Measurement of the cross section of high transverse momentum Z→bb¯ production in proton–proton collisions at √s=8 TeV with the ATLAS detector

This Letter reports the observation of a high transverse momentum Z→bb¯ signal in proton–proton collisions at s=8 TeV and the measurement of its production cross section. The data analysed were collected in 2012 with the ATLAS detector at the LHC and correspond to an integrated luminosity of 19.5 fb...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autor principal: Aad, G.
Formato: JOUR
Materias:
Boosted bb¯ topologies
LHC
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_03702693_v738_n_p25_Aad
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_03702693_v738_n_p25_Aad
record_format dspace
spelling todo:paper_03702693_v738_n_p25_Aad2023-10-03T15:29:35Z Measurement of the cross section of high transverse momentum Z→bb¯ production in proton–proton collisions at √s=8 TeV with the ATLAS detector Aad, G. Boosted bb¯ topologies LHC This Letter reports the observation of a high transverse momentum Z→bb¯ signal in proton–proton collisions at s=8 TeV and the measurement of its production cross section. The data analysed were collected in 2012 with the ATLAS detector at the LHC and correspond to an integrated luminosity of 19.5 fb −1 . The Z→bb¯ decay is reconstructed from a pair of b-tagged jets, clustered with the anti-k t jet algorithm with R=0.4, that have low angular separation and form a dijet with p T >200 GeV. The signal yield is extracted from a fit to the dijet invariant mass distribution, with the dominant, multi-jet background mass shape estimated by employing a fully data-driven technique that reduces the dependence of the analysis on simulation. The fiducial cross section is determined to be σ Z→bb¯ fid =2.02±0.20 (stat.) ±0.25 (syst.)±0.06 (lumi.) pb=2.02 ±0.33 pb, in good agreement with next-to-leading-order theoretical predictions. © 2014 JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03702693_v738_n_p25_Aad
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Boosted bb¯ topologies
LHC
spellingShingle Boosted bb¯ topologies
LHC
Aad, G.
Measurement of the cross section of high transverse momentum Z→bb¯ production in proton–proton collisions at √s=8 TeV with the ATLAS detector
topic_facet Boosted bb¯ topologies
LHC
description This Letter reports the observation of a high transverse momentum Z→bb¯ signal in proton–proton collisions at s=8 TeV and the measurement of its production cross section. The data analysed were collected in 2012 with the ATLAS detector at the LHC and correspond to an integrated luminosity of 19.5 fb −1 . The Z→bb¯ decay is reconstructed from a pair of b-tagged jets, clustered with the anti-k t jet algorithm with R=0.4, that have low angular separation and form a dijet with p T >200 GeV. The signal yield is extracted from a fit to the dijet invariant mass distribution, with the dominant, multi-jet background mass shape estimated by employing a fully data-driven technique that reduces the dependence of the analysis on simulation. The fiducial cross section is determined to be σ Z→bb¯ fid =2.02±0.20 (stat.) ±0.25 (syst.)±0.06 (lumi.) pb=2.02 ±0.33 pb, in good agreement with next-to-leading-order theoretical predictions. © 2014
format JOUR
author Aad, G.
author_facet Aad, G.
author_sort Aad, G.
title Measurement of the cross section of high transverse momentum Z→bb¯ production in proton–proton collisions at √s=8 TeV with the ATLAS detector
title_short Measurement of the cross section of high transverse momentum Z→bb¯ production in proton–proton collisions at √s=8 TeV with the ATLAS detector
title_full Measurement of the cross section of high transverse momentum Z→bb¯ production in proton–proton collisions at √s=8 TeV with the ATLAS detector
title_fullStr Measurement of the cross section of high transverse momentum Z→bb¯ production in proton–proton collisions at √s=8 TeV with the ATLAS detector
title_full_unstemmed Measurement of the cross section of high transverse momentum Z→bb¯ production in proton–proton collisions at √s=8 TeV with the ATLAS detector
title_sort measurement of the cross section of high transverse momentum z→bb¯ production in proton–proton collisions at √s=8 tev with the atlas detector
url http://hdl.handle.net/20.500.12110/paper_03702693_v738_n_p25_Aad
work_keys_str_mv AT aadg measurementofthecrosssectionofhightransversemomentumzbbproductioninprotonprotoncollisionsats8tevwiththeatlasdetector
_version_ 1807324068734566400

Ejemplares similares