IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Identification and energy calibration of hadronically decaying tau leptons with the ATLAS experiment in pp collisions at s√=8 TeV
Autor/es:
F. MONTICELLI, FOR THE ATLAS CLLABORATION; ATLAS COLLABORATION
Revista:
EUROPEAN PHYSICAL JOURNAL C - PARTICLES AND FIELDS
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 2014
ISSN:
1434-6044
Resumen:
This paper describes the trigger and offline reconstruction,
identification and energy calibration algorithms for hadronic decays of
tau leptons employed for the data collected from pp collisions in 2012 with the ATLAS detector at the LHC center-of-mass energy s√=8
TeV. The performance of these algorithms is measured in most cases with
Z decays to tau leptons using the full 2012 dataset, corresponding to
an integrated luminosity of 20.3 fb−1.
An uncertainty on the offline reconstructed tau energy scale of 2% to
4%, depending on transverse energy and pseudorapidity, is achieved using
two independent methods. The offline tau identification efficiency is
measured with a precision of 2.5% for hadronically decaying tau leptons
with one associated track, and of 4% for the case of three associated
tracks, inclusive in pseudorapidity and for a visible transverse energy
greater than 20
GeV. For hadronic tau lepton decays selected by offline algorithms, the
tau trigger identification efficiency is measured with a precision of
2% to 8%, depending on the transverse energy. The performance of the tau
algorithms, both offline and at the trigger level, is found to be
stable with respect to the number of concurrent proton--proton
interactions and has supported a variety of physics results using
hadronically decaying tau leptons at ATLAS.