Phys. Rev. Lett.
95,
171801
(2005)
[7 pages]
Measurement of the Lifetime Difference in the Bs0 System
V. M. Abazov et al. D0 Collaboration
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V. M. Abazov35, B. Abbott72, M. Abolins63, B. S. Acharya29, M. Adams50, T. Adams48, M. Agelou18, J.-L. Agram19, S. H. Ahn31, M. Ahsan57, G. D. Alexeev35, G. Alkhazov39, A. Alton62, G. Alverson61, G. A. Alves2, M. Anastasoaie34, T. Andeen52, S. Anderson44, B. Andrieu17, Y. Arnoud14, M. Arov51, A. Askew48, B. Åsman40, A. C. S. Assis Jesus3, O. Atramentov55, C. Autermann21, C. Avila8, F. Badaud13, A. Baden59, L. Bagby51, B. Baldin49, P. W. Balm33, P. Banerjee29, S. Banerjee29, E. Barberis61, P. Bargassa76, P. Baringer56, C. Barnes42, J. Barreto2, J. F. Bartlett49, U. Bassler17, D. Bauer53, A. Bean56, S. Beauceron17, M. Begalli3, M. Begel68, A. Bellavance65, S. B. Beri27, G. Bernardi17, R. Bernhard49,*, I. Bertram41, M. Besançon18, R. Beuselinck42, V. A. Bezzubov38, P. C. Bhat49, V. Bhatnagar27, M. Binder25, C. Biscarat41, K. M. Black60, I. Blackler42, G. Blazey51, F. Blekman42, S. Blessing48, D. Bloch19, U. Blumenschein23, A. Boehnlein49, O. Boeriu54, T. A. Bolton57, F. Borcherding49, G. 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Taylor5, P. Telford43, J. Temple44, M. Titov23, M. Tomoto49, T. Toole59, J. Torborg58, S. Towers69, T. Trefzger24, S. Trincaz-Duvoid17, D. Tsybychev69, B. Tuchming18, C. Tully66, A. S. Turcot43, P. M. Tuts67, L. Uvarov39, S. Uvarov39, S. Uzunyan51, B. Vachon5, P. J. van den Berg33, R. Van Kooten53, W. M. van Leeuwen33, N. Varelas50, E. W. Varnes44, A. Vartapetian74, I. A. Vasilyev38, M. Vaupel26, P. Verdier20, L. S. Vertogradov35, M. Verzocchi49, F. Villeneuve-Seguier42, J.-R. Vlimant17, E. Von Toerne57, M. Vreeswijk33, T. Vu Anh16, H. D. Wahl48, L. Wang59, J. Warchol54, G. Watts78, M. Wayne54, M. Weber49, H. Weerts63, N. Wermes22, M. Wetstein59, A. White74, V. White49, D. Wicke49, D. A. Wijngaarden34, G. W. Wilson56, S. J. Wimpenny47, J. Wittlin60, M. Wobisch49, J. Womersley49, D. R. Wood61, T. R. Wyatt43, Y. Xie73, Q. Xu62, N. Xuan54, S. Yacoob52, R. Yamada49, M. Yan59, T. Yasuda49, Y. A. Yatsunenko35, Y. Yen26, K. Yip70, H. D. Yoo73, S. W. Youn52, J. Yu74, A. Yurkewicz69, A. Zabi16, A. Zatserklyaniy51, M. Zdrazil69, C. Zeitnitz24, D. Zhang49, X. Zhang72, T. Zhao78, Z. Zhao62, B. Zhou62, J. Zhu69, M. Zielinski68, D. Zieminska53, A. Zieminski53, R. Zitoun69, V. Zutshi51, and E. G. Zverev37 (D0 Collaboration)
1Universidad de Buenos Aires, Buenos Aires, Argentina
2Centro Brasileiro de Pesquisas Físicas, LAFEX, Rio de Janeiro, Brazil
3Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
4Instituto de Física Teórica, Universidade Estadual Paulista, São Paulo, Brazil
5University of Alberta, Edmonton, Alberta, Canada, Simon Fraser University, Burnaby, British Columbia, Canada, York University, Toronto, Ontario, Canada, and McGill University, Montreal, Quebec, Canada
6Institute of High Energy Physics, Beijing, People’s Republic of China
7University of Science and Technology of China, Hefei, People’s Republic of China
8Universidad de los Andes, Bogotá, Colombia
9Center for Particle Physics, Charles University, Prague, Czech Republic
10Czech Technical University, Prague, Czech Republic
11Center for Particle Physics, Institute of Physics, Academy of Sciences of the Czech Republic, Prague, Czech Republic 12
12Universidad San Francisco de Quito, Quito, Ecuador
13Laboratoire de Physique Corpusculaire, IN2P3-CNRS, Université Blaise Pascal, Clermont-Ferrand, France
14Laboratoire de Physique Subatomique et de Cosmologie, IN2P3-CNRS, Universite de Grenoble 1, Grenoble, France
15CPPM, IN2P3-CNRS, Université de la Méditerranée, Marseille, France
16IN2P3-CNRS, Laboratoire de l’Accélérateur Linéaire, Orsay, France
17LPNHE, IN2P3-CNRS, Universités Paris VI and VII, Paris, France
18DAPNIA/Service de Physique des Particules, CEA, Saclay, France
19IReS, IN2P3-CNRS, Université Louis Pasteur, Strasbourg, France and Université de Haute Alsace, Mulhouse, France
20Institut de Physique Nucléaire de Lyon, IN2P3-CNRS, Université Claude Bernard, Villeurbanne, France
21III. Physikalisches Institut A, RWTH Aachen, Aachen, Germany
