Measurement of ϒ production in pp collisions at √s =7 TeV

The LHCb collaboration

doi:10.1140/epjc/s10052-012-2025-y

Measurement of ϒ production in pp collisions at √s =7 TeV

The LHCb collaboration

European Organization for Nuclear Research
Science Park 105
University of Barcelona
Universitat Ramon LLull - CSIC
University Santiago de Compostela
University of Bristol
Aix Marseille Université
University of Liverpool
Clermont-Auvergne University
University of Glasgow
Petersburg Nuclear Physics Institute (PNPI)
Sezione di Roma
Instituto de Biofisica da UFRJ
ENAC-IIC-GEL
University of Zurich
University of Manchester
Max-Planck-Institut für Kernphysik
LNF-INFN
Université Paris-Sud
Kurchatov Institute
Syracuse University
Università degli Studi della Basilicata
University of Heidelberg
University of Warwick
Institute for Theoretical and Experimental Physics
Sezione INFN di Ferrara
Université Paris-Saclay
University of Cambridge
Centro Brasileiro de Pesquisas Fisicas
Sorbonne Université
University of Edinburgh
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
University College Dublin
University of Modena and Reggio Emilia
Imperial College London
Budker Institute of Nuclear Physics of the Siberian Branch of the RAS
Novosibirsk State University
Sezione INFN di Cagliari
University of Dortmund
Vrije Universiteit Amsterdam
Horia Hulubei National Institute of Physics and Nuclear Engineering
INFN Sezione di Milano-Bicocca
University of Milano-Bicocca
INFN Sezione di Bologna
University of Rome “Tor Vergata”
Sezione di Genova
University of Genoa
University of Oxford
Université Savoie Mont Blanc
Kharkov Institute of Physics and Technology
Institute for Nuclear Physics
CCLRC Rutherford Appleton Laboratory
University of Birmingham
University of Ferrara
Institute for Nuclear Research of the Russian Academy of Sciences
University of Florence
University of Bologna
Tsinghua University
Pontifícia Universidade Católica do Rio de Janeiro
Universität Rostock
Institute of Nuclear Research, National Academy of Sciences in Ukraine
Moscow State University
Universitá di Cagliari
INFN Sezione di Bari
Agh University of Science and Technology Faculty of Computer Science
Hanoi University of Science
Università degli studi di Bari Aldo Moro
University of Rome
Soltan Institute for Nuclear Studies
University of Urbino Carlo Bo
P.N. Lebedev Physical Institute of the Russian Academy of Sciences

Research output: Contribution to journal › Article › peer-review

120 Citations (Scopus)

Abstract

The production of ϒ (1S), ϒ (2S) and ϒ (3S) mesons in proton-proton collisions at the centre-of-mass energy of √s = 7 TeV is studied with the LHCb detector. The analysis is based on a data sample of 25 pb⁻¹ collected at the Large Hadron Collider. The ϒ mesons are reconstructed in the decay mode ϒ →μ ⁺ μ ⁻ and the signal yields are extracted from a fit to the μ ⁺ μ ⁻ invariant mass distributions. The differential production cross-sections times dimuon branching fractions are measured as a function of the ϒ transverse momentum p_T and rapidity y, over the range p_T < 15 GeV/c and 2.0<y <4.5. The cross-sections times branching fractions, integrated over these kinematic ranges, are measured to be σ(pp→ϒ (1S)X)×B(ϒ (1S)→μ ⁺ μ ⁻) = 2.29 ± 0.01 ± 0.10^+0.19 _−0.37 nb, σ(pp→ϒ (2S)X)×B(ϒ (2S)→μ ⁺ μ ⁻) = 0.562±0.007±0.023^+0.048 _−0.092 nb, σ(pp→ϒ (3S)X)×B(ϒ (3S)→μ ⁺ μ ⁻) = 0.283±0.005±0.012^+0.025 _−0.048 nb, where the first uncertainty is statistical, the second systematic and the third is due to the unknown polarisation of the three ϒ states.

Original language	English
Article number	2025
Journal	European Physical Journal C
Volume	72
Issue number	6
DOIs	https://doi.org/10.1140/epjc/s10052-012-2025-y
Publication status	Published - 7 Jun 2012
Externally published	Yes

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@article{ce3b29776ff349ce9914b7350fd58fed,

title = "Measurement of ϒ production in pp collisions at √s =7 TeV",

abstract = "The production of ϒ (1S), ϒ (2S) and ϒ (3S) mesons in proton-proton collisions at the centre-of-mass energy of √s = 7 TeV is studied with the LHCb detector. The analysis is based on a data sample of 25 pb−1 collected at the Large Hadron Collider. The ϒ mesons are reconstructed in the decay mode ϒ →μ + μ − and the signal yields are extracted from a fit to the μ + μ − invariant mass distributions. The differential production cross-sections times dimuon branching fractions are measured as a function of the ϒ transverse momentum pT and rapidity y, over the range pT < 15 GeV/c and 2.0+ μ −) = 2.29 ± 0.01 ± 0.10+0.19 −0.37 nb, σ(pp→ϒ (2S)X){\texttimes}B(ϒ (2S)→μ + μ −) = 0.562±0.007±0.023+0.048 −0.092 nb, σ(pp→ϒ (3S)X){\texttimes}B(ϒ (3S)→μ + μ −) = 0.283±0.005±0.012+0.025 −0.048 nb, where the first uncertainty is statistical, the second systematic and the third is due to the unknown polarisation of the three ϒ states.",

