktr strangebbaryonproductionandlifetimeinzdecays AT haywoods strangebbaryonproductionandlifetimeinzdecays AT maleyp strangebbaryonproductionandlifetimeinzdecays AT nortonpr strangebbaryonproductionandlifetimeinzdecays AT thompsonjc strangebbaryonproductionandlifetimeinzdecays AT wrightae strangebbaryonproductionandlifetimeinzdecays AT blochdevauxb strangebbaryonproductionandlifetimeinzdecays AT colasp strangebbaryonproductionandlifetimeinzdecays AT emerys strangebbaryonproductionandlifetimeinzdecays AT kozaneckiwitold strangebbaryonproductionandlifetimeinzdecays AT lancone strangebbaryonproductionandlifetimeinzdecays AT lemairemc strangebbaryonproductionandlifetimeinzdecays AT loccie strangebbaryonproductionandlifetimeinzdecays AT marxb strangebbaryonproductionandlifetimeinzdecays AT perezp strangebbaryonproductionandlifetimeinzdecays AT randerj strangebbaryonproductionandlifetimeinzdecays AT renardyjf strangebbaryonproductionandlifetimeinzdecays AT roussariea strangebbaryonproductionandlifetimeinzdecays AT schullerjp strangebbaryonproductionandlifetimeinzdecays AT schwindlingj strangebbaryonproductionandlifetimeinzdecays AT trabelsia strangebbaryonproductionandlifetimeinzdecays AT vallageb strangebbaryonproductionandlifetimeinzdecays AT blacksn strangebbaryonproductionandlifetimeinzdecays AT dannjh strangebbaryonproductionandlifetimeinzdecays AT johnsonrp strangebbaryonproductionandlifetimeinzdecays AT kimhy strangebbaryonproductionandlifetimeinzdecays AT litkeam strangebbaryonproductionandlifetimeinzdecays AT mcneilma strangebbaryonproductionandlifetimeinzdecays AT taylorg strangebbaryonproductionandlifetimeinzdecays AT boothcn strangebbaryonproductionandlifetimeinzdecays AT boswellr strangebbaryonproductionandlifetimeinzdecays AT brewcaj strangebbaryonproductionandlifetimeinzdecays AT cartwrightsl strangebbaryonproductionandlifetimeinzdecays AT combleyf strangebbaryonproductionandlifetimeinzdecays AT koksala strangebbaryonproductionandlifetimeinzdecays AT lehtomh strangebbaryonproductionandlifetimeinzdecays AT newtonwm strangebbaryonproductionandlifetimeinzdecays AT reevej strangebbaryonproductionandlifetimeinzdecays AT thompsonlf strangebbaryonproductionandlifetimeinzdecays AT bohrera strangebbaryonproductionandlifetimeinzdecays AT brandts strangebbaryonproductionandlifetimeinzdecays AT buscherv strangebbaryonproductionandlifetimeinzdecays AT cowangd strangebbaryonproductionandlifetimeinzdecays AT grupenclaus strangebbaryonproductionandlifetimeinzdecays AT minguetrodriguezja strangebbaryonproductionandlifetimeinzdecays AT riveraf strangebbaryonproductionandlifetimeinzdecays AT saraivap strangebbaryonproductionandlifetimeinzdecays AT smolikl strangebbaryonproductionandlifetimeinzdecays AT stephanf strangebbaryonproductionandlifetimeinzdecays AT apolloniom strangebbaryonproductionandlifetimeinzdecays AT bosisiol strangebbaryonproductionandlifetimeinzdecays AT dellamarinar strangebbaryonproductionandlifetimeinzdecays AT gianninig strangebbaryonproductionandlifetimeinzdecays AT gobbob strangebbaryonproductionandlifetimeinzdecays AT musolinog strangebbaryonproductionandlifetimeinzdecays AT rothbergje strangebbaryonproductionandlifetimeinzdecays AT wasserbaechsr strangebbaryonproductionandlifetimeinzdecays AT armstrongsr strangebbaryonproductionandlifetimeinzdecays AT elmerp strangebbaryonproductionandlifetimeinzdecays AT fengz strangebbaryonproductionandlifetimeinzdecays AT fergusondps strangebbaryonproductionandlifetimeinzdecays AT gaoys strangebbaryonproductionandlifetimeinzdecays AT gonzalezs strangebbaryonproductionandlifetimeinzdecays AT grahlj strangebbaryonproductionandlifetimeinzdecays AT greeningtc strangebbaryonproductionandlifetimeinzdecays AT hayesoj strangebbaryonproductionandlifetimeinzdecays AT huh strangebbaryonproductionandlifetimeinzdecays AT mcnamarapa strangebbaryonproductionandlifetimeinzdecays AT nachtmanjm strangebbaryonproductionandlifetimeinzdecays AT orejudosw strangebbaryonproductionandlifetimeinzdecays AT panyb strangebbaryonproductionandlifetimeinzdecays AT saadiy strangebbaryonproductionandlifetimeinzdecays AT scottij strangebbaryonproductionandlifetimeinzdecays AT walsham strangebbaryonproductionandlifetimeinzdecays AT wusaulan strangebbaryonproductionandlifetimeinzdecays AT wux strangebbaryonproductionandlifetimeinzdecays AT yamartinojm strangebbaryonproductionandlifetimeinzdecays AT zhengm strangebbaryonproductionandlifetimeinzdecays AT zobernigg strangebbaryonproductionandlifetimeinzdecays

Strange b baryon production and lifetime in Z decays

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