Search for long-lived, heavy particles in final states with a muon and multi-track displaced vertex in proton–proton collisions at √s = 7 TeV with the ATLAS detector

Many extensions of the Standard Model posit the existence of heavy particles with long lifetimes. In this Letter, results are presented of a search for events containing one or more such particles, which decay at a significant distance from their production point, using a final state containing char...

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Detalles Bibliográficos
Autores principales: Alonso, Francisco, Anduaga, Xabier Sebastián, Dova, María Teresa, Monticelli, Fernando Gabriel, Tripiana, Martín F., The ATLAS Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2013
Materias:
Ciencias Exactas
Física
Partículas Elementales
proton-proton collisions
ATLAS detector
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/79847
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-79847
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Física
Partículas Elementales
proton-proton collisions
ATLAS detector
spellingShingle Ciencias Exactas
Física
Partículas Elementales
proton-proton collisions
ATLAS detector
Alonso, Francisco
Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín F.
The ATLAS Collaboration
Search for long-lived, heavy particles in final states with a muon and multi-track displaced vertex in proton–proton collisions at √s = 7 TeV with the ATLAS detector
topic_facet Ciencias Exactas
Física
Partículas Elementales
proton-proton collisions
ATLAS detector
description Many extensions of the Standard Model posit the existence of heavy particles with long lifetimes. In this Letter, results are presented of a search for events containing one or more such particles, which decay at a significant distance from their production point, using a final state containing charged hadrons and an associated muon. This analysis uses a data sample of proton–proton collisions at √s = 7 TeV corresponding to an integrated luminosity of 4.4 fb<sup>−1</sup> collected in 2011 by the ATLAS detector operating at the Large Hadron Collider. Results are interpreted in the context of R-parity violating supersymmetric scenarios. No events in the signal region are observed and limits are set on the production cross section for pair production of supersymmetric particles, multiplied by the square of the branching fraction for a neutralino to decay to charged hadrons and a muon, based on the scenario where both of the produced supersymmetric particles give rise to neutralinos that decay in this way. However, since the search strategy is based on triggering on and reconstructing the decay products of individual long-lived particles, irrespective of the rest of the event, these limits can easily be reinterpreted in scenarios with different numbers of long-lived particles per event. The limits are presented as a function of neutralino lifetime, and for a range of squark and neutralino masses.
format Articulo
Articulo
author Alonso, Francisco
Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín F.
The ATLAS Collaboration
author_facet Alonso, Francisco
Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín F.
The ATLAS Collaboration
author_sort Alonso, Francisco
title Search for long-lived, heavy particles in final states with a muon and multi-track displaced vertex in proton–proton collisions at √s = 7 TeV with the ATLAS detector
title_short Search for long-lived, heavy particles in final states with a muon and multi-track displaced vertex in proton–proton collisions at √s = 7 TeV with the ATLAS detector
title_full Search for long-lived, heavy particles in final states with a muon and multi-track displaced vertex in proton–proton collisions at √s = 7 TeV with the ATLAS detector
title_fullStr Search for long-lived, heavy particles in final states with a muon and multi-track displaced vertex in proton–proton collisions at √s = 7 TeV with the ATLAS detector
title_full_unstemmed Search for long-lived, heavy particles in final states with a muon and multi-track displaced vertex in proton–proton collisions at √s = 7 TeV with the ATLAS detector
title_sort search for long-lived, heavy particles in final states with a muon and multi-track displaced vertex in proton–proton collisions at √s = 7 tev with the atlas detector
publishDate 2013
url http://sedici.unlp.edu.ar/handle/10915/79847
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