Status of Vertexing Tkr Recon vertexing vertex classes

Status of Vertexing " Tkr. Recon " vertexing " vertex classes " user. Alg " coordinate systems " energy sharing " goals for the week INFN-Pisa

INFN-Pisa

Vertexing. . . looks pretty simple: two tracks that's the vertex INFN-Pisa

Vertex Classes T Tkr. Recon /src/. . . Vertex/ Combo/. . . Kal. Vtx/ Tkr. Kal. Vtx. Alg. h T Tkr. Kal. Vtx. Alg. cxx Tkr. Kal. Vtx. Par. h T Tkr. Kal. Vtx. Par. cxx " " need to define a Vertex base class and/or a collection Tkr. Vtx. Col INFN-Pisa

user. Alg v 3 r 0 p 0 ntuple. Writer. Svc v 2 r 0 Gleam v 2 r 1 INFN-Pisa

Coordinates (x, xslope, y, yslope) ® (x, y, z, J, j) track yslope xslope J j (x, y, z) INFN-Pisa

Energy sharing reconstructed g incoming g " AGILE method: uses multiple scattering of the individual tracks " Bill Atwood: essentially same method. He reported results. For normal 100 Me. V g 's: 100 Me. V ± 40 Me. V. Angular error 37 mrad ® 26 mrad. " Bill Atwood II: thinks about the best way to combine the parameters and errors on two tracks to get the best estimate of the parameters of the photon. INFN-Pisa

Goals for the week " try running version of the code (as a Gaudi Algorithm)? try new design on Tkr. Combo. Vtx " decision between user. Alg and tkr. App " representation/parametrisation of a track " error propagation along the track " Tracker Reconstruction Action Item List INFN-Pisa