@article{4ba15d31c9eb450fb89746a94e7d4e87,
title = "Observation of J/psi-pair production in pp collisions at root s=7 TeV",
abstract = "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",
author = "R Aaij and {van den Brand}, J.F.J. and T.J. Ketel and M.H.M. Merk and H.G. Raven and Collaboration LHCb",
year = "2012",
doi = "10.1016/j.physletb.2011.12.015",
language = "English",
volume = "707",
pages = "52--59",
journal = "Physics Letters B",
issn = "0370-2693",
publisher = "Elsevier B.V.",
number = "1",
}
