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Comparison among 4 geometries May-28 2008 ACFA-Sim-J meeting S. Uozumi (Kobe) P T, d 0 resolution with single muon events Flavour Tagging Performance with.

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Presentation on theme: "Comparison among 4 geometries May-28 2008 ACFA-Sim-J meeting S. Uozumi (Kobe) P T, d 0 resolution with single muon events Flavour Tagging Performance with."— Presentation transcript:

1 Comparison among 4 geometries May-28 2008 ACFA-Sim-J meeting S. Uozumi (Kobe) P T, d 0 resolution with single muon events Flavour Tagging Performance with Z-pole events

2 P T Resolution 1 GeV2 GeV5 GeV 10 GeV20 GeV50 GeV 100 GeV200 GeV500 GeV 1/ P T – 1/P T nom P T resolution quite consistent among 4 geometries.

3 d 0 Resolution 1 GeV2 GeV5 GeV 10 GeV20 GeV50 GeV 100 GeV200 GeV500 GeV d 0 (  m) d 0 resolution also quite consistent among 4 geometries.

4 b/c-tagging with cheated tracks Just a slight difference among 4 geometries on c-tagging. Reason not investigated yet.

5 b/c-tagging with full tracking Just a slight difference among 4 geometries. C-tagging worse than the result with cheated tracks.

6 Cheated v.s. Full tracking (GLDDEC07) The problem likely comes from light-quark jet separation … Cheated tracks b-jets c-jets light-quark jets b-jets c-jets light-quark jets Full tracking

7 Cheated v.s. Full tracking (GLDDEC07) light-quark jet events D0Significance1D0Significance2DecayLength (SeedtoIP) DecayLength Significance JointProbRPhi JointProbZ Momentum1Momentum2 NumTracks InVertices NumVertices PTCorrectedMassRawMomentum SecVertexProbZ0Significance1 Z0Significance2 D0Significance1 (zoom) D0Significance2 (zoom) Z0Significance1 (zoom) Z0Significance2 (zoom)

8 Something wrong with  d0 and  z0 ? Case for two tracks : P i … d 0 / z 0 significance of i-th track Since d0 resolution is already confirmed to be reasonable, possible cause of the problem is under-estimation of  d0 and  z0. It is actually found that with Z -> qq events pull-distribution of d0 has larger RMS than unity (~1.8). What makes the estimation of d  /z 0 errors wrong?

9 If nladders and VTX layer thickness are changed … c-tagging performance goes to be better…

10 Summary Momentum resolution and d0 resolution are checked (with single muon at cos  =0.02). Performance is OK and consistent among 4 geometries. Flavour tagging performance with full tracking is worse than result with cheated tracks. Due to wrong estimation of sd0 and sz0. Some hints found, further investigation is underway. However current FT performance with full tracking is OK to proceed to the physics study.

11 All the distributions as backup

12 1/P T with GLDDEC07 1 GeV2 GeV5 GeV 10 GeV20 GeV50 GeV 100 GeV200 GeV500 GeV 1/ P T – 1/P T nom

13 1/P T with GLDAPR08 1 GeV2 GeV5 GeV 10 GeV20 GeV50 GeV 100 GeV200 GeV500 GeV 1/ P T – 1/P T nom

14 1/P T with GLDPRIMv4 1 GeV2 GeV5 GeV 10 GeV20 GeV50 GeV 100 GeV200 GeV500 GeV 1/ P T – 1/P T nom

15 1/P T with J4LDCv4 1 GeV2 GeV5 GeV 10 GeV20 GeV50 GeV 100 GeV200 GeV500 GeV 1/ P T – 1/P T nom

16 d 0 with GLDDEC07 1 GeV2 GeV5 GeV 10 GeV20 GeV50 GeV 100 GeV200 GeV500 GeV 1/ P T – 1/P T nom

17 d 0 with GLDAPR08 1 GeV2 GeV5 GeV 10 GeV20 GeV50 GeV 100 GeV200 GeV500 GeV 1/ P T – 1/P T nom

18 d 0 with GLDPRIMv4 1 GeV2 GeV5 GeV 10 GeV20 GeV50 GeV 100 GeV200 GeV500 GeV 1/ P T – 1/P T nom

19 d 0 with J4LDCv4 1 GeV2 GeV5 GeV 10 GeV20 GeV50 GeV 100 GeV200 GeV500 GeV 1/ P T – 1/P T nom

20 Cheated v.s. Full tracking (GLDDEC07) b-jet events D0Significance1D0Significance2DecayLength (SeedtoIP) DecayLength Significance JointProbRPhi JointProbZ Momentum1Momentum2 NumTracks InVertices NumVertices PTCorrectedMassRawMomentum SecVertexProbZ0Significance1 Z0Significance2 D0Significance1 (zoom) D0Significance2 (zoom) Z0Significance1 (zoom) Z0Significance2 (zoom)

21 Cheated v.s. Full tracking (GLDDEC07) c-jet events D0Significance1D0Significance2DecayLength (SeedtoIP) DecayLength Significance JointProbRPhi JointProbZ Momentum1Momentum2 NumTracks InVertices NumVertices PTCorrectedMassRawMomentum SecVertexProbZ0Significance1 Z0Significance2 D0Significance1 (zoom) D0Significance2 (zoom) Z0Significance1 (zoom) Z0Significance2 (zoom)

22 Cheated v.s. Full tracking (GLDDEC07) light-quark jet events D0Significance1D0Significance2DecayLength (SeedtoIP) DecayLength Significance JointProbRPhi JointProbZ Momentum1Momentum2 NumTracks InVertices NumVertices PTCorrectedMassRawMomentum SecVertexProbZ0Significance1 Z0Significance2 D0Significance1 (zoom) D0Significance2 (zoom) Z0Significance1 (zoom) Z0Significance2 (zoom)

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