Measurement of jet multiplicity distributions in t(t)over-bar production in pp collisions at root s=7TeV

Journal article

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(Formula presented.) 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(Formula presented.). Using a procedure to associate jets to decay products of the top quarks, the differential cross section of the (Formula presented.) 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.

Authors: Chatrchyan, S; Chatrchyan, S; Khachatryan, V; Sirunyan, A; Tumasyan, A

• Publication status: Published
• Publisher: Springer New York LLC
• Journal: EUROPEAN PHYSICAL JOURNAL C
• Volume: 74
• Issue: 8
• Pages: 1-29
• Publication date: 2014-08-20
• DOI: 10.1140/epjc/s10052-014-3014-0
• EISSN: 1434-6052
• ISSN: 1434-6044
• Language: English