PIXEL patch efficiency patch triangle patch joined 101114

PIXEL patch efficiency patch: triangle patch: joined 10/11/14 • Update of friday’s meeting. • 2 configurations of pixel sectors (3 out of 10) are studied for reconstruction of low or high Pt D 0’s. we looked at the normalized distributions (Pt, ) of the parent D 0 for different cuts on the Pt of their daughters. HFT patch acceptance 1

Simulation • Generate 100 k D 0 with : – Flat Pt in [0, 5], | |<3, |Vz|<10 cm • Use only fz file --> no reconstruction, etc … • Count : – NN : # of D 0 input – N 0 : # of D 0 after Pt cut for both daughters and| | <1 – N 1 : # of D 0 with above cuts + TPC>10, PXL=2 – N 2 : # of D 0 in triangle configuration – N 3 : # of D 0 in joined configuration • Then : – Efficiency triangle config. = N 2 / N 1 – Efficiency joined config. = N 3 / N 1 – etc … 10/11/14 HFT patch acceptance 2

Summary of plots • Slide 4 : phase space of D 0 generated with Starsim : NN • Slide 5 -7 : application of cut | |<1 and Pt of daughters : N 0 • Slide 8 -10 : application of cut | |<1 , TPC>10, PIXL=2, and Pt of daughters : N 1 • Slide 11 -12 : application of cut | |<1 , TPC>10, PIXL=2, and Pt of daughters and patch triangle : N 2 • Slide 13 -14 : application of cut | |<1 , TPC>10, PIXL=2, and Pt of daughters and patch joined : N 3 10/11/14 HFT patch acceptance 3

Phase space : input (NN) • Pt and of the D 0’s with Starsim • Uniform distributions 10/11/14 HFT patch acceptance 4

Cut on daughters : | |<1 , Pt>0. 3(N 0) 10/11/14 HFT patch acceptance 5

Cut on daughters : | |<1 , Pt>0. 8 (N 0) 10/11/14 HFT patch acceptance 6

Cut on daughters : | |<1 • distributions have the same shape. • the cut Pt>. 8 removes entries around Pt ~ 1 Ge. V 10/11/14 HFT patch acceptance 7

Cut on daughters : | |<1 , Pt>0. 3, TPC>10, PIXL=2(N 1) 10/11/14 HFT patch acceptance 8

Cut on daughters : | |<1 , Pt>0. 8, TPC>10, PIXL=2(N 1) 10/11/14 HFT patch acceptance 9

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 D 0’s for this study (same cuts are applied in BFC reconstruction), it does not change the kinematics of the D 0’s. 10/11/14 HFT patch acceptance 10

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

Cut on daughters : | |<1, TPC>10, PIXL=2, patch=triangle • The cut at Pt>. 8 removes more entries for Pt~1 Ge. V/c. 10/11/14 HFT patch acceptance 12

Cut : | |<1, TPC>10, PIXL=2, patch=joined(N 3) Pt(daughters)>. 3 Pt(daughters)>. 8 10/11/14 HFT patch acceptance 13

Cut : | |<1, TPC>10, PIXL=2, patch=joined • The D 0’s Pt distribution is not sensible to the cut on the daughters Pt with this PIXL configuration. 10/11/14 HFT patch acceptance 14

• Next : 1. What is the best configuration ? optimization 2. Run BFC chain (reconstruction) over existing production with patches. 3. Do the simulation with run 13 : agml 4. Try to optimize the tracker because we do expect bad performances with TPC+PIXL (search. Window parameters, to check with Sti. Pulls) 10/11/14 HFT patch acceptance 15

Item 1. : Optimization wrt TPC sectors • TPC has 12 sectors • PIXEL has 10 sectors 10/11/14 HFT patch acceptance 16

Item 2. : reconstruction with BFC • Option 1 : – mask the pixel Hits in the Fast. Sim. Maker ( 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 – Cons : • Require a bit more work but precise material. 10/11/14 HFT patch acceptance 17

Option 1. Only pixel. Hits that satisfy the condition for this configuration (based on their ladder and layer number Option 2. Upgr 15 modified 10/11/14 HFT patch acceptance 18