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Measurement of jet multiplicity distributions in tt¯ production in pp collisions at vs = 7TeV

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.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Fuente: European Physical Journal C, Vol. 74, Num. 8, Art. Num. 3014, (2014)

Editorial: Springer New York LLC

 Fecha de publicación: 01/08/2014

Nº de páginas: 29

Tipo de publicación: Artículo de Revista

 DOI: 10.1140/epjc/s10052-014-3014-0

ISSN: 1434-6044,1434-6052

Proyecto español: FPA2014-55295-C3-1-R ; FPA 2011-28694-C02-01

Url de la publicación: https://doi.org/10.1140/epjc/s10052-014-3014-0