[PWGLF] daughter momentum from v0 table (#8939)

Co-authored-by: junleekim <junleekim@maccbookjunlee2024.dyndns.cern.ch>

Author: jikim1290

PWGLF/Tasks/Strangeness/lambdapolarization.cxx

@@ -524,12 +524,12 @@ struct lambdapolarization {
         continue;
 
       if (LambdaTag) {
-        ProtonVec = ROOT::Math::PxPyPzMVector(postrack.px(), postrack.py(), postrack.pz(), massPr);
-        PionVec = ROOT::Math::PxPyPzMVector(negtrack.px(), negtrack.py(), negtrack.pz(), massPi);
+        ProtonVec = ROOT::Math::PxPyPzMVector(v0.pxpos(), v0.pypos(), v0.pzpos(), massPr);
+        PionVec = ROOT::Math::PxPyPzMVector(v0.pxneg(), v0.pyneg(), v0.pzneg(), massPi);
       }
       if (aLambdaTag) {
-        ProtonVec = ROOT::Math::PxPyPzMVector(negtrack.px(), negtrack.py(), negtrack.pz(), massPr);
-        PionVec = ROOT::Math::PxPyPzMVector(postrack.px(), postrack.py(), postrack.pz(), massPi);
+        ProtonVec = ROOT::Math::PxPyPzMVector(v0.pxneg(), v0.pyneg(), v0.pzneg(), massPr);
+        PionVec = ROOT::Math::PxPyPzMVector(v0.pxpos(), v0.pypos(), v0.pzpos(), massPi);
       }
       LambdaVec = ProtonVec + PionVec;
       LambdaVec.SetM(massLambda);