https://doi.org/10.1140/epjc/s10052-014-2839-x
Regular Article - Experimental Physics
Measurement of the Bc+ meson lifetime using 
decays
1
Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil
2
Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
3
Center for High Energy Physics, Tsinghua University, Beijing, China
4
LAPP, Université de Savoie, CNRS/IN2P3, Annecy-Le-Vieux, France
5
Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand, France
6
CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille, France
7
LAL, Université Paris-Sud, CNRS/IN2P3, Orsay, France
8
LPNHE, Université Pierre et Marie Curie, Université Paris Diderot, CNRS/IN2P3, Paris, France
9
Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany
10
Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany
11
Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
12
School of Physics, University College Dublin, Dublin, Ireland
13
Sezione INFN di Bari, Bari, Italy
14
Sezione INFN di Bologna, Bologna, Italy
15
Sezione INFN di Cagliari, Cagliari, Italy
16
Sezione INFN di Ferrara, Ferrara, Italy
17
Sezione INFN di Firenze, Florence, Italy
18
Laboratori Nazionali dell’INFN di Frascati, Frascati, Italy
19
Sezione INFN di Genova, Genoa, Italy
20
Sezione INFN di Milano Bicocca, Milan, Italy
21
Sezione INFN di Padova, Padua, Italy
22
Sezione INFN di Pisa, Pisa, Italy
23
Sezione INFN di Roma Tor Vergata, Rome, Italy
24
Sezione INFN di Roma La Sapienza, Rome, Italy
25
Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland
26
Faculty of Physics and Applied Computer Science, AGH, University of Science and Technology, Kraków, Poland
27
National Center for Nuclear Research (NCBJ), Warsaw, Poland
28
Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania
29
Petersburg Nuclear Physics Institute (PNPI), Gatchina, Russia
30
Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia
31
Institute of Nuclear Physics, Moscow State University (SINP MSU), Moscow, Russia
32
Institute for Nuclear Research of the Russian Academy of Sciences (INR RAN), Moscow, Russia
33
Budker Institute of Nuclear Physics (SB RAS) and Novosibirsk State University, Novosibirsk, Russia
34
Institute for High Energy Physics (IHEP), Protvino, Russia
35
Universitat de Barcelona, Barcelona, Spain
36
Universidad de Santiago de Compostela, Santiago de Compostela, Spain
37
European Organization for Nuclear Research (CERN), Geneva, Switzerland
38
Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
39
Physik-Institut, Universität Zürich, Zurich, Switzerland
40
Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands
41
Nikhef National Institute for Subatomic Physics and VU University Amsterdam, Amsterdam, The Netherlands
42
NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine
43
Institute for Nuclear Research of the National Academy of Sciences (KINR), Kiev, Ukraine
44
University of Birmingham, Birmingham, UK
45
H.H. Wills Physics Laboratory, University of Bristol, Bristol, UK
46
Cavendish Laboratory, University of Cambridge, Cambridge, UK
47
Department of Physics, University of Warwick, Coventry, UK
48
STFC Rutherford Appleton Laboratory, Didcot, UK
49
School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
50
School of Physics and Astronomy, University of Glasgow, Glasgow, UK
51
Oliver Lodge Laboratory, University of Liverpool, Liverpool, UK
52
Imperial College London, London, UK
53
School of Physics and Astronomy, University of Manchester, Manchester, UK
54
Department of Physics, University of Oxford, Oxford, UK
55
Massachusetts Institute of Technology, Cambridge, MA, USA
56
University of Cincinnati, Cincinnati, OH, USA
57
University of Maryland, College Park, MD, USA
58
Syracuse University, Syracuse, NY, USA
59
Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil
60
Institut für Physik, Universität Rostock, Rostock, Germany
61
National Research Centre Kurchatov Institute, Moscow, Russia
62
KVI, University of Groningen, Groningen, The Netherlands
63
Celal Bayar University, Manisa, Turkey
64
CERN, 1211, Geneva 23, Switzerland
* e-mail: Lucio.Anderlini@cern.ch
Received:
27
January
2014
Accepted:
28
March
2014
Published online:
1
May
2014
The lifetime of the Bc+ meson is measured using semileptonic decays having a J/ψ meson and a muon in the final state. The data, corresponding to an integrated luminosity of 2 fb-1, are collected by the LHCb detector in pp collisions at a centre-of-mass energy of 8 TeV. The measured lifetime is
τ = 509±8±12 fs,
where the first uncertainty is statistical and the second is systematic.
© The Author(s), 2014
