Cargando…
Probing the top-quark coupling to the photon through the cross-section measurement of $t\bar{t}\gamma$ production in $\textit{pp}$ collisions with the ATLAS detector
The cross section of top-quark pair production in association with a photon is measured in proton–proton collisions at a centre-of-mass energy $\sqrt{s}$ = 8 TeV with 20.2 fb$^{-1}$of data and at $\sqrt{s}$ = 13 TeV with 36.1 fb$^{-1}$ of data. Both datasets are collected by the ATLAS detector at th...
Autor principal: | |
---|---|
Lenguaje: | eng |
Publicado: |
2018
|
Materias: | |
Acceso en línea: | http://cds.cern.ch/record/2320139 |
_version_ | 1780958472957853696 |
---|---|
author | Ghneimat, Mazuza Mohammad A |
author_facet | Ghneimat, Mazuza Mohammad A |
author_sort | Ghneimat, Mazuza Mohammad A |
collection | CERN |
description | The cross section of top-quark pair production in association with a photon is measured in proton–proton collisions at a centre-of-mass energy $\sqrt{s}$ = 8 TeV with 20.2 fb$^{-1}$of data and at $\sqrt{s}$ = 13 TeV with 36.1 fb$^{-1}$ of data. Both datasets are collected by the ATLAS detector at the Large Hadron Collider. The measurements provide a direct probe of the electromagnetic top-quark coupling. The $t\bar{t}\gamma$ events in the 8 (13) TeV analysis are selected by requiring a photon with a transverse momentum $p_{\rm{T}}$ > 15 (20) GeV, one (two) isolated lepton(s) with large transverse momentum, large missing transverse momentum, and at least four (two) jets, where at least one of them is identified as originating from a $b$-quark. The inclusive and differential cross sections are measured in a fiducial region, defined to be close to the selection requirements. The inclusive fiducial cross sections at 8 TeV and 13 TeV are found to be 139 $\pm$ 18 fb in the single-lepton channel, and 69.3 $\pm$ 4.3 fb in the dilepton channel, in agreement with the theoretical predictions at next-to-leading order in QCD. |
id | cern-2320139 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2018 |
record_format | invenio |
spelling | cern-23201392019-09-30T06:29:59Zhttp://cds.cern.ch/record/2320139engGhneimat, Mazuza Mohammad AProbing the top-quark coupling to the photon through the cross-section measurement of $t\bar{t}\gamma$ production in $\textit{pp}$ collisions with the ATLAS detectorParticle Physics - ExperimentThe cross section of top-quark pair production in association with a photon is measured in proton–proton collisions at a centre-of-mass energy $\sqrt{s}$ = 8 TeV with 20.2 fb$^{-1}$of data and at $\sqrt{s}$ = 13 TeV with 36.1 fb$^{-1}$ of data. Both datasets are collected by the ATLAS detector at the Large Hadron Collider. The measurements provide a direct probe of the electromagnetic top-quark coupling. The $t\bar{t}\gamma$ events in the 8 (13) TeV analysis are selected by requiring a photon with a transverse momentum $p_{\rm{T}}$ > 15 (20) GeV, one (two) isolated lepton(s) with large transverse momentum, large missing transverse momentum, and at least four (two) jets, where at least one of them is identified as originating from a $b$-quark. The inclusive and differential cross sections are measured in a fiducial region, defined to be close to the selection requirements. The inclusive fiducial cross sections at 8 TeV and 13 TeV are found to be 139 $\pm$ 18 fb in the single-lepton channel, and 69.3 $\pm$ 4.3 fb in the dilepton channel, in agreement with the theoretical predictions at next-to-leading order in QCD.CERN-THESIS-2018-056BONN-IR-2018-05oai:cds.cern.ch:23201392018-05-25T12:24:39Z |
spellingShingle | Particle Physics - Experiment Ghneimat, Mazuza Mohammad A Probing the top-quark coupling to the photon through the cross-section measurement of $t\bar{t}\gamma$ production in $\textit{pp}$ collisions with the ATLAS detector |
title | Probing the top-quark coupling to the photon through the cross-section measurement of $t\bar{t}\gamma$ production in $\textit{pp}$ collisions with the ATLAS detector |
title_full | Probing the top-quark coupling to the photon through the cross-section measurement of $t\bar{t}\gamma$ production in $\textit{pp}$ collisions with the ATLAS detector |
title_fullStr | Probing the top-quark coupling to the photon through the cross-section measurement of $t\bar{t}\gamma$ production in $\textit{pp}$ collisions with the ATLAS detector |
title_full_unstemmed | Probing the top-quark coupling to the photon through the cross-section measurement of $t\bar{t}\gamma$ production in $\textit{pp}$ collisions with the ATLAS detector |
title_short | Probing the top-quark coupling to the photon through the cross-section measurement of $t\bar{t}\gamma$ production in $\textit{pp}$ collisions with the ATLAS detector |
title_sort | probing the top-quark coupling to the photon through the cross-section measurement of $t\bar{t}\gamma$ production in $\textit{pp}$ collisions with the atlas detector |
topic | Particle Physics - Experiment |
url | http://cds.cern.ch/record/2320139 |
work_keys_str_mv | AT ghneimatmazuzamohammada probingthetopquarkcouplingtothephotonthroughthecrosssectionmeasurementoftbartgammaproductionintextitppcollisionswiththeatlasdetector |