Search for anomaly-mediated supersymmetry breaking with the ATLAS detector based on a disappearing-track signature in pp collisions at √s=7 TeV

In models of anomaly-mediated supersymmetry breaking (AMSB), the lightest chargino is predicted to have a lifetime long enough to be detected in collider experiments. This letter explores AMSB scenarios in pp collisions at (Formula Presented) = 7 TeV by attempting to identify decaying charginos whic...

Descripción completa

Guardado en:
Detalles Bibliográficos
Publicado: 2012
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346044_v72_n4_p1_Aad
http://hdl.handle.net/20.500.12110/paper_14346044_v72_n4_p1_Aad
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_14346044_v72_n4_p1_Aad
record_format dspace
spelling paper:paper_14346044_v72_n4_p1_Aad2023-06-08T16:14:49Z Search for anomaly-mediated supersymmetry breaking with the ATLAS detector based on a disappearing-track signature in pp collisions at √s=7 TeV In models of anomaly-mediated supersymmetry breaking (AMSB), the lightest chargino is predicted to have a lifetime long enough to be detected in collider experiments. This letter explores AMSB scenarios in pp collisions at (Formula Presented) = 7 TeV by attempting to identify decaying charginos which result in tracks that appear to have few associated hits in the outer region of the tracking system. The search was based on data corresponding to an integrated luminosity of 1.02 fb − 1 collected with the ATLAS detector in 2011. The pT spectrum of candidate tracks is found to be consistent with the expectation from Standard Model background processes and constraints on the lifetime and the production cross section were obtained. In the minimal AMSB framework with m 3/2 < 32 TeV, m 0 < 1.5 TeV, tanβ = 5 and μ > 0, a chargino having mass below 92 GeV and a lifetime between 0.5 ns and 2 ns is excluded at 95 % confidence level. © CERN for the benefit of the ATLAS collaboration 2012. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346044_v72_n4_p1_Aad http://hdl.handle.net/20.500.12110/paper_14346044_v72_n4_p1_Aad
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description In models of anomaly-mediated supersymmetry breaking (AMSB), the lightest chargino is predicted to have a lifetime long enough to be detected in collider experiments. This letter explores AMSB scenarios in pp collisions at (Formula Presented) = 7 TeV by attempting to identify decaying charginos which result in tracks that appear to have few associated hits in the outer region of the tracking system. The search was based on data corresponding to an integrated luminosity of 1.02 fb − 1 collected with the ATLAS detector in 2011. The pT spectrum of candidate tracks is found to be consistent with the expectation from Standard Model background processes and constraints on the lifetime and the production cross section were obtained. In the minimal AMSB framework with m 3/2 < 32 TeV, m 0 < 1.5 TeV, tanβ = 5 and μ > 0, a chargino having mass below 92 GeV and a lifetime between 0.5 ns and 2 ns is excluded at 95 % confidence level. © CERN for the benefit of the ATLAS collaboration 2012.
title Search for anomaly-mediated supersymmetry breaking with the ATLAS detector based on a disappearing-track signature in pp collisions at √s=7 TeV
spellingShingle Search for anomaly-mediated supersymmetry breaking with the ATLAS detector based on a disappearing-track signature in pp collisions at √s=7 TeV
title_short Search for anomaly-mediated supersymmetry breaking with the ATLAS detector based on a disappearing-track signature in pp collisions at √s=7 TeV
title_full Search for anomaly-mediated supersymmetry breaking with the ATLAS detector based on a disappearing-track signature in pp collisions at √s=7 TeV
title_fullStr Search for anomaly-mediated supersymmetry breaking with the ATLAS detector based on a disappearing-track signature in pp collisions at √s=7 TeV
title_full_unstemmed Search for anomaly-mediated supersymmetry breaking with the ATLAS detector based on a disappearing-track signature in pp collisions at √s=7 TeV
title_sort search for anomaly-mediated supersymmetry breaking with the atlas detector based on a disappearing-track signature in pp collisions at √s=7 tev
publishDate 2012
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346044_v72_n4_p1_Aad
http://hdl.handle.net/20.500.12110/paper_14346044_v72_n4_p1_Aad
_version_ 1768546642121719808

Ejemplares similares