Measurement of the Λb lifetime in the exclusive decay Λb→J/ψΛ

V. M. Abazov, B. Abbott, M. Abolins, B. S. Acharya, M. Adams, T. Adams, E. Aguilo, S. H. Ahn, M. Ahsan, G. D. Alexeev, G. Alkhazov, A. Alton, G. Alverson, G. A. Alves, M. Anastasoaie, L. S. Ancu, T. Andeen, S. Anderson, B. Andrieu, M. S. AnzelcY. Arnoud, M. Arov, M. Arthaud, A. Askew, B. Åsman, A. C.S.Assis Jesus, O. Atramentov, C. Autermann, C. Avila, C. Ay, F. Badaud, A. Baden, L. Bagby, B. Baldin, D. V. Bandurin, P. Banerjee, S. Banerjee, E. Barberis, A. F. Barfuss, P. Bargassa, P. Baringer, J. Barreto, J. F. Bartlett, U. Bassler, D. Bauer, S. Beale, A. Bean, M. Begalli, M. Begel, C. Belanger-Champagne, L. Bellantoni, A. Bellavance, J. A. Benitez, S. B. Beri, G. Bernardi, R. Bernhard, L. Berntzon, I. Bertram, M. Besançon, R. Beuselinck, V. A. Bezzubov, P. C. Bhat, V. Bhatnagar, C. Biscarat, G. Blazey, F. Blekman, S. Blessing, D. Bloch, K. Bloom, A. Boehnlein, D. Boline, T. A. Bolton, G. Borissov, K. Bos, T. Bose, A. Brandt, R. Brock, G. Brooijmans, A. Bross, D. Brown, N. J. Buchanan, D. Buchholz, M. Buehler, V. Buescher, S. Burdin, S. Burke, T. H. Burnett, C. P. Buszello, J. M. Butler, P. Calfayan, S. Calvet, J. Cammin, S. Caron, W. Carvalho, B. C.K. Casey, N. M. Cason, H. Castilla-Valdez, S. Chakrabarti, D. Chakraborty, K. Chan, K. M. Chan, A. Chandra, F. Charles, E. Cheu, F. Chevallier, D. K. Cho, S. Choi, B. Choudhary, L. Christofek, T. Christoudias, S. Cihangir, D. Claes, B. Clément, C. Clément, Y. Coadou, M. Cooke, W. E. Cooper, M. Corcoran, F. Couderc, M. C. Cousinou, S. Crépé-Renaudin, D. Cutts, M. Ćwiok, H. Da Motta, A. Das, G. Davies, K. De, P. De Jong, S. J. De Jong, E. De La Cruz-Burelo, C. De Oliveira Martins, J. D. Degenhardt, F. Déliot, M. Demarteau, R. Demina, D. Denisov, S. P. Denisov, S. Desai, H. T. Diehl, M. Diesburg, A. Dominguez, H. Dong, L. V. Dudko, L. Duflot, S. R. Dugad, D. Duggan, A. Duperrin, J. Dyer, A. Dyshkant, M. Eads, D. Edmunds, J. Ellison, V. D. Elvira, Y. Enari, S. Eno, P. Ermolov, H. Evans, A. Evdokimov, V. N. Evdokimov, A. V. Ferapontov, T. Ferbel, F. Fiedler, F. Filthaut, W. Fisher, H. E. Fisk, M. Ford, M. Fortner, H. Fox, S. Fu, S. Fuess, T. Gadfort, C. F. Galea, E. Gallas, E. Galyaev, C. Garcia, A. Garcia-Bellido, V. Gavrilov, P. Gay, W. Geist, D. Gelé, C. E. Gerber, Y. Gershtein, D. Gillberg, G. Ginther, N. Gollub, B. Gómez, A. Goussiou, P. D. Grannis, H. Greenlee, Z. D. Greenwood, E. M. Gregores, G. Grenier, Ph Gris, J. F. Grivaz, A. Grohsjean, S. Grünendahl, M. W. Grünewald, F. Guo, J. Guo, G. Gutierrez, P. Gutierrez, A. Haas, N. J. Hadley, P. Haefner, S. Hagopian, J. Haley, I. Hall, R. E. Hall, L. Han, K. Hanagaki, P. Hansson, K. Harder, A. Harel, R. Harrington, J. M. Hauptman, R. Hauser, J. Hays, T. Hebbeker, D. Hedin, J. G. Hegeman, J. M. Heinmiller, A. P. Heinson, U. Heintz, C. Hensel, K. Herner, G. Hesketh, M. D. Hildreth, R. Hirosky, J. D. Hobbs, B. Hoeneisen, H. Hoeth, M. Hohlfeld, S. J. Hong, R. Hooper, S. Hossain, P. Houben, Y. Hu, Z. Hubacek, V. Hynek, I. Iashvili, R. Illingworth, A. S. Ito, S. Jabeen, M. Jaffré, S. Jain, K. Jakobs, C. Jarvis, R. Jesik, K. Johns, C. Johnson