P14 Realignment

Draft D0 Note

Overview

During testing of p14, it was discovered by Higgs group (Avto Kharchilava, Kazu Hanagaki, Marian Zdrazil, and others) that there was a curvature dependent phi asymmetry in E/p and Z mass. A B=0 special run was taken and used by Guennadi Borissov to realign the cft and smt. This greatly reduced the problem. Previous alignments had used curving tracks, which are not very sensitive to the type of misalignment that was present.

Geometry files

• Gaston's geometry:
  • d0_v9_cftalign1_smtalign1_smtcft1_allmuon_*.evpack
• Guennadi's old geometry:
  • d0_v9_cftalign2_smtalign2_smtcft2_allmuonfixed_*.evpack
• Guennadi's new (B=0) geometry:
  • d0_v10_cftalign3_smtalign3_allmuonfixed_*.evpack

Z mass plots

• Comparing positive and negative curvature tracks for different geometries.
  • Gaston's geometry.
    • Z mass.
    • Z width.
  • Guennadi's old geometry.
    • Z mass.
    • Z width.
  • Guennadi's new geometry.
    • Z mass.
    • Z width.
• Comparing Gaston's and Guennadi's old geometry.
  • Positive curvature.
    • Z mass.
    • Z width.
  • Negative curvature.
    • Z mass.
    • Z width.
• Curvature-averaged Z mass in 10 phi slices for different geometries.
  • Guennadi's old geometry
  • Guennadi's new geometry
• Phi- and curvature averaged Z mass for different geometries.
  • Gaston's geometry.
  • Guennadi's old geometry.
  • Guennadi's old geometry w/curvature correction.
  • Guennadi's new geometry.
• Phi- and curvature averaged Z mass for different geometries (larger sample).
  • Guennadi's old geometry.
  • Guennadi's old geometry w/curvature correction.
  • Guennadi's new geometry.

E/p plots

• E/p in ten phi slices, separated by curvature, default geometry.
  • Phi slice 1.
  • Phi slice 2.
  • Phi slice 3.
  • Phi slice 4.
  • Phi slice 5.
  • Phi slice 6.
  • Phi slice 7.
  • Phi slice 8.
  • Phi slice 9.
  • Phi slice 10.
• E/p in ten phi slices, separated by curvature, w/ curvature correction.
  • Phi slice 1.
  • Phi slice 2.
  • Phi slice 3.
  • Phi slice 4.
  • Phi slice 5.
  • Phi slice 6.
  • Phi slice 7.
  • Phi slice 8.
  • Phi slice 9.
  • Phi slice 10.
• E/p in ten phi slices, separated by curvature, new geometry.
  • Phi slice 1.
  • Phi slice 2.
  • Phi slice 3.
  • Phi slice 4.
  • Phi slice 5.
  • Phi slice 6.
  • Phi slice 7.
  • Phi slice 8.
  • Phi slice 9.
  • Phi slice 10.
• Mean E/p vs. phi for both curvatures.
  • Default geometry.
  • With curvature correction.
  • New geometry.
• Phi- and curvature-averaged E/p.
  • Default geometry.
  • With curvature correction.
  • New geometry.

B=0 tracking plots

• All tracks (default geometry).
• Global tracks (default geometry).
• CFT only (refit, default geometry).
• CFT barrels 3-8 only (refit, default geometry).
• SMT only (refit, default geometry).
• CFT only (corrected geometry).
• CFT only (new Guennadi geometry).
• Global tracks (new Guennadi geometry).
• Calculated CFT offsets.