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dc.contributor.authorKhachatryan, Vardan
dc.contributor.authorSirunyan, A.M.
dc.contributor.authorTumasyan, A.R.
dc.contributor.authorAdam, Wolfgang
dc.contributor.authorBergauer, Thomas
dc.contributor.authorDragicevic, Marko
dc.contributor.authorBaarmand, Marc M.
dc.contributor.authorHohlmann, Marcus
dc.contributor.authorKalakhety, Himali
dc.contributor.authorYumiceva, Francisco
dc.date.accessioned2016-08-16T16:42:12Z
dc.date.available2016-08-16T16:42:12Z
dc.date.issued2014-09-17
dc.identifier.citationThe CMS collaboration, Khachatryan, V., Sirunyan, A.M. et al. J. High Energ. Phys. (2014) 2014: 94. doi:10.1007/JHEP09(2014)094en_US
dc.identifier.urihttp://hdl.handle.net/11141/973
dc.description.abstractProduction of prompt J/ψ meson pairs in proton-proton collisions at √s = 7 TeV is measured with the CMS experiment at the LHC in a data sample corresponding to an integrated luminosity of about 4.7 fb−1. The two J/ψ mesons are fully reconstructed via their decays into μ+μ− pairs. This observation provides for the first time access to the high-transverse-momentum region of J/ψ pair production where model predictions are not yet established. The total and differential cross sections are measured in a phase space defined by the individual J/ψ transverse momentum (pTJ/ψ) and rapidity (|yJ/ψ|): |yJ/ψ | < 1.2 for pTJ/ψ > 6.5 GeV/c; 1.2 < |yJ/ψ| < 1.43 for a pT threshold that scales linearly with |yJ/ψ| from 6.5 to 4.5 GeV/c; and 1.43 < |yJ/ψ| < 2.2 for pTJ/ψ > 4.5 GeV/c. The total cross section, assuming unpolarized prompt J/ψ pair production is 1.49 ± 0.07 (stat) ±0.13 (syst) nb. Different assumptions about the J/ψ polarization imply modifications to the cross section ranging from −31% to +27%.en_US
dc.language.isoen_USen_US
dc.rightsThe Journal of High Energy Physics (JHEP) is an open-access journal funded by SCOAP3 (scoap3.org) and licensed under CC BY 4.0.en_US
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en_US
dc.titleMeasurement of prompt J/ψ pair production in pp collisions at √s = 7 Teven_US
dc.typeArticleen_US
dc.identifier.doi10.1007/JHEP09(2014)094


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The Journal of High Energy Physics (JHEP) is an open-access journal funded by SCOAP3 (scoap3.org) and licensed under CC BY 4.0.
Except where otherwise noted, this item's license is described as The Journal of High Energy Physics (JHEP) is an open-access journal funded by SCOAP3 (scoap3.org) and licensed under CC BY 4.0.