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00023 #include "SD0TagAlg/K0pi0.h"
00024 #include "SD0TagAlg/SingleBase.h"
00025
00026
00027 K0pi0::K0pi0()
00028 {}
00029
00030 K0pi0::~K0pi0()
00031 {}
00032
00033
00034 void K0pi0::MTotal(double event,SmartDataPtr<EvtRecTrackCol> evtRecTrkCol, Vint iGood,Vint
00035 iGam, double Ebeam, int PID_flag, int Charge_candidate_D)
00036 {
00037
00038 int nGood=iGood.size();
00039 int nGam=iGam.size();
00040
00041 iGoodtag.clear();
00042 iGamtag.clear();
00043
00044 double mass_bcgg,delE_tag_temp;
00045 int m_chargetag,m_chargepi1,m_chargepi2;
00046 int ika_temp,ipi1_temp,ipi2_temp,ipi3_temp, iGam1_temp, iGam2_temp;
00047 HepLorentzVector pddd;
00048 HepLorentzVector pddd_temp;
00049
00050 IDataProviderSvc* eventSvc = NULL;
00051 Gaudi::svcLocator()->service("EventDataSvc", eventSvc);
00052 SmartDataPtr<EvtRecEvent> evtRecEvent(eventSvc,EventModel::EvtRec::EvtRecEvent);
00053 SmartDataPtr<Event::EventHeader> eventHeader(eventSvc,"/Event/EventHeader");
00054
00055 int runNo=eventHeader->runNumber();
00056 int rec=eventHeader->eventNumber();
00057
00058 double xecm=2*Ebeam;
00059
00060 k0pi0md=false;
00061 double tagmode=0;
00062
00063 if((evtRecEvent->totalCharged() < 2||nGam<2)){ return; }
00064
00065 double ecms = xecm;
00066
00067 ISimplePIDSvc* simple_pid;
00068 Gaudi::svcLocator()->service("SimplePIDSvc", simple_pid);
00069
00070 double deltaE_tem = 0.20;
00071 int ncount1 = 0;
00072
00073 Hep3Vector xorigin(0,0,0);
00074 HepSymMatrix xoriginEx(3,0);
00075 IVertexDbSvc* vtxsvc;
00076 Gaudi::svcLocator()->service("VertexDbSvc", vtxsvc);
00077 if(vtxsvc->isVertexValid())
00078 {
00079 double* dbv = vtxsvc->PrimaryVertex();
00080 double* vv = vtxsvc->SigmaPrimaryVertex();
00081 xorigin.setX(dbv[0]);
00082 xorigin.setY(dbv[1]);
00083 xorigin.setZ(dbv[2]);
00084
00085 xoriginEx[0][0] = vv[0] * vv[0];
00086 xoriginEx[1][1] = vv[1] * vv[1];
00087 xoriginEx[2][2] = vv[2] * vv[2];
00088
00089 }
00090
00091 double xv=xorigin.x();
00092 double yv=xorigin.y();
00093 double zv=xorigin.z();
00094
00095 HepPoint3D point0(0.,0.,0.);
00096 HepPoint3D IP(xorigin[0],xorigin[1],xorigin[2]);
00098 HepLorentzVector p2gfit;
00099 HepLorentzVector p2gg;
00100
00101 for(int i = 0; i < evtRecEvent->totalCharged(); i++) {
00102 EvtRecTrackIterator itTrk = evtRecTrkCol->begin() + i;
00103
00104 int ipi1= (*itTrk)->trackId();
00105
00106 if(!(*itTrk)->isMdcKalTrackValid()) continue;
00107 RecMdcKalTrack* mdcKalTrk1 = (*itTrk)->mdcKalTrack();
00108 RecMdcKalTrack::setPidType(RecMdcKalTrack::pion);
00109
00110 m_chargepi1=mdcKalTrk1->charge();
00111 if(m_chargepi1 != 1) continue;
00112
00114 HepVector a1 = mdcKalTrk1->getZHelix();
00115 HepSymMatrix Ea1 = mdcKalTrk1->getZError();
00116
00117 VFHelix helixip3_1(point0,a1,Ea1);
00118 helixip3_1.pivot(IP);
00119 HepVector vecipa1 = helixip3_1.a();
00120
00121 double dr1 = fabs(vecipa1[0]);
00122 double dz1 = fabs(vecipa1[3]);
00123 double costheta1 = cos(mdcKalTrk1->theta());
00124
00125 if ( dr1 >= 15.0) continue;
00126 if ( dz1 >= 25.0) continue;
00127 if ( fabs(costheta1) >= 0.93) continue;
00129 WTrackParameter pip(xmass[2],mdcKalTrk1->getZHelix(),mdcKalTrk1->getZError() );
