message: ATO-340 - using sqrt parameterized pt spectra for flat pt/qpt downsampling
  * removing effective parameterization
  TODO:
  * add sqrt(s) as an paremeter to task - or get it from the ESD?
  ** currently hardwired
  * cleanup the code after the test
diff: @@ -136,11 +136,10 @@ class AliAnalysisTaskFilteredTree : public AliAnalysisTaskSE {
  Int_t GetMCInfoTrack(Int_t label, std::map<std::string,float> &trackInfoF, std::map<std::string,TObject*> &trackInfoO); //TODO- test before enabling
  Int_t GetMCInfoKink(Int_t label, std::map<std::string,float> &kinkInfoF, std::map<std::string,TObject*> &kinkInfoO); // TODO
  static Int_t GetMCTrackDiff(const TParticle &particle, const AliExternalTrackParam &param, TClonesArray &trackRefArray, TVectorF &mcDiff); //TODO test before enabling
  - ///
  - static Int_t PtSelectionMask(Double_t pt, Double_t downscalePt=0.005, Double_t downscaleQPt=0.001 , Double_t ptMPV=0.28, Double_t sigma=0.1);
  -
  + /// sqrt s - mass dependent downsampling trigger (pt spectra as parameterized in https://iopscience.iop.org/article/10.1088/2399-6528/aab00f/pdf)
  + static Double_t TsalisCharged(Double_t pt, Double_t mass, Double_t sqrts);
  + static Int_t DownsampleTsalisCharged(Double_t pt, Double_t factorPt, Double_t factor1Pt, Double_t sqrts=5020, Double_t mass=0.2);
  private:
  -
  AliESDEvent *fESD; //! ESD event
  AliMCEvent *fMC; //! MC event
  AliESDfriend *fESDfriend; //! ESDfriend event
  @@ -166,10 +165,12 @@ class AliAnalysisTaskFilteredTree : public AliAnalysisTaskSE {
  Double_t fLowPtTrackDownscaligF; // low pT track downscaling factor
  Double_t fLowPtV0DownscaligF; // low pT V0 downscaling factor
  Double_t fFriendDownscaling; // friend info downscaling )absolute value used), Modes>=1 downscaling in respect to the amount of tracks, Mode<=-1 (downscaling in respect to the data volume)
  + Double_t fSqrtS; // sqrt(s) used for downsampling to approximate spectra function
  + Double_t fChargedMass; // mass used for downsampling to approximate spectra function
  Double_t fProcessAll; // Calculate all track properties including MC
  Bool_t fProcessCosmics; // look for cosmic pairs from random trigger
  - Bool_t fProcessITSTPCmatchOut; // swittch to process ITS/TPC standalone tracks
  + Bool_t fProcessITSTPCmatchOut; // switch to process ITS/TPC standalone tracks
  TTree* fHighPtTree; //! list send on output slot 0
  TTree* fV0Tree; //! list send on output slot 0
  