Bug correction: files closed to early

[u/mrichter/AliRoot.git] / HBTAN / AliHBTPair.h

diff --git a/HBTAN/AliHBTPair.h b/HBTAN/AliHBTPair.h
index 9195f2fcadcf47a6c46e90e24417db529522914b..10bedc6d7c00794eeeeb1796836ecdf2106d85c7 100644 (file)
--- a/HBTAN/AliHBTPair.h
+++ b/HBTAN/AliHBTPair.h
@@ -37,6 +37,10 @@ class AliHBTPair: public TObject
    Double_t GetQLong(); //returns Q long 
    Double_t GetQOut(); //returns Q out
    
+   Double_t GetDeltaP(); //return difference of momenta
+   Double_t GetDeltaPx();
+   Double_t GetDeltaPy();
+   Double_t GetDeltaPz();
    
  protected:
    AliHBTParticle* fPart1;  //pointer to first particle
@@ -157,6 +161,7 @@ void AliHBTPair::CalculateInvMassSqr()
 inline 
 void AliHBTPair::CalculateQInvL()
  {
+ //Calculates square root of Qinv
   if (fQInvLNotCalc)
   {
    CalculateDiffs();
@@ -191,4 +196,35 @@ void AliHBTPair::CalculateDiffs()
     }
  }
 
+/****************************************************************/
+inline 
+Double_t AliHBTPair::GetDeltaP() //return difference of momenta
+{
+ CalculateDiffs();
+ return TMath::Sqrt(fPxDiff*fPxDiff + fPyDiff*fPyDiff + fPzDiff*fPzDiff);
+}
+/****************************************************************/
+inline 
+Double_t AliHBTPair::GetDeltaPx()
+ {
+   CalculateDiffs();
+   return fPxDiff;
+ }
+/****************************************************************/
+inline 
+Double_t AliHBTPair::GetDeltaPy()
+ {
+   CalculateDiffs();
+   return fPyDiff;
+ }
+
+/****************************************************************/
+inline 
+Double_t AliHBTPair::GetDeltaPz()
+ {
+   CalculateDiffs();
+   return fPzDiff;
+ }
+
+
 #endif