class AliAnalysisTaskCDMeson: public AliAnalysisTaskSE

 standard constructor (the one which should be used)

 slot in TaskSE must start from 1

 default constructor (should not be used)

Destructor

delete fESDEvent;
delete fESDpid;

CreateOutputObjects

 Executed for every event which passed the physics selection

 PostData

 Controls which event contributes to which map

general protection

 Analyses the observables needed for the gap determination in empty events
 for cross checks same observables are stored for A/C/I(B)-triggers as well

 determines the gap configuration for all gap tagging detectors based on the
 data set which is available

 stores the multiplicity distributions for different gap conditions and
 compares the multiplicity distribution for "normal primary tracks (ITSTPC)"
 and the multiplicity distribution furthermore taking also soft tracks into
 account

 process a two track pair

 determine the PID of the two tracks for full double gap events, store
 the results in another histogram than for the remaining events

 retrieves the MC process type from the AliGenEventHeader and classifies
 them

 fill the MC histograms for different gap conditions. Only real two track
 events are taken into account

 analyses the MC truth and does a gap selection based on the eta values of
 the primaries

 analyses a two track pair from MC truth

 calculates the distance between the vertex obtain from tracks and the
 vertex obtain from spd tracklets
 stores the z position of the primary vertex from tracks