void without() {

  TChain *ttree;

  ttree = new TChain ("Tree");

  ttree->Add("/castor/cern.ch/user/b/bifani/na48_2/pigg/sc/SS0-00/0.root");

  ttree->Draw("cog->Mag()","tw_m1tp&&1&&nmuon==0&&trk_p->P()>10.&&trk_dch1->Mag()>15.&&trk_dch1->Mag()<100.&&trk_cls_e/trk_p->P()<0.8&&min(g0_p->E(),g1_p->E())>5.&&pk_dist->Z()>10.&&vtx->Z()>-2000.&&vtx->Z()<8000.&&mfake<.460&&trk_dch4->Mag()>15.&&trk_dch4->Mag()<100.&&g_dist>40.&&g_cls_dist>10.&&g_dim<3.&&g_r_flange>0.&&abs(pigg->E()-60.)<5.&&cog->Mag()<2.&&cda<2.&&abs(vtx->Z()-nvtx_z)<200.&&abs(pigg->M()-.493677)<.02");

  return;

}

void with() {

  TChain *ttree;

  ttree = new TChain ("Tree");

  ttree->Add("rfio:///castor/cern.ch/user/b/bifani/na48_2/pigg/sc/SS0-00/0.root");

  ttree->Draw("cog->Mag()","tw_m1tp&&1&&nmuon==0&&trk_p->P()>10.&&trk_dch1->Mag()>15.&&trk_dch1->Mag()<100.&&trk_cls_e/trk_p->P()<0.8&&min(g0_p->E(),g1_p->E())>5.&&pk_dist->Z()>10.&&vtx->Z()>-2000.&&vtx->Z()<8000.&&mfake<.460&&trk_dch4->Mag()>15.&&trk_dch4->Mag()<100.&&g_dist>40.&&g_cls_dist>10.&&g_dim<3.&&g_r_flange>0.&&abs(pigg->E()-60.)<5.&&cog->Mag()<2.&&cda<2.&&abs(vtx->Z()-nvtx_z)<200.&&abs(pigg->M()-.493677)<.02");

  return;

}