Production of Ξc0 and Ξb in Z decays and lifetime measurement of Ξb

J. Abdallah, P. Abreu, W. Adam, P. Adzic, T. Albrecht, T. Alderweireld, R. Alemany-Fernandez, T. Allmendinger, P. P. Allport, U. Amaldi, N. Amapane, S. Amato, E. Anashkin, A. Andreazza, S. Andringa, N. Anjos, P. Antilogus, W. D. Apel, Y. Arnoud, S. AskB. Asman, J. E. Augustin, A. Augustinus, P. Baillon, A. Ballestrero, P. Bambade, R. Barbier, D. Bardin, G. J. Barker, A. Baroncelli, M. Battaglia, M. Baubillier, K. H. Becks, M. Begalli, A. Behrmann, E. Ben-Haim, N. Benekos, A. Benvenuti, C. Berat, M. Berggren, L. Berntzon, D. Bertrand, M. Besancon, N. Besson, D. Bloch, M. Blom, M. Bluj, M. Bonesini, M. Boonekamp, P. S L Booth, G. Borisov, O. Botner, B. Bouquet, T. J V Bowcock, I. Boyko, M. Bracko, R. Brenner, E. Brodet, P. Bruckman, J. M. Brunet, P. Buschmann, M. Calvi, T. Camporesi, V. Canale, F. Carena, N. Castro, F. Cavallo, M. Chapkin, Ph Charpentier, P. Checchia, R. Chierici, P. Chliapnikov, J. Chudoba, S. U. Chung, K. Cieslik, P. Collins, R. Contri, G. Cosme, F. Cossutti, M. J. Costa, D. Crennell, J. Cuevas, J. D'Hondt, J. Dalmau, T. da Silva, W. da Silva, G. della Ricca, A. de Angelis, W. de Boer, C. de Clercq, B. de Lotto, N. de Maria, A. de Min, L. de Paula, L. Di Ciaccio, A. Di Simone, K. Doroba, J. Drees, G. Eigen, T. Ekelof, M. Ellert, M. Elsing, M. C. Espirito Santo, G. Fanourakis, D. Fassouliotis, M. Feindt, J. Fernandez, A. Ferrer, F. Ferro, U. Flagmeyer, H. Foeth, E. Fokitis, F. Fulda-Quenzer, J. Fuster, M. Gandelman, C. Garcia, Ph Gavillet, E. Gazis, R. Gokieli, B. Golob, G. Gomez-Ceballos, P. Goncalves, E. Graziani, G. Grosdidier, K. Grzelak, J. Guy, C. Haag, A. Hallgren, K. Hamacher, K. Hamilton, S. Haug, F. Hauler, V. Hedberg, M. Hennecke, H. Herr, J. Hoffman, S. O. Holmgren, P. J. Holt, M. A. Houlden, K. Hultqvist, J. N. Jackson, G. Jarlskog, P. Jarry, D. Jeans, E. K. Johansson, P. D. Johansson, P. Jonsson, C. Joram, L. Jungermann, F. Kapusta, S. Katsanevas, E. Katsoufis, G. Kernel, B. P. Kersevan, U. Kerzel, B. T. King, N. J. Kjaer, P. Kluit, P. Kokkinias, C. Kourkoumelis, O. Kouznetsov, Z. Krumstein, M. Kucharczyk, J. Lamsa, G. Leder, F. Ledroit, L. Leinonen, R. Leitner, J. Lemonne, V. Lepeltier, T. Lesiak, W. Liebig, D. Liko, A. Lipniacka, J. H. Lopes, J. M. Lopez, D. Loukas, P. Lutz, L. Lyons, J. MacNaughton, A. Malek, S. Maltezos, F. Mandl, J. Marco, R. Marco, B. Marechal, M. Margoni, J. C. Marin, C. Mariotti, A. Markou, C. Martinez-Rivero, J. Masik, N. Mastroyiannopoulos, F. Matorras, C. Matteuzzi, F. Mazzucato, M. Mazzucato, R. McNulty, C. Meroni, E. Migliore, W. Mitaroff, U. Mjoernmark, T. Moa, M. Moch, K. Moenig, R. Monge, J. Montenegro, D. Moraes, S. Moreno, P. Morettini, U. Mueller, K. Muenich, M. Mulders, L. Mundim, W. Murray, B. Muryn, G. Myatt, T. Myklebust, M. Nassiakou, F. Navarria, K. Nawrocki, R. Nicolaidou, M. Nikolenko, A. Oblakowska-Mucha, V. Obraztsov, A. Olshevski, A. Onofre, R. Orava, K. Osterberg, A. Ouraou, A. Oyanguren, M. Paganoni, S. Paiano, J. P. Palacios, H. Palka, Th D. Papadopoulou, L. Pape, C. Parkes, F. Parodi, U. Parzefall, A. Passeri, O. Passon, L. Peralta, V. Perepelitsa, A. Perrotta, A. Petrolini, J. Piedra, L. Pieri, F. Pierre, M. Pimenta, E. Piotto, T. Podobnik, V. Poireau, M. E. Pol, G. Polok, V. Pozdniakov, N. Pukhaeva, A. Pullia, J. Rames, A. Read, P. Rebecchi, J. Rehn, D. Reid, R. Reinhardt, P. Renton, F. Richard, J. Ridky, M. Rivero, D. Rodriguez, A. Romero, P. Ronchese, P. Roudeau, T. Rovelli, V. Ruhlmann-Kleider, D. Ryabtchikov, A. Sadovsky, L. Salmi, J. Salt, C. Sander, A. Savoy-Navarro, U. Schwickerath, A. Segar, R. Sekulin, M. Siebel, A. Sisakian, G. Smadja, O. Smirnova, A. Sokolov, A. Sopczak, R. Sosnowski, T. Spassov, M. Stanitzki, A. Stocchi, J. Strauss, B. Stugu, M. Szczekowski, M. Szeptycka, T. Szumlak, T. Tabarelli, A. C. Taffard, F. Tegenfeldt, J. Timmermans, L. Tkatchev, M. Tobin, S. Todorovova, B. Tome, A. Tonazzo, P. Tortosa, P. Travnicek, D. Treille, G. Tristram, M. Trochimczuk, C. Troncon, M. L. Turluer, I. A. Tyapkin, P. Tyapkin, S. Tzamarias, V. Uvarov, G. Valenti, P. van Dam, J. van Eldik, N. van Remortel, I. van Vulpen, G. Vegni, F. Veloso, W. Venus, P. Verdier, V. Verzi, D. Vilanova, L. Vitale, V. Vrba, H. Wahlen, A. J. Washbrook, C. Weiser, D. Wicke, J. Wickens, G. Wilkinson, M. Winter, M. Witek, O. Yushchenko, A. Zalewska, P. Zalewski, D. Zavrtanik, V. Zhuravlov, N. I. Zimin, A. Zintchenko, M. Zupan

