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Measurement of jet multiplicity distributions in (Formula presented.) production in pp collisions at (Formula presented.)

The CMS Collaboration [Hrsg.]; Chatrchyan, S.; 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.; ... mehr

Abstract:

The normalised differential top quark-antiquark production cross section is measured as a function of the jet multiplicity in proton-proton collisions at a centre-of-mass energy of 7 TeV at the LHC with the CMS detector. The measurement is performed in both the dilepton and lepton+jets decay channels using data corresponding to an integrated luminosity of 5.0 fb-1 . Using a procedure to associate jets to decay products of the top quarks, the differential cross section of the tt¯ production is determined as a function of the additional jet multiplicity in the lepton+jets channel. Furthermore, the fraction of events with no additional jets is measured in the dilepton channel, as a function of the threshold on the jet transverse momentum. The measurements are compared with predictions from perturbative quantum chromodynamics and no significant deviations are observed.


Volltext §
DOI: 10.5445/IR/1000044609
Originalveröffentlichung
DOI: 10.1140/epjc/s10052-014-3014-0
Scopus
Zitationen: 15
Web of Science
Zitationen: 16
Dimensions
Zitationen: 11
Cover der Publikation
Zugehörige Institution(en) am KIT Fakultät für Physik – Institut für Experimentelle Kernphysik (IEKP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2014
Sprache Englisch
Identifikator ISSN: 1434-6044
urn:nbn:de:swb:90-446098
KITopen-ID: 1000044609
Erschienen in European Physical Journal C
Verlag Springer-Verlag
Band 74
Heft 8
Seiten 1-29
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
Nachgewiesen in Dimensions
Scopus
Web of Science
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