, M. Johnson, A. Jonckheere, P. Jonsson, A. Juste, D. Käfer, S. Kahn, E. Kajfasz, A. M. Kalinin, J. M. Kalk, J. R. Kalk, S. Kappler, D. Karmanov, J. Kasper, P. Kasper, I. Katsanos, D. Kau, R. Kaur, V. Kaushik, R. Kehoe, S. Kermiche, N. Khalatyan, A. Khanov, A. Kharchilava, Y. M. Kharzheev, D. Khatidze, H. Kim, T. J. Kim, M. H. Kirby, M. Kirsch, B. Klima, J. M. Kohli, J. P. Konrath, M. Kopal, V. M. Korablev, B. Kothari, A. V. Kozelov, D. Krop, A. Kryemadhi, T. Kuhl, A. Kumar, S. Kunori, A. Kupco, T. Kurča, J. Kvita, D. Lam, S. Lammers, G. Landsberg, J. Lazoflores, P. Lebrun, W. M. Lee, A. Leflat, F. Lehner, J. Lellouch, V. Lesne, J. Leveque, P. Lewis, J. Li, L. Li, Q. Z. Li, S. M. Lietti, J. G.R. Lima, D. Lincoln, J. Linnemann, V. V. Lipaev, R. Lipton, Y. Liu, Z. Liu, L. Lobo, A. Lobodenko, M. Lokajicek, A. Lounis, P. Love, H. J. Lubatti, A. L. Lyon, A. K.A. MacIel, D. MacKin, R. J. Madaras, P. Mättig, C. Magass, A. Magerkurth, N. Makovec, P. K. Mal, H. B. Malbouisson, S. Malik, V. L. Malyshev, H. S. Mao, Y. Maravin, B. Martin, R. McCarthy, A. Melnitchouk, A. Mendes, L. Mendoza, P. G. Mercadante, M. Merkin, K. W. Merritt, A. Meyer, J. Meyer, M. Michaut, T. Millet, J. Mitrevski, J. Molina, R. K. Mommsen, N. K. Mondal, R. W. Moore, T. Moulik, G. S. Muanza, M. Mulders, M. Mulhearn, O. Mundal, L. Mundim, E. Nagy, M. Naimuddin, M. Narain, N. A. Naumann, H. A. Neal, J. P. Negret, P. Neustroev, H. Nilsen, C. Noeding, A. Nomerotski, S. F. Novaes, T. Nunnemann, V. O'Dell, D. C. O'Neil, G. Obrant, C. Ochando, D. Onoprienko, N. Oshima, J. Osta, R. Otec, G. J. Otero Y Garzón, M. Owen, P. Padley, M. Pangilinan, N. Panikashvili, N. Parashar, S. J. Park, S. K. Park, J. Parsons, R. Partridge, N. Parua, A. Patwa, G. Pawloski, P. M. Perea, K. Peters, Y. Peters, P. Pétroff, M. Petteni, R. Piegaia, J. Piper, M. A. Pleier, P. L.M. Podesta-Lerma, V. M. Podstavkov, Y. Pogorelov, M. 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Stoyanova, J. Strandberg, S. Strandberg, M. A. Strang, M. Strauss, R. Ströhmer, D. Strom, M. Strovink, L. Stutte, S. Sumowidagdo, P. Svoisky, A. Sznajder, M. Talby, P. Tamburello, A. Tanasijczuk, W. Taylor, P. Telford, J. Temple, B. Tiller, F. Tissandier, M. Titov, V. V. Tokmenin, M. Tomoto, T. Toole, I. Torchiani, T. Trefzger, D. Tsybychev, B. Tuchming, C. Tully, P. M. Tuts, R. Unalan, L. Uvarov, S. Uvarov, S. Uzunyan, B. Vachon, P. J. Van Den Berg, B. Van Eijk, R. Van Kooten, W. M. Van Leeuwen, N. Varelas, E. W. Varnes, A. Vartapetian, I. A. Vasilyev, M. Vaupel, P. Verdier, L. S. Vertogradov, M. Verzocchi, F. Villeneuve-Seguier, P. Vint, E. Von Toerne, M. Voutilainen, M. Vreeswijk, R. Wagner, H. D. Wahl, L. Wang, M. H.L.S. Wang, J. Warchol, G. Watts, M. Wayne, G. Weber, M. Weber, H. Weerts, A. Wenger, N. Wermes, M. Wetstein, A. White, D. Wicke, G. W. Wilson, S. J. Wimpenny, M. Wobisch, D. R. Wood, T. R. Wyatt, Y. Xie, S. Yacoob, R. Yamada, M. Yan, T. Yasuda, Y. A. Yatsunenko, K. Yip, H. D. Yoo, S. W. Youn, C. Yu, J. Yu, A. Yurkewicz, A. Zatserklyaniy, C. Zeitnitz, D. Zhang, T. Zhao, B. Zhou, J. Zhu, M. Zielinski, D. Zieminska, A. Zieminski, L. Zivkovic, V. Zutshi, E. G. Zverev

