void CreateFriendTrees(TString scriptDirectory = ""){

	TString selectorName = scriptDirectory;
	selectorName+="omega2pi_selector.C";

	cout << "=====================================================" << endl;
	cout << "========      Processing Signal Tree         ========" << endl;
	cout << "=====================================================" << endl;
        TFile *signalFile = new TFile("tree_omega2pi.root");
	TTree *signalTree = signalFile->Get("omega2pi_Tree");
        signalTree->Process(selectorName, "Signal");

	cout << "=====================================================" << endl;
	cout << "========      Processing Background Tree     ========" << endl;
	cout << "=====================================================" << endl;
	TFile *backgroundFile = new TFile("tree_omega2pi_background.root");
	TTree *backgroundTree = backgroundFile->Get("omega2piBackground_Tree");
	backgroundTree->Process(selectorName, "Background");
}