added Collins Soper frame and renamed some configurables

Author: sawankumawat

PWGLF/Tasks/Resonances/higherMassResonances.cxx

@@ -721,7 +721,7 @@ struct HigherMassResonances {
     // }
 
     // CS Frame
-    zAxisCS = ROOT::Math::XYZVectorF((beam1CM - beam2CM)).Unit();
+    zAxisCS = ROOT::Math::XYZVectorF((beam1CM.Unit() - beam2CM.Unit())).Unit();
     yAxisCS = ROOT::Math::XYZVectorF(beam1CM.Cross(beam2CM)).Unit();
     xAxisCS = ROOT::Math::XYZVectorF(yAxisCS.Cross(zAxisCS)).Unit();
     double cosThetaStarCS = zAxisCS.Dot(v1CM);