00130
00131
00132
00133
00134 for(int j = 0; j < evtRecEvent->totalCharged();j++) {
00135 EvtRecTrackIterator itTrk = evtRecTrkCol->begin() + j;
00136
00137 int ipi2= (*itTrk)->trackId();
00138 if(ipi1==ipi2) continue;
00139
00140 if(!(*itTrk)->isMdcKalTrackValid()) continue;
00141 RecMdcKalTrack* mdcKalTrk2 = (*itTrk)->mdcKalTrack();
00142 RecMdcKalTrack::setPidType(RecMdcKalTrack::pion);
00143
00144 m_chargepi2=mdcKalTrk2->charge();
00145 if((m_chargepi1 + m_chargepi2) != 0) continue;
00146
00148 HepVector a2 = mdcKalTrk2->getZHelix();
00149 HepSymMatrix Ea2 = mdcKalTrk2->getZError();
00150 VFHelix helixip3_2(point0,a2,Ea2);
00151 helixip3_2.pivot(IP);
00152 HepVector vecipa2 = helixip3_2.a();
00153
00154 double dr2 = fabs(vecipa2[0]);
00155 double dz2 = fabs(vecipa2[3]);
00156 double costheta2 = cos(mdcKalTrk2->theta());
00157 if ( dr2 >= 15.0) continue;
00158 if ( dz2 >= 25.0) continue;
00159 if ( fabs(costheta2) >= 0.93) continue;
00161 WTrackParameter pim(xmass[2],mdcKalTrk2->getZHelix(),mdcKalTrk2->getZError() );
00162
00163 HepVector pip_val = HepVector(7,0);
00164 HepVector pim_val = HepVector(7,0);
00165 pip_val = pip.w();
00166 pim_val = pim.w();
00167 HepLorentzVector ptrktagk0(pip_val[0]+pim_val[0],pip_val[1]+pim_val[1],pip_val[2]+pim_val[2],pip_val[3]+pim_val[3]);
00168 double m_xmtagk0_tem = ptrktagk0.mag();
00169 if(fabs(ptrktagk0.m()-0.498)>0.1) continue;
00170
00171 HepPoint3D vx(xorigin.x(), xorigin.y(), xorigin.z());
00172 HepSymMatrix Evx(3, 0);
00173 double bx = 1E+6; Evx[0][0] = bx*bx;
00174 double by = 1E+6; Evx[1][1] = by*by;
00175 double bz = 1E+6; Evx[2][2] = bz*bz;
00176 VertexParameter vxpar; vxpar.setVx(vx); vxpar.setEvx(Evx);
00177
00178 VertexFit *vtxfit0 = VertexFit::instance();
00179 vtxfit0->init();
00180 vtxfit0->AddTrack(0, pip);
00181 vtxfit0->AddTrack(1, pim);
00182 vtxfit0->AddVertex(0, vxpar, 0, 1);
00183 if(!(vtxfit0->Fit(0))) continue;
00184 vtxfit0->Swim(0);
00185 vtxfit0->BuildVirtualParticle(0);
00186 WTrackParameter wksp = vtxfit0->wtrk(0);
00187 WTrackParameter wksm = vtxfit0->wtrk(1);
00188 WTrackParameter wks_Trk = vtxfit0->wVirtualTrack(0);
00189 VertexParameter wks_var = vtxfit0->vpar(0);
00190
00191 SecondVertexFit *vtxfit = SecondVertexFit::instance();
00192 vtxfit->init();
00193 vxpar.setEvx(xoriginEx);
00194 vtxfit->setPrimaryVertex(vxpar);
00195 vtxfit->AddTrack(0, wks_Trk);
00196 vtxfit->setVpar(wks_var);
00197 if(!vtxfit->Fit()) continue;
00198
00199 if(vtxfit->chisq() > 999.) continue;
00200 if(vtxfit->decayLength()<0.0) continue;
00201
00202 double m_massks1_tem = vtxfit->p4par().m();
00203 if(m_massks1_tem < 0.485 || m_massks1_tem > 0.515) continue;
00204 HepLorentzVector p4kstag = vtxfit->p4par();
00205 p4kstag.boost(-0.011,0,0);
00206 WTrackParameter para_ks = vtxfit0->wVirtualTrack(0);
00207
00208 for(int m = 0; m < nGam-1; m++) {
00209 if(iGam[m]==-1) continue;
00210 RecEmcShower *g1Trk = (*(evtRecTrkCol->begin()+iGam[m]))->emcShower();
00211 double eraw1 = g1Trk->energy();
00212 double phi1 = g1Trk->phi();
00213 double the1 = g1Trk->theta();
00214 HepLorentzVector ptrkg1,ptrkg10,ptrkg12;
00215 ptrkg1.setPx(eraw1*sin(the1)*cos(phi1));
