Measurement of Z boson production in Pb-Pb collisions at √S NN = 2.76 TeV with the ATLAS detector

The ATLAS experiment has observed 1995 Z boson candidates in data corresponding to 0:15 nb -1 of integrated luminosity obtained in the 2011 LHC Pb + Pb run at √S NN = 2.76 TeV. The Z bosons are reconstructed via dielectron and dimuon decay channels, with a background contamination of less than 3%. R...

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Guardado en:
Detalles Bibliográficos
Publicado: 2013
Materias:
Lead
Tellurium compounds
Uncertainty analysis
ATLAS detectors
ATLAS experiment
Azimuthal distributions
Binary collisions
Decay channels
Glauber models
Integrated luminosity
Pb-Pb collisions
Systematic uncertainties
Two channel
Z Bosons
Bosons
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319007_v110_n2_p022301-1_Aad
http://hdl.handle.net/20.500.12110/paper_00319007_v110_n2_p022301-1_Aad
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:The ATLAS experiment has observed 1995 Z boson candidates in data corresponding to 0:15 nb -1 of integrated luminosity obtained in the 2011 LHC Pb + Pb run at √S NN = 2.76 TeV. The Z bosons are reconstructed via dielectron and dimuon decay channels, with a background contamination of less than 3%. Results from the two channels are consistent and are combined. Within the statistical and systematic uncertainties, the per-event Z boson yield is proportional to the number of binary collisions estimated by the Glauber model. The elliptic anisotropy of the azimuthal distribution of the Z boson with respect to the event plane is found to be consistent with zero. © 2013 CERN.

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