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dc.contributor.authorCMS Collaboration
dc.contributor.authorBean, Alice
dc.date.accessioned2015-12-21T17:13:32Z
dc.date.available2015-12-21T17:13:32Z
dc.date.issued2014-09
dc.identifier.citationThe CMS Collaboration. "Measurement of Prompt J/ψ Pair Production in Pp Collisions at S√ = 7 Tev." Journal of High Energy Physics 5.9 (2014). http://dx.doi.org/10.1007/JHEP09(2014)094en_US
dc.identifier.urihttp://hdl.handle.net/1808/19298
dc.descriptionThis is the published version.en_US
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.publisherSpringer Verlagen_US
dc.subjectHadron-Hadron Scatteringen_US
dc.subjectB physicsen_US
dc.titleMeasurement of prompt J/ψ pair production in pp collisions at √s = 7 Teven_US
dc.typeArticle
kusw.kuauthorBean, Alice
kusw.kudepartmentPhysics and Astronomyen_US
dc.identifier.doi10.1007/JHEP09(2014)094
kusw.oaversionScholarly/refereed, publisher version
kusw.oapolicyThis item meets KU Open Access policy criteria.
dc.rights.accessrightsopenAccess


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