1 / 11

12 th CBM Collaboration Meeting October 13-18, 2008, JINR, Dubna

12 th CBM Collaboration Meeting October 13-18, 2008, JINR, Dubna. Feasibility study of the straw tube detector option for some MUCH stations. A. Zinchenko 1 (L.Naumann 2 , D.Peshekhonov 1 , V.Peshekhonov 1 ) 1 VBLHEP , JINR, Dubna 2 Forschungszentrum Dresden-Rossendorf , FZD. Outline.

signa
Télécharger la présentation

12 th CBM Collaboration Meeting October 13-18, 2008, JINR, Dubna

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. 12th CBM Collaboration MeetingOctober 13-18, 2008, JINR, Dubna Feasibility study of the straw tube detector option for some MUCH stations A. Zinchenko1 (L.Naumann2, D.Peshekhonov1, V.Peshekhonov1) 1VBLHEP, JINR, Dubna 2Forschungszentrum Dresden-Rossendorf, FZD

  2. A.Zinchenko Outline MC Reconstruction Some performance numbers Summary and outlook

  3. A.Zinchenko Geometry Tube diameters: 4, 4, 4, 4 mm; σdrift = 0.2 mm 6 layers per station arranged in 3 doublets: Y, U (+10o), V(-10o)

  4. A.Zinchenko Straw tube occupancy for Au-Au @ 25 GeV

  5. A.Zinchenko Straw tube occupancy for Au-Au @ 25 GeV

  6. A.Zinchenko Track reconstruction • Makes use of L1 Kalman Filter framework (CbmL1SttTrackFinder) • Starts from STS tracks • Tracking strategy: extrapolate track to STT plane and select hits around track with χ2 < 20 (100) • Track accepted if contains hits from all STT doublets

  7. A.Zinchenko Tracking efficiency • Reference tracks: muon tracks from J/ψfound in STS and passing through all layers of STT (producing STT MC points with given MC track ID)

  8. χ2-cut 3 stations 4 stations 3 stations (hit merging) 4 stations (hit merging) 20 1118 / 1194 = 93.6 % 1113 / 1185 = 93.9 % 1113 / 1194 = 93.2 % 1106 / 1185 = 93.3 % 100 1166 / 1194 = 97.7 % 1165 / 1185 = 98.3 % 1166 / 1194 = 97.7 % 1165 / 1185 = 98.3 % J/ψ to dimuon @ 25 GeV w/out background A.Zinchenko

  9. χ2-cut 3 stations 4 stations 3 stations (hit merging) 4 stations (hit merging) 20 1120 / 1195 = 93.7 % 1107 / 1183 = 93.6 % 1110 / 1195 = 92.9 % 1063 / 1183 = 89.9 % 100 1162 / 1195 = 97.2 % 1160 / 1183 = 98.1 % 1162 / 1195 = 97.2 % 1157 / 1183 = 97.8 % J/ψ to dimuon + central Au-Au @ 25 GeV A.Zinchenko

  10. A.Zinchenko Summary • STT occupancy inside MUCH is below 10% in stations 4-6 for central Au-Au for 25 GeV/c • first track reconstruction results from STS seeds (without MUCH tracking) look promising both for 3 and 4 STT stations

  11. A.Zinchenko Outlook • realistic STT geometry • STT software • performance with MUCH tracks

More Related