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First Measurement of the cross section ratio ttbb/ttjj in pp Collisions at sqrt{s
We present the first measurement of the cross section ratio $\sigma$($t\bar{t}b\bar{b}$)/$\sigma$($t\bar{t}jj$) in the dilepton decay mode, using a data sample corresponding to an integrated luminosity of $5~\rm{fb}^{-1}$ collected in pp collisions at $\sqrt{s}$ = 7 TeV with the CMS detector at the...
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2012
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Acceso en línea: | http://cds.cern.ch/record/1479150 |
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author | CMS Collaboration |
author_facet | CMS Collaboration |
author_sort | CMS Collaboration |
collection | CERN |
description | We present the first measurement of the cross section ratio $\sigma$($t\bar{t}b\bar{b}$)/$\sigma$($t\bar{t}jj$) in the dilepton decay mode,
using a data sample corresponding to an integrated luminosity of $5~\rm{fb}^{-1}$ collected in pp collisions at $\sqrt{s}$ = 7 TeV
with the CMS detector at the LHC.
The cross section ratio $\sigma$($t\bar{t}b\bar{b}$)/$\sigma$($t\bar{t}jj$) is measured in the visible phase space
corresponding to the detector acceptance, and corrected to particle level.
The measurement is performed by means of a fit to the measured multiplicity distribution of $b$-tagged jets in a sample of dileptonic top quark pair candidate events with at least four reconstructed jets.
The result of the measurement, $3.6 \pm 1.1 ({\rm stat.}) \pm 0.9 ({\rm syst.}) \%$, is compared with various theory predictions. |
id | cern-1479150 |
institution | Organización Europea para la Investigación Nuclear |
publishDate | 2012 |
record_format | invenio |
spelling | cern-14791502019-09-30T06:29:59Zhttp://cds.cern.ch/record/1479150CMS CollaborationFirst Measurement of the cross section ratio ttbb/ttjj in pp Collisions at sqrt{sParticle Physics - ExperimentWe present the first measurement of the cross section ratio $\sigma$($t\bar{t}b\bar{b}$)/$\sigma$($t\bar{t}jj$) in the dilepton decay mode, using a data sample corresponding to an integrated luminosity of $5~\rm{fb}^{-1}$ collected in pp collisions at $\sqrt{s}$ = 7 TeV with the CMS detector at the LHC. The cross section ratio $\sigma$($t\bar{t}b\bar{b}$)/$\sigma$($t\bar{t}jj$) is measured in the visible phase space corresponding to the detector acceptance, and corrected to particle level. The measurement is performed by means of a fit to the measured multiplicity distribution of $b$-tagged jets in a sample of dileptonic top quark pair candidate events with at least four reconstructed jets. The result of the measurement, $3.6 \pm 1.1 ({\rm stat.}) \pm 0.9 ({\rm syst.}) \%$, is compared with various theory predictions.CMS-PAS-TOP-12-024oai:cds.cern.ch:14791502012 |
spellingShingle | Particle Physics - Experiment CMS Collaboration First Measurement of the cross section ratio ttbb/ttjj in pp Collisions at sqrt{s |
title | First Measurement of the cross section ratio ttbb/ttjj in pp Collisions at sqrt{s |
title_full | First Measurement of the cross section ratio ttbb/ttjj in pp Collisions at sqrt{s |
title_fullStr | First Measurement of the cross section ratio ttbb/ttjj in pp Collisions at sqrt{s |
title_full_unstemmed | First Measurement of the cross section ratio ttbb/ttjj in pp Collisions at sqrt{s |
title_short | First Measurement of the cross section ratio ttbb/ttjj in pp Collisions at sqrt{s |
title_sort | first measurement of the cross section ratio ttbb/ttjj in pp collisions at sqrt{s |
topic | Particle Physics - Experiment |
url | http://cds.cern.ch/record/1479150 |
work_keys_str_mv | AT cmscollaboration firstmeasurementofthecrosssectionratiottbbttjjinppcollisionsatsqrts |