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SVD software meeting summary Jan. 14 th , 2004

SVD software meeting summary Jan. 14 th , 2004. Data quality (Ishino) Alignment and IP resolution (Kibayashi) Gsim-svd status (T.Hara) Trak status (Karim) via e-mail Tag Vertex (T.Higuchi) Trigger simulator (K.Hara) MC generation (Shibata). Data quality (Ishino). Run 48. Run 90.

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SVD software meeting summary Jan. 14 th , 2004

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  1. SVD software meeting summaryJan. 14th, 2004 • Data quality (Ishino) • Alignment and IP resolution (Kibayashi) • Gsim-svd status (T.Hara) • Trak status (Karim) via e-mail • Tag Vertex (T.Higuchi) • Trigger simulator (K.Hara) • MC generation (Shibata)

  2. Data quality (Ishino) Run 48 Run 90 IP resolution of di-muon events. ~25mm Typical much statistics run Run 1050

  3. P side cl energy N side cl energy Calibration constant was changed run 320 and 606. Very short run #1575

  4. Alignment and IP resolution (Kibayashi) A new CDC constant that non-uniformity of the magnetic field is taken into account is introduced. She compared helix systematic parameter correlation and helix parameter resolutions between new and old CDC constants. No significant difference is found. She divided the cosmic ray muon data into positive and negative charged muons and compared IP resolution. It is found that the coefficient of the multiple scattering term of negative charged tracks (42.8) is larger than that of positive tracks (31.0) for dr. On the other hand, dz resolutions are not different so much (34.7 and 30.5).

  5. gsim-svd (T.Hara) For gsim-svd, (1) he will implement delta rays, (2)adjust the spatial resolution on DSSD, and (3)tune geometry of SVD2. The first and second items are required since the spatial resolution between data and MC is not comparable. For item (2), we need to know momentum dependence of the spatial intrinsic resolution; we have to estimate the resolution with cosmic ray muons and di-muon events with the magnetic field. Sasa-san is now studying it. trak (Karim) The subject of trak improvement is similar that of gsim-svd; he has to know spatial resolution and material budget of SVD2. The latter is important since it affects pull distributions of low momentum tracks. The material budget of the support rib has to be tuned.

  6. Tag side vertex (T.Higuchi) He has started studying tag side vertex. Since the current tag side vertex algorithm does not consider the charm meson flight, he will implement virtual D meson method. The goal of vertex resolution was estimated to be 70mm. Trigger simulators (K.Hara) An L0 simulator is ready for CVS commit. The performance of an L1 simulator is begin checked using real data. MC production (Shibata) He has started producing MC samples of control sample events, such as D*pi, D*rho, D*ℓn

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