22Physikalisches Institut, Universität Bonn, Bonn, Germany
23Physikalisches Institut, Universität Freiburg, Freiburg, Germany
24Institut für Physik, Universität Mainz, Mainz, Germany
25Ludwig-Maximilians-Universität München, München, Germany
26Fachbereich Physik, University of Wuppertal, Wuppertal, Germany
27Panjab University, Chandigarh, India
28Delhi University, Delhi, India
29Tata Institute of Fundamental Research, Mumbai, India
30University College Dublin, Dublin, Ireland
31Korea Detector Laboratory, Korea University, Seoul, Korea
32CINVESTAV, Mexico City, Mexico
33FOM-Institute NIKHEF and University of Amsterdam/NIKHEF, Amsterdam, The Netherlands
34Radboud University Nijmegen/NIKHEF, Nijmegen, The Netherlands
35Joint Institute for Nuclear Research, Dubna, Russia
36Institute for Theoretical and Experimental Physics, Moscow, Russia
37Moscow State University, Moscow, Russia
38Institute for High Energy Physics, Protvino, Russia
39Petersburg Nuclear Physics Institute, St. Petersburg, Russia
40Lund University, Lund, Sweden, Royal Institute of Technology and Stockholm University, Stockholm, Sweden, and Uppsala University, Uppsala, Sweden
41Lancaster University, Lancaster, United Kingdom
42Imperial College, London, United Kingdom
43University of Manchester, Manchester, United Kingdom
44University of Arizona, Tucson, Arizona 85721, USA
45Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USA
46California State University, Fresno, California 93740, USA
47University of California, Riverside, California 92521, USA
48Florida State University, Tallahassee, Florida 32306, USA
49Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
50University of Illinois at Chicago, Chicago, Illinois 60607, USA
51Northern Illinois University, DeKalb, Illinois 60115, USA
52Northwestern University, Evanston, Illinois 60208, USA
53Indiana University, Bloomington, Indiana 47405, USA
54University of Notre Dame, Notre Dame, Indiana 46556, USA
55Iowa State University, Ames, Iowa 50011, USA
56University of Kansas, Lawrence, Kansas 66045, USA
57Kansas State University, Manhattan, Kansas 66506, USA
58Louisiana Tech University, Ruston, Louisiana 71272, USA
59University of Maryland, College Park, Maryland 20742, USA
60Boston University, Boston, Massachusetts 02215, USA
61Northeastern University, Boston, Massachusetts 02115, USA
62University of Michigan, Ann Arbor, Michigan 48109, USA
63Michigan State University, East Lansing, Michigan 48824, USA
64University of Mississippi, University, Mississippi 38677, USA
65University of Nebraska, Lincoln, Nebraska 68588, USA
66Princeton University, Princeton, New Jersey 08544, USA
67Columbia University, New York, New York 10027, USA
68University of Rochester, Rochester, New York 14627, USA
69State University of New York, Stony Brook, New York 11794, USA
70Brookhaven National Laboratory, Upton, New York 11973, USA
71Langston University, Langston, Oklahoma 73050, USA
72University of Oklahoma, Norman, Oklahoma 73019, USA
73Brown University, Providence, Rhode Island 02912, USA
74University of Texas, Arlington, Texas 76019, USA
75Southern Methodist University, Dallas, Texas 75275, USA
76Rice University, Houston, Texas 77005, USA
77University of Virginia, Charlottesville, Virginia 22901, USA
78University of Washington, Seattle, Washington 98195, USA
Received 20 July 2005; published 17 October 2005
We present a study of the decay Bs0→J/ψϕ. We obtain the CP-odd fraction in the final state at time zero, R⊥=0.16±0.10(stat)±0.02(syst), the average lifetime of the (Bs0, B̅ s0) system, τ̅ (Bs0)=1.39-0.16+0.13(stat)-0.02+0.01(syst) ps, and the relative width difference between the heavy and light mass eigenstates, ΔΓ/Γ̅ ≡(ΓL-ΓH)/Γ̅ =0.24-0.38+0.28(stat)-0.04+0.03(syst). With the additional constraint from the world average of the Bs0 lifetime measurements using semileptonic decays, we find τ̅ (Bs0)=1.39±0.06 ps and ΔΓ/Γ̅ =0.25-0.15+0.14. For the ratio of the Bs0 and B0 lifetimes we obtain τ̅ (Bs0)/τ(B0)=0.91±0.09(stat)±0.003(syst).
© 2005 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.171801
DOI:
10.1103/PhysRevLett.95.171801
PACS:
13.25.Hw, 11.30.Er, 14.40.Nd
*Visitor from University of Zurich, Zurich, Switzerland.
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