Modelling Z→TT processes in ATLAS with T-embedded Z →μμ data [electronic resource].
- Washington, D.C. : United States. Dept. of Energy. ; Oak Ridge, Tenn. : distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2015
- Physical description
- 1 online resource (Article No. P09018 ) : digital, PDF file.
- Lawrence Berkeley National Laboratory. Researcher
- United States. Dept. of Energy. Sponsor
- United States. Dept. of Energy. Office of Scientific and Technical Information. Distributor
- Aad, G. Author
- We describe the concept, technical realisation and validation of a largely data-driven method to model events with Z→ττ decays. In Z→μμ events selected from proton-proton collision data recorded at √s=8 TeV with the ATLAS experiment at the LHC in 2012, the Z decay muons are replaced by τ leptons from simulated Z →ττ decays at the level of reconstructed tracks and calorimeter cells. The τ lepton kinematics are derived from the kinematics of the original muons. Thus, only the well-understood decays of the Z boson and τ leptons as well as the detector response to the τ decay products are obtained from simulation. All other aspects of the event, such as the Z boson and jet kinematics as well as effects from multiple interactions, are given by the actual data. This so-called τ-embedding method is particularly relevant for Higgs boson searches and analyses in ττ final states, where Z→ττ decays constitute a large irreducible background that cannot be obtained directly from data control samples. In this paper, we discuss the relevant concepts based on the implementation used in the ATLAS Standard Model H→ττ analysis of the full datataset recorded during 2011 and 2012.
- Publication date
- Published through SciTech Connect.
- Journal of Instrumentation 10 09 ISSN 1748-0221 AM
- Aad, G.