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The charmed strange baryon Ξc0 was searched for in the decay channel Ξc0 → Ξ-π+, and the beauty strange baryon Ξb in the inclusive channel Ξb → Ξ-ℓ-νX, using the 3.5 million hadronic Z events collected by the DELPHI experiment in the years 1992-1995. The Ξ- was reconstructed through the decay Ξ- → Λπ-, using a constrained fit method for cascade decays. An iterative discriminant analysis was used for the Ξc0 and Ξb selection. The production rates were measured to be fΞ0 c ×BR(Ξc0 → Ξ-π+) = (4.7 ± 1.4(stat.) ± 1.1(syst.)) × 10-4 per hadronic Z decay, and BR(b → Ξb)×BR(Ξb → Ξ-ℓ-X) = (3.0 ± 1.0(stat.) ± 0.3(syst.)) × 10-4 for each lepton species (electron or muon). The lifetime of the Ξb baryon was measured to be τΞ b = 1.45+0.55 -0.43(stat.) ± 0.13(syst.) ps. A combination with the previous DELPHI lifetime measurement gives τΞ b = 1.48+0.40 -0.31(stat.) ± 0.12(syst.) ps. © Springer-Verlag / Società Italiana di Fisica 2005.
    Original languageEnglish
    Pages (from-to)299-309
    Number of pages10
    JournalEuropean Physical Journal C
    Volume44
    Issue number3
    DOIs
    Publication statusPublished - Oct 2005

    Fingerprint

    Dive into the research topics of 'Production of Ξc0 and Ξb in Z decays and lifetime measurement of Ξb'. Together they form a unique fingerprint.

    Cite this