Z mm Analysis Update
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Z Analysis Update T. Dai, E. Diehl, D. Levin, X. Li, J. Liu, J. Purdham, R. Thun, H. Wang, Y. Wu, H. Yang, Z. Zhao, B. Zhou, J. Zhu UM ATLAS Group 10/07/2010
description
Z mm Analysis Update. T. Dai, E. Diehl, D. Levin, X. Li, J. Liu, J. Purdham, R. Thun, H. Wang, Y. Wu, H. Yang, Z. Zhao, B. Zhou, J. Zhu UM ATLAS Group 10/07/2010. Integrated Luminosity calculation (Z mm ) ( m b -1 ) * :. A-G4: ~ 6.86 pb-1 + G5(2 runs) => 7.3 pb -1 - PowerPoint PPT Presentation
Transcript of Z mm Analysis Update
ZAnalysis Update
T. Dai, E. Diehl, D. Levin, X. Li, J. Liu, J. Purdham, R. Thun, H. Wang, Y. Wu, H. Yang, Z. Zhao, B. Zhou, J. Zhu
UM ATLAS Group10/07/2010
Integrated Luminosity calculation (Z) (b-1) *:
Run Period L1_MU6 L1_MU10 EF_mu10 EF_mu10_MSonly
EF_mu10_MG
EF_mu15
ABCD (152166-159224) 3.31E+05 3.31E+05 3.31E+05 3.31E+05 3.31E+05 3.30E+05
E(160387-161948) 1.08E+06 1.08E+06 1.08E+06 1.08E+06 1.08E+06 1.08E+06
F(162347-162882) 1.96E+06 1.96E+06 1.96E+06 1.71E+06 1.96E+06 1.96E+06
G1(165591-165632) 7.80E+05 7.80E+05 7.80E+05 2.35E+05 7.80E+05 7.80E+05
G2(165703-165732) 1.19E+06 1.19E+06 1.19E+06 2.01E+04 1.19E+06 1.19E+06
G3(165767-165815) 1.26E+06 1.26E+06 1.26E+06 1.58E+04 1.26E+06 1.26E+06
G4(165817-165818) 2.68E+05 2.68E+05 2.68E+05 1.72E+03 2.68E+05 2.68E+05
Total (A-G4) 6.86E+06 6.86E+06 6.86E+06 3.40E+06 6.86E+06 6.86E+06165821,165956 (Part of G5)* 4.10E+05
A-G4: ~ 6.86 pb-1 + G5(2 runs) => 7.3 pb-1
- mu10_MSonly trigger largely pre-scaled, can not be used for analysis- *A-G4: Z-> GRL from Alberto - *G5 (2 runs): Stable Beam GRL
MC Samples Z106047_PythiaZmumu_no_filter_r1388_r1389 (Pileup MC)
ttbar 105200_T1_McAtNlo_Jimmy
Z 106052_PythiaZtautau_r1394_r1389 (Pileup MC)
W/j 107690_AlpgenJimmyWmunuNp0_pt20 107691_AlpgenJimmyWmunuNp1_pt20 107692_AlpgenJimmyWmunuNp2_pt20 107693_AlpgenJimmyWmunuNp3_pt20 107694_AlpgenJimmyWmunuNp4_pt20 107695_AlpgenJimmyWmunuNp5_pt20 107700_AlpgenJimmyWtaunuNp0_pt20 107701_AlpgenJimmyWtaunuNp1_pt20 107702_AlpgenJimmyWtaunuNp2_pt20 107703_AlpgenJimmyWtaunuNp3_pt20 107704_AlpgenJimmyWtaunuNp4_pt20 107705_AlpgenJimmyWtaunuNp5_pt20
Drell-Yan 108319_PythiaDrellYan_mumu, 107055_PythiaDrellYanLowMtautau_M10
St 108340_st_tchan_enu_McAtNlo_Jimmy 108341_st_tchan_munu_McAtNlo_Jimmy 108342_st_tchan_taunu_McAtNlo_Jimmy 108343_st_schan_enu_McAtNlo_Jimmy 108344_st_schan_munu_McAtNlo_Jimmy 108345_st_schan_taunu_McAtNlo_Jimmy 108346_st_Wt_McAtNlo_Jimmy
