TList* fStackBuffer;//List with stacks
Int_t fBufferSize;//defines number of events used for background mixing
Int_t fNBinsToScale;//defines how many bins are used to calculate scaling factor
TList* fStackBuffer;//List with stacks
Int_t fBufferSize;//defines number of events used for background mixing
Int_t fNBinsToScale;//defines how many bins are used to calculate scaling factor