https://doi.org/10.1140/epjc/s10052-016-4489-7
Regular Article - Experimental Physics
Search for Higgs-like bosons decaying into long-lived exotic particles
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 Savoie Mont-Blanc, 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 Pierreet Marie Curie, Université Paris Diderot, CNRS/IN2P3, Paris, France
9
I. Physikalisches Institut, RWTH Aachen University, Aachen, Germany
10
Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany
11
Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany
12
Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
13
School of Physics, University College Dublin, Dublin, Ireland
14
Sezione INFN di Bari, Bari, Italy
15
Sezione INFN di Bologna, Bologna, Italy
16
Sezione INFN di Cagliari, Cagliari, Italy
17
Sezione INFN di Ferrara, Ferrara, Italy
18
Sezione INFN di Firenze, Florence, Italy
19
Laboratori Nazionali dell’INFN di Frascati, Frascati, Italy
20
Sezione INFN di Genova, Genoa, Italy
21
Sezione INFN di Milano Bicocca, Milan, Italy
22
Sezione INFN di Milano, Milan, Italy
23
Sezione INFN di Padova, Padua, Italy
24
Sezione INFN di Pisa, Pisa, Italy
25
Sezione INFN di Roma Tor Vergata, Rome, Italy
26
Sezione INFN di Roma La Sapienza, Rome, Italy
27
Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland
28
Faculty of Physics and Applied Computer Science, AGH, University of Science and Technology, Kraków, Poland
29
National Center for Nuclear Research (NCBJ), Warsaw, Poland
30
Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania
31
Petersburg Nuclear Physics Institute (PNPI), Gatchina, Russia
32
Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia
33
Institute of Nuclear Physics, Moscow State University (SINP MSU), Moscow, Russia
34
Institute for Nuclear Research of the Russian Academy of Sciences (INR RAN), Moscow, Russia
35
Budker Institute of Nuclear Physics (SB RAS), Novosibirsk State University, Novosibirsk, Russia
36
Institute for High Energy Physics (IHEP), Protvino, Russia
37
Universitat de Barcelona, Barcelona, Spain
38
Universidad de Santiago de Compostela, Santiago de Compostela, Spain
39
European Organization for Nuclear Research (CERN), Geneva, Switzerland
40
Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
41
Physik-Institut, Universität Zürich, Zurich, Switzerland
42
Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands
43
Nikhef National Institute for Subatomic Physics, VU University Amsterdam, Amsterdam, The Netherlands
44
NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine
45
Institute for Nuclear Research of the National Academy of Sciences (KINR), Kyiv, Ukraine
46
University of Birmingham, Birmingham, UK
47
H.H. Wills Physics Laboratory, University of Bristol, Bristol, UK
48
Cavendish Laboratory, University of Cambridge, Cambridge, UK
49
Department of Physics, University of Warwick, Coventry, UK
50
STFC Rutherford Appleton Laboratory, Didcot, UK
51
School of Physics and Astronomy, University of Edinburgh, Edinburgh, UK
52
School of Physics and Astronomy, University of Glasgow, Glasgow, UK
53
Oliver Lodge Laboratory, University of Liverpool, Liverpool, UK
54
Imperial College London, London, UK
55
School of Physics and Astronomy, University of Manchester, Manchester, UK
56
Department of Physics, University of Oxford, Oxford, UK
57
Massachusetts Institute of Technology, Cambridge, MA, USA
58
University of Cincinnati, Cincinnati, OH, USA
59
University of Maryland, College Park, MD, USA
60
Syracuse University, Syracuse, NY, USA
61
Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil
62
University of Chinese Academy of Sciences, Beijing, China
63
Institute of Particle Physics, Central China Normal University, Wuhan, Hubei, China
64
Departamento de Fisica, Universidad Nacional de Colombia, Bogota, Colombia
65
Institut für Physik, Universität Rostock, Rostock, Germany
66
National Research Centre Kurchatov Institute, Moscow, Russia
67
Yandex School of Data Analysis, Moscow, Russia
68
Instituto de Fisica Corpuscular (IFIC), Universitat de Valencia-CSIC, Valencia, Spain
69
Van Swinderen Institute, University of Groningen, Groningen, The Netherlands
* e-mail: aurelio.bay@epfl.ch
Received:
13
September
2016
Accepted:
7
November
2016
Published online:
2
December
2016
A search is presented for massive long-lived particles, in the 20–60 
mass range with lifetimes between 5 and 100 
. The dataset used corresponds to 0.62
of proton-proton collision data collected by the LHCb detector at 
. The particles are assumed to be pair-produced by the decay of a Higgs-like boson with mass between 80 and 140 . No excess above the background expectation is observed and limits are set on the production cross-section as a function of the long-lived particle mass and lifetime and of the Higgs-like boson mass.
© CERN for the benefit of the LHCb collaboration, 2016
