dc.contributor.author | CMS Collaboration | |
dc.contributor.author | Bean, Alice | |
dc.date.accessioned | 2015-12-21T17:13:32Z | |
dc.date.available | 2015-12-21T17:13:32Z | |
dc.date.issued | 2014-09 | |
dc.identifier.citation | The 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)094 | en_US |
dc.identifier.uri | http://hdl.handle.net/1808/19298 | |
dc.description | This is the published version. | en_US |
dc.description.abstract | Production 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.publisher | Springer Verlag | en_US |
dc.subject | Hadron-Hadron Scattering | en_US |
dc.subject | B physics | en_US |
dc.title | Measurement of prompt J/ψ pair production in pp collisions at √s = 7 Tev | en_US |
dc.type | Article | |
kusw.kuauthor | Bean, Alice | |
kusw.kudepartment | Physics and Astronomy | en_US |
dc.identifier.doi | 10.1007/JHEP09(2014)094 | |
kusw.oaversion | Scholarly/refereed, publisher version | |
kusw.oapolicy | This item meets KU Open Access policy criteria. | |
dc.rights.accessrights | openAccess | |