The inclusive b-jet production cross section in pp collisions at a center-ofmass energy of 7 TeV is measured using data collected by the CMS experiment at the LHC. The cross section is presented as a function of the jet transverse momentum in the range 18 < pT < 200 GeV for several rapidity intervals. The results are also given as the ratio of the b-jet production cross section to the inclusive jet production cross section. The measurement is performed with two different analyses, which differ in their trigger selection and b-jet identification: a jet analysis that selects events with a b jet using a sample corresponding to an integrated luminosity of 34 pb−1, and a muon analysis requiring a b jet with a muon based on an integrated luminosity of 3 pb−1. In both approaches the bjets are identified by requiring a secondary vertex. The results from the two methods arein agreement with each other and with next-to-leading order calculations, as well as with predictions based on the pythia event generator.
Inclusive b-jet production in pp collisions at $\sqrt {s} = 7TeV$
AMAPANE, Nicola Carlo;ARGIRO', Stefano;BOTTA, CRISTINA;COSTA, Marco;MIGLIORE, Ernesto;MONACO, Vincenzo;MUSICH, MARCO;OBERTINO, Maria Margherita;PELLICCIONI, Mario;POTENZA, ALBERTO;ROMERO, Alessandra;SACCHI, Roberto;SOLANO, Ada Maria;TRAPANI, Pier Paolo;BELLAN, Riccardo;COVARELLI, Roberto;
2012-01-01
Abstract
The inclusive b-jet production cross section in pp collisions at a center-ofmass energy of 7 TeV is measured using data collected by the CMS experiment at the LHC. The cross section is presented as a function of the jet transverse momentum in the range 18 < pT < 200 GeV for several rapidity intervals. The results are also given as the ratio of the b-jet production cross section to the inclusive jet production cross section. The measurement is performed with two different analyses, which differ in their trigger selection and b-jet identification: a jet analysis that selects events with a b jet using a sample corresponding to an integrated luminosity of 34 pb−1, and a muon analysis requiring a b jet with a muon based on an integrated luminosity of 3 pb−1. In both approaches the bjets are identified by requiring a secondary vertex. The results from the two methods arein agreement with each other and with next-to-leading order calculations, as well as with predictions based on the pythia event generator.File | Dimensione | Formato | |
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