This package contains the algorithms used for TileCal cosmic muons reconstruction, analysis, and trigger simulation.

Author: Jose Maneira manei.nosp@m.ra@l.nosp@m.ip.pt

Algorithms

The following algorithms are present in this package:

TileMuonFitter: reads TileCells, fitting a straight muon track through and calculating horizontal plane crossing time. More details in https://twiki.cern.ch/twiki/bin/view/Atlas/TileMuonFitter. Two different track finding methods are used: a standard chi-square Minuit-based algorithm, and a "pattern-recongnition-style" Hough transform based one (by Luciano Filho). Two types of output are created in StoreGate: a "non-Tile-dependent" Commission/ComTime object for retrieval by LAr and Monitoring packages, and a TileEvent/TileCosmicMuon object with much more detailed information, such as the energy in the cells around the track, the path length travelled, etc. Until February 2009, TMF read TileRawChannels and created its own cell vector. This was very slow and is now fixed by reading the cells from CaloCellContainer.
TileMuonTrackDistance: is an auxiliary class for the Minuit-based TileMuonFitter algorithm. It provides the chi-square function for minimization od the orthogonal distances from the cell centers to the track.
CBNTAA_TileMuonFitter: creates an AthenaAware CBNT ntuple with TileMuonFitter information.
TileCosmicsTrigger: used in simulation to emulate the standalone Tile cosmics trigger. It reads the container of TileTTL1 objects (see TileEvent and TileSimAlgs), apllies the trigger logic according to the board configuration and produces a TileTrigger object, put in the StoreGate. More details on the trigger logic, usage, etc, can be found here: https://twiki.cern.ch/twiki/bin/view/Main/TileCosmicsTrigger The output can be put in CBNTAA format (see the TileRec package).