void dca(){
	new TFile("P02gd_Minbias_uDst.txt.root");
	//new TFile("P02ge_productionCentral.tree.root");
	uDst->Draw("pPairs.pPartDca>>dc(25,0,0.01)","rVertex>4 && zVertex>50 && pt>0 && pt <0.1 && abs(pPairs.pionH.yRap)>0.1 && abs(pPairs.pionH.yRap)<1.0 && qTot == 0 && nTot==2 && pPairs.pionH.mInv > 0.55 && pPairs.pionH.mInv <0.92 && nPrim==2");
	//uDst->Draw("pPairs.pPartDca>>dc(25,0,0.001)","qTot==0 && rVertex<4 && zVertex<50");
	gStyle->SetOptStat(1111111);	
	}