1. PIXEL patch efficiency
Update of friday’s meeting.
2 configurations of pixel sectors (3 out of 10) are studied for reconstruction of low or high Pt D0’s.
we looked at the normalized distributions (Pt,) of the parent D0 for different cuts on the Pt of their daughters.
patch:
triangle
patch:
joined
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HFT patch acceptance

2. Simulation Generate 100k D0 with :
Flat Pt in [0,5], ||<3,|Vz|<10 cm
Use only fz file --> no reconstruction, etc …
Count :
NN : # of D0 input
N0 : # of D0 after Pt cut for both daughters and|| <1
N1 : # of D0 with above cuts + TPC>10,PXL=2
N2 : # of D0 in triangle configuration
N3 : # of D0 in joined configuration
Then :
Efficiency triangle config. = N2 / N1
Efficiency joined config. = N3 / N1
etc …
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HFT patch acceptance

3. Summary of plots
Slide 4 : phase space of D0 generated with Starsim : NN
Slide 5-7 : application of cut |  |<1 and Pt of daughters : N0
Slide 8-10 : application of cut |  |<1 , TPC>10, PIXL=2, and Pt of daughters : N1
Slide : application of cut |  |<1 , TPC>10, PIXL=2, and Pt of daughters and patch triangle : N2
Slide : application of cut |  |<1 , TPC>10, PIXL=2, and Pt of daughters and patch joined : N3
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HFT patch acceptance

4. Phase space : input (NN)
Pt and  of the D0’s with Starsim
Uniform distributions
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HFT patch acceptance

5. Cut on daughters : ||<1 , Pt>0.3(N0)
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HFT patch acceptance

6. Cut on daughters : ||<1 , Pt>0.8 (N0)
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HFT patch acceptance

7. Cut on daughters : ||<1
 distributions have the same shape.
the cut Pt>.8 removes entries around Pt ~ 1GeV
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HFT patch acceptance

8. Cut on daughters : ||<1 , Pt>0.3, TPC>10,PIXL=2(N1)
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HFT patch acceptance

9. Cut on daughters : ||<1 , Pt>0.8, TPC>10,PIXL=2(N1)
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HFT patch acceptance

10. Cut on daughters:||<1,TPC>10,PIXL=2
 and Pt distributions have similar shapes than in slide 7.
TPC and PIXEL hits cuts just gives a “usable” number of D0’s for this study (same cuts are applied in BFC reconstruction), it does not change the kinematics of the D0’s.
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HFT patch acceptance

11. Cut :||<1, TPC>10,PIXL=2, patch=triangle(N2)
Pt(daughters)>.3
Pt(daughters)>.8
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HFT patch acceptance

12. Cut on daughters :||<1, TPC>10,PIXL=2, patch=triangle
The cut at Pt>.8 removes more entries for Pt~1GeV/c.
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HFT patch acceptance

13. Cut :||<1, TPC>10,PIXL=2, patch=joined(N3)
Pt(daughters)>.3
Pt(daughters)>.8
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HFT patch acceptance

14. Cut :||<1, TPC>10,PIXL=2,patch=joined
The D0’s Pt distribution is not sensible to the cut on the daughters Pt with this PIXL configuration.
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HFT patch acceptance

15. Next : What is the best configuration ? optimization
Run BFC chain (reconstruction) over existing production with patches.
Do the simulation with run 13 : agml
Try to optimize the tracker because we do expect bad performances with TPC+PIXL (searchWindow parameters, to check with StiPulls)
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HFT patch acceptance

16. Item 1. :Optimization wrt TPC sectors
TPC has 12 sectors
PIXEL has 10 sectors
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17. Item 2. : reconstruction with BFC
Option 1 :
mask the pixel Hits in the FastSimMaker (ready)
Run the BFC with no reconstruction in SSD (then no tracking) and no tracking in IST
This will allow us to use the old fz already previous
Cons :
It will not be as the real situation since the material of SSD,IST will be taken into account
Option 2 :
Modify the geometry in GEANT to have the desired pixel geometry + no SSD, no IST (done in starsim)
Generate fz files
Run BFC
Require a bit more work but precise material.
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HFT patch acceptance

18. Option 1.
Only pixelHits that satisfy the condition for this configuration (based on their ladder and layer number
Option 2.
Upgr15 modified
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HFT patch acceptance