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p 0 Reconstruction Efforts

p 0 Reconstruction Efforts. Rob Kroeger Sept 13, 2006. To reconstruct single photon: Xt_Fitter the_Xt_Fitter(myGamCluster); if(the_Xt_Fitter.valid_photon) {E0 = the_Xt_Fitter.Photon_E[0]/1000.; position0 = the_Xt_Fitter.Photon_pos[1];

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p 0 Reconstruction Efforts

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  1. p0 Reconstruction Efforts Rob Kroeger Sept 13, 2006

  2. To reconstruct single photon: Xt_Fitter the_Xt_Fitter(myGamCluster); if(the_Xt_Fitter.valid_photon) {E0 = the_Xt_Fitter.Photon_E[0]/1000.; position0 = the_Xt_Fitter.Photon_pos[1]; To reconstruct 2-bump cluster: Xt_Fitter the_Xt_Fitter(theIndexedPi0Bumps); if(the_Xt_Fitter.valid_Pi0) { E0 = the_Xt_Fitter.Photon_E[0]/1000.; E1 = the_Xt_Fitter.Photon_E[1]/1000.; position0 = the_Xt_Fitter.Photon_pos[0]; position1 = the_Xt_Fitter.Photon_pos[1]; double myCalibEnergy0 = myCalibrator->energyOf(E0,position0); double myCalibEnergy1 = myCalibrator->energyOf(E1,position1); Pi0 Reconstruction

  3. To split one bump: theIndexedBump.insert(std::map<TwoCoordIndex*, EmcBump BbrPtrLess>::value_type (theCurrMaximaTCI, currBump)); bool split_one_bump =true; Xt_Fitter this_Xt_Fitter(theIndexedBump, split_one_bump); if (this_Xt_Fitter.valid_Pi0) { double E0 = this_Xt_Fitter.Photon_E[0]/1000.; double E1 = this_Xt_Fitter.Photon_E[1]/1000.; HepPoint position0 = this_Xt_Fitter.Photon_pos[0]; HepPoint position1 = this_Xt_Fitter.Photon_pos[1]; double myCalibEnergy0 = myGamCalibrator->energyOf(E0,position0); double myCalibEnergy1 = myGamCalibrator->energyOf(E1,position1); } Pi0 Reconstruction

  4. The GFLASH parameterization was used: z Pi0 Reconstruction

  5. WHY?: Pi0 Reconstruction

  6. 2 fit to Grindhammer form Sum over slices in longitude. Pi0 Reconstruction

  7. Each trapazoidally shaped pad devided into eight right-triangles Pi0 Reconstruction

  8. Bogus Fast Shower Parameterization, D. Bernard BABAR Note 476 Transverse distribution approximated by sum of Grindhammer terms:

  9. Photon Reconstruction Angular Reconstruction Error 1 reco compared to prod code Pi0 Reconstruction

  10. Run 4 Pi0 Reconstruction

  11. Run 4 Pi0 Reconstruction

  12. Run 4 Pi0 Reconstruction

  13. Splitting p0 merged to one bump: • Attempt to estimate axis of decay: Pi0 Reconstruction

  14. One Bump merged Pi0 candidates in MergedPi0Tight Pi0 Reconstruction

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