# Observation of J/ψ p√air production in pp collisions at √s = 7 TeV

LHCb Collaboration; Anderson, J; Bernet, R; Büchler-Germann, A; Bursche, A; Chiapolini, N; De Cian, M; Müller, K; Palacios, J; Serra, N; Steinkamp, O; Straumann, U; van Tilburg, J; Vollhardt, A (2012). Observation of J/ψ p√air production in pp collisions at √s = 7 TeV. Physics Letters B, 707(1):52-59.

## Abstract

The production of $J/\psi$ pairs in proton-proton collisions at a centre-of-mass energy of 7 TeV has been observed using an integrated luminosity of $37.5 pb^{-1}$ collected with the LHCb detector. The production cross-section for pairs with both \jpsi in the rapidity range $2<y^{J/\psi}<4.5$ and transverse momentum $p_{T}^{J/\psi}<10 GeV/c$ is $$\sigma^{J/\psi J/\psi} = 5.1\pm1.0\pm1.1 nb,$$ where the first uncertainty is statistical and the second systematic.

## Abstract

The production of $J/\psi$ pairs in proton-proton collisions at a centre-of-mass energy of 7 TeV has been observed using an integrated luminosity of $37.5 pb^{-1}$ collected with the LHCb detector. The production cross-section for pairs with both \jpsi in the rapidity range $2<y^{J/\psi}<4.5$ and transverse momentum $p_{T}^{J/\psi}<10 GeV/c$ is $$\sigma^{J/\psi J/\psi} = 5.1\pm1.0\pm1.1 nb,$$ where the first uncertainty is statistical and the second systematic.

## Citations

74 citations in Web of Science®
66 citations in Scopus®

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Other titles: Observation of $J/ψ$ pair production in pp collisions at $\sqrt{s}=7 TeV$ Journal Article, refereed, original work 07 Faculty of Science > Physics Institute 530 Physics English 2012 14 Feb 2012 13:07 05 Apr 2016 15:34 Elsevier 0370-2693 (P) 1873-2445 (E) https://doi.org/10.1016/j.physletb.2011.12.015 http://arxiv.org/abs/1109.0963

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