Measurement of the top quark decay branching fraction ratio $R_b = {\cal B}(t \to Wb)/{\cal B}(t \to Wq)$ and of the inclusive production cross section $pp$ $\to$ $t\bar{t}$ in the dilepton channel at ATLAS

The top quark branching fraction ratio $R_b$ and the inclusive production cross section $\sigma_{t\bar{t}}$ are measured in the dilepton channel using 4.6 fb$^{−1}$ of proton-proton collisions at the centre-of-mass energy $\sqrt{s}$ = 7 TeV collected with the ATLAS detector at the Large Hadron Colli...

Descripción completa

Detalles Bibliográficos
Autor principal: Leyko, Agnieszka
Lenguaje:eng
Publicado: 2021
Materias:
Particle Physics - Experiment
Acceso en línea:http://cds.cern.ch/record/2790810
_version_ 1780972271142174720
author Leyko, Agnieszka
author_facet Leyko, Agnieszka
author_sort Leyko, Agnieszka
collection CERN
description The top quark branching fraction ratio $R_b$ and the inclusive production cross section $\sigma_{t\bar{t}}$ are measured in the dilepton channel using 4.6 fb$^{−1}$ of proton-proton collisions at the centre-of-mass energy $\sqrt{s}$ = 7 TeV collected with the ATLAS detector at the Large Hadron Collider at CERN. Template fits to the distribution of the number of $b$-tagged jets find $R_b$ = 1.02 ± 0.01 (stat.) ± 0.07 (syst.) and $\sigma_{t\bar{t}}$ = 178 ± 3 (stat.) ± 19 (syst.) pb. Lower limits on $R_b$ and on the CKM matrix element |$V_{tb}$| are set with the measured value of $R_b$ to $R_b > 0.88$ and |$V_{tb}$| > 0.94 at 95% confidence level.
id cern-2790810
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2021
record_format invenio
spelling cern-27908102021-11-23T09:35:15Zhttp://cds.cern.ch/record/2790810engLeyko, AgnieszkaMeasurement of the top quark decay branching fraction ratio $R_b = {\cal B}(t \to Wb)/{\cal B}(t \to Wq)$ and of the inclusive production cross section $pp$ $\to$ $t\bar{t}$ in the dilepton channel at ATLASParticle Physics - ExperimentThe top quark branching fraction ratio $R_b$ and the inclusive production cross section $\sigma_{t\bar{t}}$ are measured in the dilepton channel using 4.6 fb$^{−1}$ of proton-proton collisions at the centre-of-mass energy $\sqrt{s}$ = 7 TeV collected with the ATLAS detector at the Large Hadron Collider at CERN. Template fits to the distribution of the number of $b$-tagged jets find $R_b$ = 1.02 ± 0.01 (stat.) ± 0.07 (syst.) and $\sigma_{t\bar{t}}$ = 178 ± 3 (stat.) ± 19 (syst.) pb. Lower limits on $R_b$ and on the CKM matrix element |$V_{tb}$| are set with the measured value of $R_b$ to $R_b > 0.88$ and |$V_{tb}$| > 0.94 at 95% confidence level.CERN-THESIS-2020-375oai:cds.cern.ch:27908102021-11-17T18:48:26Z
spellingShingle Particle Physics - Experiment
Leyko, Agnieszka
Measurement of the top quark decay branching fraction ratio $R_b = {\cal B}(t \to Wb)/{\cal B}(t \to Wq)$ and of the inclusive production cross section $pp$ $\to$ $t\bar{t}$ in the dilepton channel at ATLAS
title Measurement of the top quark decay branching fraction ratio $R_b = {\cal B}(t \to Wb)/{\cal B}(t \to Wq)$ and of the inclusive production cross section $pp$ $\to$ $t\bar{t}$ in the dilepton channel at ATLAS
title_full Measurement of the top quark decay branching fraction ratio $R_b = {\cal B}(t \to Wb)/{\cal B}(t \to Wq)$ and of the inclusive production cross section $pp$ $\to$ $t\bar{t}$ in the dilepton channel at ATLAS
title_fullStr Measurement of the top quark decay branching fraction ratio $R_b = {\cal B}(t \to Wb)/{\cal B}(t \to Wq)$ and of the inclusive production cross section $pp$ $\to$ $t\bar{t}$ in the dilepton channel at ATLAS
title_full_unstemmed Measurement of the top quark decay branching fraction ratio $R_b = {\cal B}(t \to Wb)/{\cal B}(t \to Wq)$ and of the inclusive production cross section $pp$ $\to$ $t\bar{t}$ in the dilepton channel at ATLAS
title_short Measurement of the top quark decay branching fraction ratio $R_b = {\cal B}(t \to Wb)/{\cal B}(t \to Wq)$ and of the inclusive production cross section $pp$ $\to$ $t\bar{t}$ in the dilepton channel at ATLAS
title_sort measurement of the top quark decay branching fraction ratio $r_b = {\cal b}(t \to wb)/{\cal b}(t \to wq)$ and of the inclusive production cross section $pp$ $\to$ $t\bar{t}$ in the dilepton channel at atlas
topic Particle Physics - Experiment
url http://cds.cern.ch/record/2790810
work_keys_str_mv AT leykoagnieszka measurementofthetopquarkdecaybranchingfractionratiorbcalbttowbcalbttowqandoftheinclusiveproductioncrosssectionpptotbartinthedileptonchannelatatlas

Ejemplares similares