The production of J/ψ 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 J/ψ in the rapidity range 2 <4.5 and transverse momentum p TJ/ψ<10 GeV/c is σ J/ψJ/ψ=5.1±1.0±1.1 nb, where the first uncertainty is statistical and the second systematic. © 2011 CERN.
CITATION STYLE
Aaij, R., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., Ajaltouni, Z., … Zvyagin, A. (2012). Observation of J/ψ-pair production in pp collisions at √s=7 TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 707(1), 52–59. https://doi.org/10.1016/j.physletb.2011.12.015
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