1 / 11

Improving Non-Prompt Track Reconstruction with Z Segmentation Update

Lori Stevens from SLAC/UCSC presents enhancements in reconstruction of non-prompt tracks by updating the z segmentation, resulting in improved efficiency and reduced fake tracks. The presentation compares outcomes before and after the fix using simulation data from ILC. Key studies are mentioned, along with the potential influence of a 10cm segmentation on 4-hit tracks. HelicalTrackFitter enhancements discussed, including fitting methods and utilization of z segmentation code from Rich Partridge. Next presentation scheduled for 8/31/07.

minor
Télécharger la présentation

Improving Non-Prompt Track Reconstruction with Z Segmentation Update

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Z Segmentation Update(improving reconstruction of non-prompt tracks with the SiD) Lori Stevens (SLAC/UCSC) August 21, 2007 ILC Simulation Reconstruction Meeting

  2. AxialBarrelTrackFinder1 Bug • Phi requirement: phi coordinate of all hits must be within π/2 of each other • Bug in my version of code caused phi requirement to be too restrictive • Fixed bug and found improvement in both efficiency and number of fake tracks when using z segmentation

  3. Comparing Z Segmentation Before and After Fix Sample: pythiaZPolebbbar-0-1000_SLIC_v1r9p3_sidaug05.slcio

  4. Some other studies (collisions at 500GeV) • panpyuds_nobeam_nobrem-1-500_SLIC_ v2r0p6_sidaug05.slcio • panpyuds_nobeam_nobrem-3-500_SLIC_ v2r0p6_sidaug05.slcio • panpyuds_nobeam_nobrem-7-500_SLIC_ v2r0p6_sidaug05.slcio

  5. panpyuds_nobeam_nobrem-1-500_SLIC_v2r0p6_sidaug05.slcio

  6. panpyuds_nobeam_nobrem-3-500_SLIC_v2r0p6_sidaug05.slcio

  7. panpyuds_nobeam_nobrem-7-500_SLIC_v2r0p6_sidaug05.slcio

  8. Combining the 3 data sets

  9. 1cm 5cm 10cm 30cm 1cm 5cm 10cm 30cm ZPole vs. 500GeV collisions

  10. Conclusion • The use 4 hit tracks may depend on the jet energy • Will 10cm segmentation make a difference? • Tyler Rice and Chris Meyer are doing a study using variable segmentation in Dima Onoprienko's Garfield Tracker…this may help find some answers

  11. HelicalTrackFitter improvements • Does not currently fit hits in tracker barrel • Improving to fit hits in all regions • Will use various fitting methods such as circle fitting, line fitting, 2D hit consistency checks, and Rich Partridge’s z segmentation code • Presentation next Friday (8/31/07)

More Related