00216 ptrkg1.setPy(eraw1*sin(the1)*sin(phi1));
00217 ptrkg1.setPz(eraw1*cos(the1));
00218 ptrkg1.setE(eraw1);
00219 ptrkg10 = ptrkg1;
00220 ptrkg12 = ptrkg1.boost(-0.011,0,0);
00221
00222 for(int n = m+1; n < nGam; n++) {
00223 if(iGam[n]==-1) continue;
00224 RecEmcShower *g2Trk = (*(evtRecTrkCol->begin()+iGam[n]))->emcShower();
00225 double eraw2 = g2Trk->energy();
00226 double phi2 = g2Trk->phi();
00227 double the2 = g2Trk->theta();
00228 HepLorentzVector ptrkg2,ptrkg20,ptrkg22;
00229 ptrkg2.setPx(eraw2*sin(the2)*cos(phi2));
00230 ptrkg2.setPy(eraw2*sin(the2)*sin(phi2));
00231 ptrkg2.setPz(eraw2*cos(the2));
00232 ptrkg2.setE(eraw2);
00233 ptrkg20 = ptrkg2;
00234 ptrkg22 = ptrkg2.boost(-0.011,0,0);
00235
00237 HepLorentzVector ptrkpi0;
00238 ptrkpi0 = ptrkg12+ptrkg22;
00239 double m_xmpi0_tem = ptrkpi0.m();
00240 if(m_xmpi0_tem>0.150||m_xmpi0_tem<0.115) continue;
00242 bool IsEndcap1 = false; bool IsEndcap2 = false;
00243 if(fabs(cos(the1)) > 0.86 && fabs(cos(the1)) < 0.92) IsEndcap1 = true;
00244 if(fabs(cos(the2)) > 0.86 && fabs(cos(the2)) < 0.92) IsEndcap2 = true;
00245 if(IsEndcap1 && IsEndcap2) continue;
00247 KalmanKinematicFit * kmfit = KalmanKinematicFit::instance();
00248 kmfit->init();
00249 kmfit->setChisqCut(2500);
00250 kmfit->AddTrack(0, 0.0, g1Trk);
00251 kmfit->AddTrack(1, 0.0, g2Trk);
00252 kmfit->AddResonance(0, mpi0, 0, 1);
00253
00254 kmfit->Fit(0);
00255 kmfit->BuildVirtualParticle(0);
00256
00257 double pi0_chisq = kmfit->chisq(0);
00258 if ( pi0_chisq >= 2500) continue;
00259 HepLorentzVector p2gfit = kmfit->pfit(0) + kmfit->pfit(1);
00260 p2gfit.boost(-0.011,0,0);
00262
00263 HepVector ksp_val = HepVector(7,0);
00264 HepVector ksm_val = HepVector(7,0);
00265 ksp_val = wksp.w();
00266 ksm_val = wksm.w();
00267
00268 HepLorentzVector P_KSP(ksp_val[0],ksp_val[1],ksp_val[2],ksp_val[3]);
00269 HepLorentzVector P_KSM(ksm_val[0],ksm_val[1],ksm_val[2],ksm_val[3]);
00270
00271 P_KSP.boost(-0.011,0,0);
00272 P_KSM.boost(-0.011,0,0);
00273 pddd = p4kstag + p2gfit;
00274
00275 double pk0pi0=pddd.rho();
00276
00277 double temp1 = (ecms/2)*(ecms/2)-pk0pi0*pk0pi0 ;
00278 if(temp1<0) temp1 =0;
00279 double mass_bc_tem = sqrt(temp1);
00280 if(mass_bc_tem < 1.82 || mass_bc_tem > 1.89) continue;
00281
00282 double delE_tag_tag = ecms/2-pddd.e();
00283
00284 if(fabs(delE_tag_tag)<deltaE_tem){
00285 deltaE_tem = fabs(delE_tag_tag);
00286 delE_tag_temp = delE_tag_tag;
00287 mass_bcgg = mass_bc_tem;
00288
00289 pddd_temp = pddd;
00290
00291 ipi1_temp=ipi1;
00292 ipi2_temp=ipi2;
00293
00294 iGam1_temp = iGam[m];
00295 iGam2_temp = iGam[n];
00296
00297 ncount1 = 1;
00298 }
00299 }
00300 }
00301 }
00302 }
00303
00304 if(ncount1 == 1){
00305 tagmode=18;
00306 if(m_chargetag<0) tagmode=-18;
00307 tagmd=tagmode;
00308 mass_bc = mass_bcgg;
00309 delE_tag = delE_tag_temp;
00310 cqtm = 0.0;
00311
00312 iGoodtag.push_back(ipi1_temp);
00313 iGoodtag.push_back(ipi2_temp);
00314 iGamtag.push_back(iGam1_temp);
00315 iGamtag.push_back(iGam2_temp);
00316 iGamtag.push_back(9999);
00317 iGamtag.push_back(9999);
00318
00319 ptag = pddd_temp;
00320
00321 k0pi0md = true;
00322
00323 }
00324 }
00325
00326
00327