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Measurement of the single-top t-channel charge ratio at 8 TeV
This note presents a measurement of the top and anti-top production ratio in single-top $t$-channel processes at 8 TeV with the CMS detector at the LHC. A selection exploiting the $t$-channel topology is performed. Events are selected with the top decaying either into an inclusive muon or electron....
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2013
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Acceso en línea: | http://cds.cern.ch/record/1528574 |
_version_ | 1780929473279950848 |
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author | CMS Collaboration |
author_facet | CMS Collaboration |
author_sort | CMS Collaboration |
collection | CERN |
description | This note presents a measurement of the top and anti-top production ratio in single-top $t$-channel processes at 8 TeV with the CMS detector at the LHC.
A selection exploiting the $t$-channel topology is performed.
Events are selected with the top decaying either into an inclusive muon or electron. The main backgrounds are evaluated through data-driven techniques. The distribution of pseudorapidity
of the recoil quark is exploited to extract the signal simultaneously in the events with positively and negatively charged leptons. The separate top and anti-top cross sections measurements yield $\sigma_{t\textrm{-ch., top}} = 49.9 \pm 9.1$ $\mathrm{pb}$ and $\sigma_{t\textrm{-ch., anti-top}} = 28.3 \pm 5.5$ $\mathrm{pb}$ respectively. The measured ratio is $R_{t\textrm{-ch.}}=\sigma_{t\textrm{-ch., top}}/\sigma_{t\textrm{-ch., anti-top}}=1.76 \pm 0.27$,
in agreement with the standard model predictions. |
id | cern-1528574 |
institution | Organización Europea para la Investigación Nuclear |
publishDate | 2013 |
record_format | invenio |
spelling | cern-15285742019-09-30T06:29:59Zhttp://cds.cern.ch/record/1528574CMS CollaborationMeasurement of the single-top t-channel charge ratio at 8 TeVParticle Physics - ExperimentThis note presents a measurement of the top and anti-top production ratio in single-top $t$-channel processes at 8 TeV with the CMS detector at the LHC. A selection exploiting the $t$-channel topology is performed. Events are selected with the top decaying either into an inclusive muon or electron. The main backgrounds are evaluated through data-driven techniques. The distribution of pseudorapidity of the recoil quark is exploited to extract the signal simultaneously in the events with positively and negatively charged leptons. The separate top and anti-top cross sections measurements yield $\sigma_{t\textrm{-ch., top}} = 49.9 \pm 9.1$ $\mathrm{pb}$ and $\sigma_{t\textrm{-ch., anti-top}} = 28.3 \pm 5.5$ $\mathrm{pb}$ respectively. The measured ratio is $R_{t\textrm{-ch.}}=\sigma_{t\textrm{-ch., top}}/\sigma_{t\textrm{-ch., anti-top}}=1.76 \pm 0.27$, in agreement with the standard model predictions.CMS-PAS-TOP-12-038oai:cds.cern.ch:15285742013 |
spellingShingle | Particle Physics - Experiment CMS Collaboration Measurement of the single-top t-channel charge ratio at 8 TeV |
title | Measurement of the single-top t-channel charge ratio at 8 TeV |
title_full | Measurement of the single-top t-channel charge ratio at 8 TeV |
title_fullStr | Measurement of the single-top t-channel charge ratio at 8 TeV |
title_full_unstemmed | Measurement of the single-top t-channel charge ratio at 8 TeV |
title_short | Measurement of the single-top t-channel charge ratio at 8 TeV |
title_sort | measurement of the single-top t-channel charge ratio at 8 tev |
topic | Particle Physics - Experiment |
url | http://cds.cern.ch/record/1528574 |
work_keys_str_mv | AT cmscollaboration measurementofthesingletoptchannelchargeratioat8tev |