Measurement of the Λ<SUP>0</SUP><SUB>b</SUB> lifetime and mass in the ATLAS experiment

A measurement of the Λ<SUP>0</SUP><SUB>b</SUB> lifetime and mass in the decay channel Λ<SUP>0</SUP><SUB>b</SUB> →J/ψ(μ<SUP>+</SUP>μ¯)Λ<SUP>0</SUP>(pπ¯) is presented. The analysis uses a signal sample of about 2200 Λ<SUP>0&...

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Detalles Bibliográficos
Autores principales: Alonso, Francisco, Anduaga, Xabier Sebastián, Dova, María Teresa, Monticelli, Fernando Gabriel, Tripiana, Martín Fernando, The ATLAS Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2013
Materias:
Ciencias Exactas
Física
Collisions
Proton–proton collisions
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/85372
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-85372
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
Collisions
Proton–proton collisions
spellingShingle Ciencias Exactas
Física
Collisions
Proton–proton collisions
Alonso, Francisco
Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín Fernando
The ATLAS Collaboration
Measurement of the Λ<SUP>0</SUP><SUB>b</SUB> lifetime and mass in the ATLAS experiment
topic_facet Ciencias Exactas
Física
Collisions
Proton–proton collisions
description A measurement of the Λ<SUP>0</SUP><SUB>b</SUB> lifetime and mass in the decay channel Λ<SUP>0</SUP><SUB>b</SUB> →J/ψ(μ<SUP>+</SUP>μ¯)Λ<SUP>0</SUP>(pπ¯) is presented. The analysis uses a signal sample of about 2200 Λ<SUP>0</SUP><SUB>b</SUB> and Λ¯<SUP>0</SUP><SUB>b</SUB> decays that are reconstructed in 4.9 fb<SUP>-1</SUP> of ATLAS pp collision data collected in 2011 at the LHC center-of-mass energy of 7 TeV. A simultaneous mass and decay time maximum likelihood fit is used to extract the Λ<SUP>0</SUP><SUB>b</SUB> lifetime and mass. They are measured to be τ<SUB>Λ<sub>b</sub></SUB>=1.449±0.036(stat) ±0.017(syst) ps and m<SUB>Λ<sub>b</sub></SUB>=5619.7±0. 7(stat)±1.1(syst) MeV.
format Articulo
Articulo
author Alonso, Francisco
Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín Fernando
The ATLAS Collaboration
author_facet Alonso, Francisco
Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín Fernando
The ATLAS Collaboration
author_sort Alonso, Francisco
title Measurement of the Λ<SUP>0</SUP><SUB>b</SUB> lifetime and mass in the ATLAS experiment
title_short Measurement of the Λ<SUP>0</SUP><SUB>b</SUB> lifetime and mass in the ATLAS experiment
title_full Measurement of the Λ<SUP>0</SUP><SUB>b</SUB> lifetime and mass in the ATLAS experiment
title_fullStr Measurement of the Λ<SUP>0</SUP><SUB>b</SUB> lifetime and mass in the ATLAS experiment
title_full_unstemmed Measurement of the Λ<SUP>0</SUP><SUB>b</SUB> lifetime and mass in the ATLAS experiment
title_sort measurement of the λ<sup>0</sup><sub>b</sub> lifetime and mass in the atlas experiment
publishDate 2013
url http://sedici.unlp.edu.ar/handle/10915/85372
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bdutipo_str Repositorios
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