1 / 25

nDST QA for singlemuon analysis

nDST QA for singlemuon analysis. WooJin J. Park Korea University. Santa Fe Workshop, Jun. 22th 2004. Contents. Muon Event Vertex Analysis Vertex dependence Variation within a run Run by Run variation Last Gap Muon Analysis Last Gap Muon and Open charm Last gap muon and total momentum

luisa
Download Presentation

nDST QA for singlemuon analysis

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. nDST QA for singlemuon analysis WooJin J. Park Korea University Santa Fe Workshop, Jun. 22th 2004

  2. Contents • Muon Event Vertex Analysis • Vertex dependence • Variation within a run • Run by Run variation • Last Gap Muon Analysis • Last Gap Muon and Open charm • Last gap muon and total momentum • Comparison of Run3 and Run4 data • Comparison of North and South arm Santa Fe Meeting, Jun. 22th 2004

  3. m p Z vertex Dependence Normalized Muon Biased Z vertex • Filter out decay muon by Z-vertex analysis • Muon yield increasing linearly as function of distance from the absorber, indicates p/K decay muon is detected. Need to find Good Reference Vertex distribution!! • Linear shape of z vertex slope is because ctg~100 [m]. • p/K decay m dominates single muons. • Promptm or punch through background has no vertex dependent. z [cm] MuTr Absorber Beam Beam BBC Cu Fe Santa Fe Meeting, Jun. 22th 2004

  4. Reference Vertex Distribution – Run3 dAu From Ming’s analysis note Santa Fe Meeting, Jun. 22th 2004

  5. Vertex Distribution – Run3 dAu • Use pro.48 Minbias nDST • Total 504 runs • Merge all segments for each run • cut : abs(BBC_Z_vertex)<26 • Fit with single gaussian function Santa Fe Meeting, Jun. 22th 2004

  6. Example Plot – Run3 dAu Run # : 78633 Santa Fe Meeting, Jun. 22th 2004

  7. Variation within a run – Run3 dAu Quite Stable!!! Santa Fe Meeting, Jun. 22th 2004

  8. Variation over all runs – Run3 dAu Santa Fe Meeting, Jun. 22th 2004

  9. Vertex Distribution – Run4 AuAu • Use private repass Minimum Bias nDST samples • Total 162 runs • Use first segment for each run • The number of events per run is 7000 • Fit with single gaussian function Santa Fe Meeting, Jun. 22th 2004

  10. Example Plot – Run4 AuAu Santa Fe Meeting, Jun. 22th 2004

  11. Variation within a run – Run4 AuAu Santa Fe Meeting, Jun. 22th 2004

  12. Run by Run Variation – Run4 AuAu Santa Fe Meeting, Jun. 22th 2004

  13. Last Gap Muon for Open Charm Gap3 Muon Gap4 Muon Last Gap Muon ? • Muon from the open charm has large momentum as compared with other muons • There is every probability that it can be reached to the MuID last gap • But we cannot measure the number of last gap muons directly Santa Fe Meeting, Jun. 22th 2004

  14. Last Gap Muon for Run3 dAu Santa Fe Meeting, Jun. 22th 2004

  15. Last Gap Muon for Run4 AuAu Santa Fe Meeting, Jun. 22th 2004

  16. Number of Gap3, Gap4 and Last Gap Muon – Run4 AuAu Santa Fe Meeting, Jun. 22th 2004

  17. Last Gap Muon vs Total Momentum Santa Fe Meeting, Jun. 22th 2004

  18. Santa Fe Meeting, Jun. 22th 2004

  19. To Do List from now on • Vertex Analysis • Need more study on Run4 AuAu data • Reference vtx distribution : run by run? seg by seg? • Make reference vtx distribution after production • Goodrun list based on vertex analysis • Last Gap Muon Analysis • Need to find good quality cut • Need to understand the correlation between gap3, gap4, and last gap muon Santa Fe Meeting, Jun. 22th 2004

  20. Summary • Vertex Analysis • We can separate decay muon and prompt muon by vertex analysis small variation within a run large variation over the run large variation within a run small variation over the run • Last Gap Muon Analysis • We can separate open charm decay muons and hadron decay muons by last gap muon analysis • Need more study on Run4 data - Run 3 run by run reference - Run 4 need more study!! Santa Fe Meeting, Jun. 22th 2004

  21. BACKUP SLIDES Santa Fe Meeting, Jun. 22th 2004

  22. Estimation of the Number of Last Gap Muon Where, is the number of gap i pion is the number of pion at vertex is the total thicknesses of the absorber is the slope Santa Fe Meeting, Jun. 22th 2004

  23. Estimation of the Number of Last Gap Muon We can get and Santa Fe Meeting, Jun. 22th 2004

  24. Run3 dAu Run4 AuAu Santa Fe Meeting, Jun. 22th 2004

  25. Santa Fe Meeting, Jun. 22th 2004

More Related