Reading a TClonesArray

ROOT
1

Hi all,

I filled a TTree with a TClonesArray

TClonesArray *array = new TClonesArray("TLorentzVector", 500);
tree->Branch(branchname.c_str(), &array);

for (i=0; i<N; i++){
  new((*array)[i]) TLorentzVector(px,py,pz,E);
}
tree->MakeClass();

Now I want to read it in using the classes generated by MakeClass(). There I have membervariables for the different components px,py… but no membervariable for the TLorentzVector Object. How can I access that?

Thank’s a lot,
Manuel

2

I found it myself:

the problem was that I used the default splitlevel

That

tree->Branch(branchname.c_str(), &array,32000,0);

solved my problem.