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dc.contributor.authorBaarmand, Marc M.
dc.contributor.authorHohlmann, Marcus
dc.contributor.authorKalakhety, H.
dc.contributor.authorYumiceva, Francisco X.
dc.contributor.authorThe CMS Collaboration
dc.contributor.authorKhachatryan, Vardan
dc.contributor.authorSirunyan, A. M.
dc.contributor.authorTumasyan, A. R.
dc.contributor.authorAdam, Wolfgang
dc.contributor.authorBergauer, Thomas
dc.date.accessioned2015-01-26T16:33:03Z
dc.date.available2015-01-26T16:33:03Z
dc.date.issued2014-09
dc.identifier.citationKhachatryan, V., Sirunyan, A.M., Tumasyan, A.R., Adam, W., et al. (2014). Measurement of prompt J/ψ pair production in pp collisions at √s = 7 Tev. Journal of High Energy Physics, 9(2014) 94.en_US
dc.identifier.urihttp://hdl.handle.net/11141/463
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 (p T J/ψ ) and rapidity (|y J/ψ |): |y J/ψ | < 1.2 for p T J/ψ > 6.5 GeV/c; 1.2 < |y J/ψ | < 1.43 for a p T threshold that scales linearly with |y J/ψ | from 6.5 to 4.5 GeV/c; and 1.43 < |y J/ψ | < 2.2 for p T J/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.rightsThis is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.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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This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Except where otherwise noted, this item's license is described as This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.