message: shift angle phi when trigger near to 0 degrees, needed for DCal
diff: @@ -7531,6 +7531,14 @@ void AliAnaParticleIsolation::StudyTracksUEInCone(AliCaloTrackParticleCorrelatio
  //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  Float_t rad = GetIsolationCut()->Radius(etaTrig, phiTrig, etaTrack, phiTrack);
  + // Angles between trigger and track
  + Double_t dEta = etaTrig - etaTrack;
  + Double_t dPhi = phiTrig - phiTrack;
  +
  + // Shift phi angle when trigger is close to 0 or 360
  + if ( dPhi >= TMath::Pi() ) dPhi-=TMath::TwoPi();
  + if ( dPhi <= -TMath::Pi() ) dPhi+=TMath::TwoPi();
  +
  if ( rad > conesize )
  {
  // Phi band
  @@ -7542,7 +7550,7 @@ void AliAnaParticleIsolation::StudyTracksUEInCone(AliCaloTrackParticleCorrelatio
  phiTrack > (phiTrig-conesize-conesizegap) ) takeIt = kFALSE;
  // Look only half TPC with respect candidate, avoid opposite side jet
  - if ( TMath::Abs(phiTrig-phiTrack) > TMath::PiOver2() ) takeIt = kFALSE;
  + if ( TMath::Abs(dPhi) > TMath::PiOver2() ) takeIt = kFALSE;
  // Within eta cone size
  if ( etaTrack > (etaTrig-conesize) && etaTrack < (etaTrig+conesize) && takeIt )
  @@ -7594,10 +7602,8 @@ void AliAnaParticleIsolation::StudyTracksUEInCone(AliCaloTrackParticleCorrelatio
  // Fill the histograms at +-45 degrees in phi from trigger particle,
  // perpedicular to trigger axis in phi
  //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  - Double_t dEta = etaTrig - etaTrack;
  -
  - Double_t dPhiPlu = phiTrig - phiTrack + TMath::PiOver2();
  - Double_t dPhiMin = phiTrig - phiTrack - TMath::PiOver2();
  + Double_t dPhiPlu = dPhi + TMath::PiOver2();
  + Double_t dPhiMin = dPhi - TMath::PiOver2();
  Double_t argPlu = dPhiPlu*dPhiPlu + dEta*dEta;
  Double_t argMin = dPhiMin*dPhiMin + dEta*dEta;
  