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 10/11/14 HFT patch acceptance

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 … 10/11/14 HFT patch acceptance

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 11-12 : application of cut |  |<1 , TPC>10, PIXL=2, and Pt of daughters and patch triangle : N2 Slide 13-14 : application of cut |  |<1 , TPC>10, PIXL=2, and Pt of daughters and patch joined : N3 10/11/14 HFT patch acceptance

Phase space : input (NN) Pt and  of the D0’s with Starsim Uniform distributions 10/11/14 HFT patch acceptance

Cut on daughters : ||<1 , Pt>0.3(N0) 10/11/14 HFT patch acceptance

Cut on daughters : ||<1 , Pt>0.8 (N0) 10/11/14 HFT patch acceptance

Cut on daughters : ||<1  distributions have the same shape. the cut Pt>.8 removes entries around Pt ~ 1GeV 10/11/14 HFT patch acceptance

Cut on daughters : ||<1 , Pt>0.3, TPC>10,PIXL=2(N1) 10/11/14 HFT patch acceptance

Cut on daughters : ||<1 , Pt>0.8, TPC>10,PIXL=2(N1) 10/11/14 HFT patch acceptance

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. 10/11/14 HFT patch acceptance

Cut :||<1, TPC>10,PIXL=2, patch=triangle(N2) Pt(daughters)>.3 Pt(daughters)>.8 10/11/14 HFT patch acceptance

Cut on daughters :||<1, TPC>10,PIXL=2, patch=triangle The cut at Pt>.8 removes more entries for Pt~1GeV/c. 10/11/14 HFT patch acceptance

Cut :||<1, TPC>10,PIXL=2, patch=joined(N3) Pt(daughters)>.3 Pt(daughters)>.8 10/11/14 HFT patch acceptance

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. 10/11/14 HFT patch acceptance

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) 10/11/14 HFT patch acceptance

Item 1. :Optimization wrt TPC sectors TPC has 12 sectors PIXEL has 10 sectors 10/11/14 HFT patch acceptance

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. 10/11/14 HFT patch acceptance

Option 1. Only pixelHits that satisfy the condition for this configuration (based on their ladder and layer number Option 2. Upgr15 modified 10/11/14 HFT patch acceptance