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    28 Citations (Scopus)

    Abstract

    We have measured the Λb lifetime using the exclusive decay Λb→J/ψΛ, based on 1.2fb-1 of data collected with the D0 detector during 2002-2006. From 171 reconstructed Λb decays, where the J/ψ and Λ are identified via the decays J/ψ→μ+μ- and Λ→pπ, we measured the Λb lifetime to be τ(Λb)=1.218-0.115+0.130(stat)±0.042(syst)ps. We also measured the B0 lifetime in the decay B0→J/ψ(μ+μ-)KS0(π+π-) to be τ(B0)=1.501-0.074+0.078(stat)±0.050(syst)ps, yielding a lifetime ratio of τ(Λb)/τ(B0)=0.811-0.087+0.096(stat)±0.034(syst).

    Original languageEnglish
    Article number142001
    JournalPhysical review letters
    Volume99
    Issue number14
    DOIs
    Publication statusPublished - 2007 Oct 1

    Bibliographical note

    Funding Information:
    This work was supported by The Francis Crick Institute, which receives its core funding from Cancer Research UK (FC001202), the UK Medical Research Council (FC001202) and the Wellcome Trust (FC001202) (M.T. and P.V.L.). M.T. is supported as a postdoctoral fellow by the European Union’s Horizon 2020 research and innovation program (Marie Skłodowska-Curie Grant agreement no. 747852-SIOMICS). P.V.L. is a Winton Group Leader in recognition of the Winton Charitable Foundation’s support toward the establishment of The Francis Crick Institute. I.M. is funded by a Cancer Research UK Career Development Fellowship (C57387/A21777). D.C.W. is funded by the Li Ka Shing Foundation. This work was supported by grant 1U24CA210957 to P.T.S.. F.M. acknowledges support from the University of Cambridge, Cancer Research UK and Hutchison Whampoa Limited. Parts of this work were funded by Cancer Research UK core grant C14303/A17197 (F.M.). This project was enabled through access to the MRC eMedLab Medical Bioinformatics infrastructure, supported by the UK Medical Research Council (grant no. MR/ L016311/1) (M.T. and P.V.L.). Parts of the results published here are based on data generated by the TCGA Research Network (http://cancergenome.nih.gov/).

    Funding Information:
    A.S. is supported by the Chris Rokos Fellowship in Evolution and Cancer and by Cancer Research UK (A22909). T.A.G. is supported by Cancer Research UK (A19771). C.P.B. is supported by the Wellcome Trust (097319/Z/11/Z). B.W. is supported by a Geoffrey W. Lewis Post-Doctoral Training fellowship. A.S. and T.A.G. are jointly supported by the Wellcome Trust (202778/B/16/Z and 202778/Z/16/Z, respectively). This work was also supported by Wellcome Trust funding to the Centre for Evolution and Cancer (105104/Z/14/Z).

    ASJC Scopus subject areas

    • General Physics and Astronomy

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