Search for stable hadronising squarks and gluinos with the ATLAS experiment at the LHC

Hitherto unobserved long-lived massive particles with electric and/or colour charge are predicted by a range of theories which extend the Standard Model. In this Letter a search is performed at the ATLAS experiment for slow-moving charged particles produced in proton–proton collisions at 7 TeV centr...

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Detalles Bibliográficos
Publicado: 2011
Materias:
Limit
Long-lived particle
R-hadron
Supersymmetry
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v701_n1_p1_Aad
http://hdl.handle.net/20.500.12110/paper_03702693_v701_n1_p1_Aad
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_03702693_v701_n1_p1_Aad
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spelling paper:paper_03702693_v701_n1_p1_Aad2023-06-08T15:36:53Z Search for stable hadronising squarks and gluinos with the ATLAS experiment at the LHC Limit Long-lived particle R-hadron Supersymmetry Hitherto unobserved long-lived massive particles with electric and/or colour charge are predicted by a range of theories which extend the Standard Model. In this Letter a search is performed at the ATLAS experiment for slow-moving charged particles produced in proton–proton collisions at 7 TeV centre-of-mass energy at the LHC, using a data-set corresponding to an integrated luminosity of 34 pb −1 . No deviations from Standard Model expectations are found. This result is interpreted in a framework of supersymmetry models in which coloured sparticles can hadronise into long-lived bound hadronic states, termed R-hadrons, and 95% CL limits are set on the production cross-sections of squarks and gluinos. The influence of R-hadron interactions in matter was studied using a number of different models, and lower mass limits for stable sbottoms and stops are found to be 294 and 309 GeV respectively. The lower mass limit for a stable gluino lies in the range from 562 to 586 GeV depending on the model assumed. Each of these constraints is the most stringent to date. © 2011 CERN 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v701_n1_p1_Aad http://hdl.handle.net/20.500.12110/paper_03702693_v701_n1_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)
topic Limit
Long-lived particle
R-hadron
Supersymmetry
spellingShingle Limit
Long-lived particle
R-hadron
Supersymmetry
Search for stable hadronising squarks and gluinos with the ATLAS experiment at the LHC
topic_facet Limit
Long-lived particle
R-hadron
Supersymmetry
description Hitherto unobserved long-lived massive particles with electric and/or colour charge are predicted by a range of theories which extend the Standard Model. In this Letter a search is performed at the ATLAS experiment for slow-moving charged particles produced in proton–proton collisions at 7 TeV centre-of-mass energy at the LHC, using a data-set corresponding to an integrated luminosity of 34 pb −1 . No deviations from Standard Model expectations are found. This result is interpreted in a framework of supersymmetry models in which coloured sparticles can hadronise into long-lived bound hadronic states, termed R-hadrons, and 95% CL limits are set on the production cross-sections of squarks and gluinos. The influence of R-hadron interactions in matter was studied using a number of different models, and lower mass limits for stable sbottoms and stops are found to be 294 and 309 GeV respectively. The lower mass limit for a stable gluino lies in the range from 562 to 586 GeV depending on the model assumed. Each of these constraints is the most stringent to date. © 2011 CERN
title Search for stable hadronising squarks and gluinos with the ATLAS experiment at the LHC
title_short Search for stable hadronising squarks and gluinos with the ATLAS experiment at the LHC
title_full Search for stable hadronising squarks and gluinos with the ATLAS experiment at the LHC
title_fullStr Search for stable hadronising squarks and gluinos with the ATLAS experiment at the LHC
title_full_unstemmed Search for stable hadronising squarks and gluinos with the ATLAS experiment at the LHC
title_sort search for stable hadronising squarks and gluinos with the atlas experiment at the lhc
publishDate 2011
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v701_n1_p1_Aad
http://hdl.handle.net/20.500.12110/paper_03702693_v701_n1_p1_Aad
_version_ 1768544134972309504

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