author = "\{The LHCb collaboration\} and R. Aaij and Beteta, \{C. Abellan\} and B. Adeva and M. Adinolfi and C. Adrover and A. Affolder and Z. Ajaltouni and J. Albrecht and F. Alessio and M. Alexander and G. Alkhazov and Cartelle, \{P. Alvarez\} and Alves, \{A. A.\} and S. Amato and Y. Amhis and J. Anderson and Appleby, \{R. B.\} and Gutierrez, \{O. Aquines\} and F. Archilli and L. Arrabito and A. Artamonov and M. Artuso and E. Aslanides and G. Auriemma and S. Bachmann and Back, \{J. J.\} and Bailey, \{D. S.\} and V. Balagura and W. Baldini and Barlow, \{R. J.\} and C. Barschel and S. Barsuk and W. Barter and A. Bates and C. Bauer and Th Bauer and A. Bay and I. Bediaga and S. Belogurov and K. Belous and I. Belyaev and E. Ben-Haim and M. Benayoun and G. Bencivenni and S. Benson and J. Benton and R. Bernet and Bettler, \{M. O.\} and \{Van Beuzekom\}, M. and E. Maurice",

note = "Publisher Copyright: {\textcopyright} 2012 CERN for the benefit of the LHCb collaboration.",

year = "2012",

month = jun,

day = "7",

doi = "10.1140/epjc/s10052-012-2025-y",

language = "English",

volume = "72",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer Nature",

number = "6",

}

TY - JOUR

T1 - Measurement of ϒ production in pp collisions at √s =7 TeV

AU - The LHCb collaboration

AU - Aaij, R.

AU - Beteta, C. Abellan

AU - Adeva, B.

AU - Adinolfi, M.

AU - Adrover, C.

AU - Affolder, A.

AU - Ajaltouni, Z.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Alkhazov, G.

AU - Cartelle, P. Alvarez

AU - Alves, A. A.

AU - Amato, S.

AU - Amhis, Y.

AU - Anderson, J.

AU - Appleby, R. B.

AU - Gutierrez, O. Aquines

AU - Archilli, F.

AU - Arrabito, L.

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Auriemma, G.

AU - Bachmann, S.

AU - Back, J. J.

AU - Bailey, D. S.

AU - Balagura, V.

AU - Baldini, W.

AU - Barlow, R. J.

AU - Barschel, C.

AU - Barsuk, S.

AU - Barter, W.

AU - Bates, A.

AU - Bauer, C.

AU - Bauer, Th

AU - Bay, A.

AU - Bediaga, I.

AU - Belogurov, S.

AU - Belous, K.

AU - Belyaev, I.

AU - Ben-Haim, E.

AU - Benayoun, M.

AU - Bencivenni, G.

AU - Benson, S.

AU - Benton, J.

AU - Bernet, R.

AU - Bettler, M. O.

AU - Van Beuzekom, M.

AU - Maurice, E.

PY - 2012/6/7

Y1 - 2012/6/7

N2 - The production of ϒ (1S), ϒ (2S) and ϒ (3S) mesons in proton-proton collisions at the centre-of-mass energy of √s = 7 TeV is studied with the LHCb detector. The analysis is based on a data sample of 25 pb−1 collected at the Large Hadron Collider. The ϒ mesons are reconstructed in the decay mode ϒ →μ + μ − and the signal yields are extracted from a fit to the μ + μ − invariant mass distributions. The differential production cross-sections times dimuon branching fractions are measured as a function of the ϒ transverse momentum pT and rapidity y, over the range pT < 15 GeV/c and 2.0+ μ −) = 2.29 ± 0.01 ± 0.10+0.19 −0.37 nb, σ(pp→ϒ (2S)X)×B(ϒ (2S)→μ + μ −) = 0.562±0.007±0.023+0.048 −0.092 nb, σ(pp→ϒ (3S)X)×B(ϒ (3S)→μ + μ −) = 0.283±0.005±0.012+0.025 −0.048 nb, where the first uncertainty is statistical, the second systematic and the third is due to the unknown polarisation of the three ϒ states.

AB - The production of ϒ (1S), ϒ (2S) and ϒ (3S) mesons in proton-proton collisions at the centre-of-mass energy of √s = 7 TeV is studied with the LHCb detector. The analysis is based on a data sample of 25 pb−1 collected at the Large Hadron Collider. The ϒ mesons are reconstructed in the decay mode ϒ →μ + μ − and the signal yields are extracted from a fit to the μ + μ − invariant mass distributions. The differential production cross-sections times dimuon branching fractions are measured as a function of the ϒ transverse momentum pT and rapidity y, over the range pT < 15 GeV/c and 2.0+ μ −) = 2.29 ± 0.01 ± 0.10+0.19 −0.37 nb, σ(pp→ϒ (2S)X)×B(ϒ (2S)→μ + μ −) = 0.562±0.007±0.023+0.048 −0.092 nb, σ(pp→ϒ (3S)X)×B(ϒ (3S)→μ + μ −) = 0.283±0.005±0.012+0.025 −0.048 nb, where the first uncertainty is statistical, the second systematic and the third is due to the unknown polarisation of the three ϒ states.

U2 - 10.1140/epjc/s10052-012-2025-y

DO - 10.1140/epjc/s10052-012-2025-y

M3 - Article

AN - SCOPUS:84937645917

SN - 1434-6044

VL - 72

JO - European Physical Journal C

JF - European Physical Journal C

IS - 6

M1 - 2025

ER -

Measurement of ϒ production in pp collisions at √s =7 TeV

Abstract

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