7.1 Introduction to Higher-Level Object Analysis Tutorials

This chapter describes the details of the objects associated with physics analyses such as electrons, photons, muons, missing transverse energy (MET) and jets; heavy-quarks, taus. These objects are available in the standard AOD data samples. They are produced using a wide variety of sophisticated reconstruction algorithms which are described in detail in the Offline Guide.

• Track Reconstrcuction and Analysis - shows the available methods for accessing and analyzing the reconstructed tracks, and discusses more advanced operations involving tracks (refitting, accessing track trajectory at different points, etc.).

• Vertex Reconstruction - decribes
  • how to access and analyze the primary vertices,
  • how to find and fit vertices by a user in his analysis code.

• Electron Analysis - shows some simple code for basic analysis of electrons, and contains links for further electron analysis and reco instructions.

• Photon Analysis - shows some simple code for basic analysis of photons, and contains links for further photon analysis and reco instructions.

• Jet Reconstruction is a more complex process and documentation is provided for both Jet object reconstruction.

• MET Analysis - describes MET objects in RECO/AOD/PAT, MET Corrections Type-0/1/2, MET Fileters, MET Uncertainties, and other information relevant for MET analyses.

• Global Muon Reconstruction is a process by which muon tracks are reconstructed using information coming from both the muon spectrometer and the tracker detector.

• Finally, three WorkBook sections, B tagging tau tagging and Particle-Flow tau jet tagging describe how to analyse jets and other composite objects which can be identified as originating from a b quark or a tau lepton.

Review status

Responsible: SudhirMalik
Last reviewed by: KatiLassilaPerini - 19 Feb 2008