https://doi.org/10.1140/epjc/s10052-011-1645-y
Regular Article - Experimental Physics
Measurement of J/Ψ production in pp collisions at 
TeV
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, Firenze, Italy
18
Laboratori Nazionali dell’INFN di Frascati, Frascati, Italy
19
Sezione INFN di Genova, Genova, Italy
20
Sezione INFN di Milano Bicocca, Milano, Italy
21
Sezione INFN di Roma Tor Vergata, Roma, Italy
22
Sezione INFN di Roma Sapienza, Roma, Italy
23
Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands
24
Nikhef National Institute for Subatomic Physics and Vrije Universiteit, Amsterdam, Netherlands
25
Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Cracow, Poland
26
Faculty of Physics & Applied Computer Science, Cracow, Poland
27
Soltan Institute for Nuclear Studies, 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 (BINP), 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, Zürich, Switzerland
40
NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine
41
Institute for Nuclear Research of the National Academy of Sciences (KINR), Kyiv, Ukraine
42
H.H. Wills Physics Laboratory, University of Bristol, Bristol, UK
43
Cavendish Laboratory, University of Cambridge, Cambridge, UK
44
Department of Physics, University of Warwick, Coventry, UK
45
STFC Rutherford Appleton Laboratory, Didcot, UK
46
School of Physics and Astronomy, University of Edinburgh, Edinburgh, UK
47
School of Physics and Astronomy, University of Glasgow, Glasgow, UK
48
Oliver Lodge Laboratory, University of Liverpool, Liverpool, UK
49
Imperial College London, London, UK
50
School of Physics and Astronomy, University of Manchester, Manchester, UK
51
Department of Physics, University of Oxford, Oxford, UK
52
Syracuse University, Syracuse, NY, USA
53
CC-IN2P3, CNRS/IN2P3, Lyon-Villeurbanne, France
54
Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil
* e-mail: robbe@lal.in2p3.fr
Received:
2
March
2011
Revised:
6
April
2011
Published online:
19
May
2011
The production of 
mesons in proton–proton collisions at 
is studied with the LHCb detector at the LHC. The differential cross-section for prompt production is measured as a function of the transverse momentum pT and rapidity y in the fiducial region ![${\ensuremath{p_{\mathrm{T}}}}\in[0;14]{\ensuremath{~\mathrm{GeV}\mskip-2mu/\mskip-1mu c}}$](/articles/epjc/abs/2011/05/10052_2011_Article_1645/10052_2011_Article_1645_tex_eq6.png)
and y∈[2.0;4.5]. The differential cross-section and fraction of from b-hadron decays are also measured in the same pT and y ranges. The analysis is based on a data sample corresponding to an integrated luminosity of 5.2 pb−1. The measured cross-sections integrated over the fiducial region are [InlineEquation not available: see fulltext.] for prompt 
production and [InlineEquation not available: see fulltext.] for from b-hadron decays, where the first uncertainty is statistical and the second systematic. The prompt production cross-section is obtained assuming no polarisation and the third error indicates the acceptance uncertainty due to this assumption.
© Springer-Verlag / Società Italiana di Fisica, 2011
