The top-antitop quark (tt¯) production cross section is measured in proton-proton collisions at s√ = 8 TeV with the CMS experiment at the LHC, using a data sample corresponding to an integrated luminosity of 5.3 fb−1. The measurement is performed by analysing events with a pair of electrons or muons, or one electron and one muon, and at least two jets, one of which is identified as originating from hadronisation of a bottom quark. The measured cross section is 239 ± 2 (stat.) ± 11 (syst.) ± 6 (lum.) pb, for an assumed top-quark mass of 172.5 GeV, in agreement with the prediction of the standard model.



Titolo: Measurement of the t t-bar production cross section in the dilepton channel in pp collisions at sqrt(s) = 8 TeV
Autori: 
CANDELISE, VIERI
DELLA RICCA, GIUSEPPE
LA LICATA, CHIARA
MARONE, MATTEO
MONTANINO, DAMIANA
SCHIZZI, ANDREA
UMER, TOMO
mostra contributor esterni 
Data di pubblicazione: 2014
Rivista: 
JOURNAL OF HIGH ENERGY PHYSICS  
Abstract: The top-antitop quark (tt¯) production cross section is measured in proton-proton collisions at s√ = 8 TeV with the CMS experiment at the LHC, using a data sample corresponding to an integrated luminosity of 5.3 fb−1. The measurement is performed by analysing events with a pair of electrons or muons, or one electron and one muon, and at least two jets, one of which is identified as originating from hadronisation of a bottom quark. The measured cross section is 239 ± 2 (stat.) ± 11 (syst.) ± 6 (lum.) pb, for an assumed top-quark mass of 172.5 GeV, in agreement with the prediction of the standard model.
Handle: http://hdl.handle.net/11368/2739098
Digital Object Identifier (DOI): http://dx.doi.org/10.1007/JHEP02(2014)024
URL: http://link.springer.com/article/10.1007%2FJHEP02%282014%29024
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