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Software Update Takashi HACHIYA RIKEN 2012/2/10RIKEN VTX software meeting1.

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Presentation on theme: "Software Update Takashi HACHIYA RIKEN 2012/2/10RIKEN VTX software meeting1."— Presentation transcript:

1 Software Update Takashi HACHIYA RIKEN 2012/2/10RIKEN VTX software meeting1

2 Remaining Issues IssueStatusExpected time to finish Memory leaksOne big leak is fixed at last week. But another big leaks still remain. 1week 2days Improve Chi2 calculation Using real data, currently working on this issue.2 or 3 days 2days Improve DCA calculation Second (or more) hits are used for the DCA calculation. Not start yet 2 or 3 days Parameter tuningUsed for speed-up. Not start yet2 or 3 days Speed upApply tigher cut (now too much wider).1week Efficiency Study using simulation Correlated with parameter tuning.1week Event Display for Run 12 Prepare for run 12Ready (1day) 2012/2/10RIKEN VTX software meeting2 Status : 1 st version code is in the CVS. basic functions work well. CNTtrack – VTX hit association DCA calculation There are still remaining issues listed below.

3 Memory Leak Issue Memory leak in SvxCentralTrackReco – 1 st Leak is fixed (last week) – 2 nd leak is fixed (this week) – 3 rd leak is about to be fixed. From stl vector in DST node. TClonesArray can not handle vector completely. I will use a fixed length array instead of vector. There are still a lot of leaks in the svxDetectorGeo, SvxReco, SvxStripixel, SvxStandaloneReco, 2012/2/10RIKEN VTX software meeting3

4 2012/2/10RIKEN VTX software meeting4 Data Simulation pT(GeV/c) (um) DCA resolution between data and simulation is compared. – DCA resolution = gaussian sigma Simulation : Alan’s Talk at Review 2009. (values are taken by eye from his slide) pT dependence looks similar, but the resolution in the data is slightly worse. pT dependence of DCA resolution (homework)

5 Chi2 distribution Chi2(dphi, dz) in data and simulation are compared: – Data : Run 349679 10k events – Simulation: Single pi+/pi-, Sigma_Vtx(x,y) = 1mm, z=5cm Sigma in chi2 calculation which obtained by data is used for both data and simulation. Chi2 (dphi) Looks similar, but chi2(dz) in simulation is smaller than that in data. This imply that the alignment in dz is needed. 2012/2/10RIKEN VTX software meeting5 chi2(dphi) Data Sim Data Sim

6 Check the correlation of dphi slope sublayer by sublayer 2012/2/10RIKEN VTX software meeting6 B2-B3 B1-B3 B0-B3 B1-B2 B0-B2 B0-B1 Nodata Correlation btw layers  btw sublayers – B3, B2… 6 types  B3(7),B3(6), … 22 types

7 pT dependence of sigma 2012/2/10RIKEN VTX software meeting7 0.2-0.30.3-0.40.4-0.50.5-0.6 0.6-0.80.8-1.01.0-1.51.5-2.0 2.0-3.03.0-4.0 (cm) Sigma vs pT pT(GeV/c) Sigma(cm) Residual distritubion is Fit by gaussian Sigma vs pT is fit by – f(p) = a + b/p^c Currently dphi is considered. – for a while, dphi is well aligned.

8 Chi 2 distribution is updated Chi2 (dphi) is improved. Chi2(dz) is not studied yet in detail. 2012/2/10RIKEN VTX software meeting8 Old calculation Updated calculation Normalized by Ncount within 0-30

9 Selection: – |dphi3| 1GeV/c The tail reduces significantly with tighter chi2(dphi) cut 2012/2/10RIKEN VTX software meeting9 Chi2(dphi)<100 Chi2(dphi)<10 Chi2(dphi)<5 DCA distribution with chi2(dphi) cut

10 Back up 2012/2/10RIKEN VTX software meeting10

11 dphi_n vs dphi_m 2012/2/10RIKEN VTX software meeting11

12 Sigma vs pT for each combination 2012/2/10RIKEN VTX software meeting12

13 B2(4)-B3(7) 2012/2/10RIKEN VTX software meeting13

14 B2(3)-B3(7) 2012/2/10RIKEN VTX software meeting14

15 B2(2)-B3(7) 2012/2/10RIKEN VTX software meeting15

16 B2(4)-B3(6) 2012/2/10RIKEN VTX software meeting16

17 B2(3)-B3(6) 2012/2/10RIKEN VTX software meeting17

18 B2(2)-B3(6) 2012/2/10RIKEN VTX software meeting18

19 B2(4)-B3(5) 2012/2/10RIKEN VTX software meeting19

20 B2(3)-B3(5) 2012/2/10RIKEN VTX software meeting20

21 B2(2)-B3(5) 2012/2/10RIKEN VTX software meeting21

22 B1-B3(7) 2012/2/10RIKEN VTX software meeting22

23 B1-B3(6) 2012/2/10RIKEN VTX software meeting23

24 B1-B3(5) 2012/2/10RIKEN VTX software meeting24

25 B0-B3(7) 2012/2/10RIKEN VTX software meeting25

26 B0-B3(6) 2012/2/10RIKEN VTX software meeting26

27 B0-B3(5) 2012/2/10RIKEN VTX software meeting27

28 B1-B2(4) 2012/2/10RIKEN VTX software meeting28

29 B1-B2(3) 2012/2/10RIKEN VTX software meeting29

30 B1-B2(2) 2012/2/10RIKEN VTX software meeting30

31 B0-B2(4) 2012/2/10RIKEN VTX software meeting31

32 B0-B2(3) 2012/2/10RIKEN VTX software meeting32

33 B0-B2(2) 2012/2/10RIKEN VTX software meeting33

34 B0-B1 2012/2/10RIKEN VTX software meeting34

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