tree->Draw("deltaVM:event",cut,"", 1234567890, 0);
hist = (TH1*)gPad->GetListOfPrimitives()->FindObject("htemp");
if (hist) {
tree->Draw("deltaVM:event",cut,"", 1234567890, 0);
hist = (TH1*)gPad->GetListOfPrimitives()->FindObject("htemp");
if (hist) {