Speaker
Sofia Maria Consonni
(INFN - Milano)
Description
Tau leptons will play an important role in the physics program
at the LHC. They will be used not only in searches for new
phenomena like the Higgs boson or Supersymmetry and electroweak
measurements but also in detector related studies like the
determination of the missing transverse energy scale.
Optimal identification of hadronically decaying tau leptons is achieved
by using detailed information from tracking and calorimeter detector
components. Variables describing the properties of calorimeter energy
deposits and track reconstruction within tau candidates are combined in
multi-variate discriminants, to achieve high rejection against backgrounds.
The identification efficiencies are measured by $W\rightarrow \tau\nu$ and
$Z\rightarrow \tau\tau$ events, and compared with the prediction of the Monte Carlo
simulation. The energy scale uncertainties for tau leptons are
determined by investigating single hadron calorimeter response, as well
as kinematic distributions in $Z\rightarrow \tau\tau$ events.
for the collaboration
ATLAS collaboration
