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URN: urn:nbn:de:swb:90-453277
Originalveröffentlichung
DOI: 10.1007/JHEP09(2014)094
Scopus
Zitationen: 34
Web of Science
Zitationen: 22

Measurement of prompt J$\psi$ pair production in pp collisions at $\sqrt$ s = 7 Tev

Khachatryan, V.; Sirunyan, A.M.; Tumasyan, A.; Adam, W.; Bergauer, T.; Dragicevic, M.; Erö, J.; Fabjan, C.; Friedl, M.; Frühwirth, R.; Ghete, V.M.; Hartl, C.; Hörmann, N.; Hrubec, J.; Jeitler, M.; Kiesenhofer, W.; Knünz, V.; Krammer, M.; Krätschmer, I.; Liko, D.; ... mehr

Abstract:
Production of prompt J/ &#968; meson pairs in proton-proton collisions at s s&#8730; = 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 &#8722;1 . The two J/ &#968; mesons are fully reconstructed via their decays into &#956; + &#956; &#8722; pairs. This observation provides for the first time access to the high-transverse-momentum region of J/ &#968; 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/ &#968; transverse momentum ( p T J/ &#968; ) and rapidity (| y J/ &#968; |): | y J/ &#968; | < 1.2 for p T J/ &#968; > 6.5 GeV/ c ; 1.2 < | y J/ &#968; | < 1.43 for a p T threshold that scales linearly with | y J/ &#968; | from 6.5 to 4.5 GeV/ c ; and 1.43 < | y J/ &#968; | < 2.2 for p T J/ &#968; > 4.5 GeV/ c . The total cross section, assuming unpolarized prompt J/ &#968; pair production is 1.49 ± 0.07 (stat) ±0.13 (syst) nb. Different assumptions about ... mehr


Zugehörige Institution(en) am KIT Institut für Experimentelle Kernphysik (IEKP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2014
Sprache Englisch
Identifikator ISSN: 1029-8479
KITopen ID: 1000045327
Erschienen in Journal of High Energy Physics
Band 2014
Heft 9
Seiten 94
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
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