Di-jet 105802_JF17_pythia_jet_filter _r1388_r1389 (Pileup MC)
Zselection Cuts Start from WWD3PDs GRL PV Cut ( nTracks >=3 && |pv_z|<150 mm) Good Muon Selection
Combined Muon, pt>15 GeV, |eta|<2.5 Pt(MS) > 10 GeV, (Pt(MS) - Pt(ID)) <15GeV |z0 ex.PV | < 10 mm Isolation cut: PtCone40 / Pt() < 0.2
2 Opposite Charge Good Muon 2 Good Muon both have pt > 20 GeV 2 Good Muon both have ||<2.4 2 Good Muon both have Ptcone40/pt < 0.2 Z Mass Cut: 66 GeV<|M()|<116 GeV Trigger Requirement
Should put trigger cut at the end For Data, May use “L1_MU6” for Period A-D; “EF_mu10_MG” for Period E-F; “EF_mu10” for Period G MC, use L1_MU6 (HLT Trigger may not well simulated)
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ZCut Flow from Data (7.3 pb-1) (Staco)
Cuts\ Data PeriodsA-D
(0.33pb-1)E-F
(3.14pb-1)G1-G4
(3.40 pb-1)G5(2 runs)(0.41pb-1)
D3PDFilter 2.8719E+06 9.1112E+06 4.8307E+06 4.116E+05
GRL + BCID 2.4834E+06 8.9469E+06 4.7972E+06 4.116E+05
JetCleaning 2.4797E+06 8.9426E+06 4.7961E+06 4.115E+05
Primary Vertex Cut 1.5342E+06 8.0483E+06 4.4868E+06 3.960E+05
L1_MU0 || L1_MU6 2.2200E+02 1.9840E+03 2.3770E+03 2.450E+02
>= 2 good muons 2.2200E+02 1.9840E+03 2.3770E+03 2.450E+02
2 muons, opposite charge 2.1000E+02 1.8370E+03 2.1920E+03 2.360E+02
2 muons, |h|<2.4 2.0400E+02 1.7720E+03 2.1030E+03 2.310E+02
2 muons, PT>20GeV 1.4400E+02 1.2390E+03 1.4490E+03 1.590E+02
2 muons,Ptcone40/PT<0.2 1.2000E+02 1.0600E+03 1.2560E+03 1.360E+02
66 GeV <|Mmm-MZ|<116 GeV 1.1200E+02 9.9000E+02 1.1730E+03 1.270E+02
If L1_MU6 1.0800E+02 9.8200E+02 1.1660E+03 1.270E+02
If EF_mu10 8.7000E+01 9.4100E+02 1.1650E+03 1.260E+02
If EF_mu10_MG 9.7000E+01 9.8100E+02 1.1660E+03 1.000E+00
If EF_mu10_MSonly 9.7000E+01 9.0600E+02 9.2000E+01 1.270E+02
Red ColorUse suggested triggers
High Efficiency
Total 2380 Zs
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ZCut Flow from Data (7.3 pb-1) (Muid)
Cuts\ Data PeriodsA-D
(0.33pb-1)E-F
(3.14pb-1)G1-G4
(3.40 pb-1)G5(2 runs)(0.41pb-1)
D3PDFilter 2.87E+06 9.1112E+06 4.8307E+06 4.1155E+05
GRL + BCID 2.48E+06 8.9469E+06 4.7972E+06 4.1155E+05
JetCleaning 2.48E+06 8.9426E+06 4.7961E+06 4.1149E+05
Primary Vertex Cut 1.53E+06 8.0483E+06 4.4868E+06 3.9597E+05
L1_MU0 || L1_MU6 2.16E+02 2.0280E+03 2.4160E+03 2.4200E+02
>= 2 good muons 2.16E+02 2.0280E+03 2.4160E+03 2.4200E+02
2 muons, opposite charge 2.03E+02 1.8740E+03 2.2280E+03 2.3300E+02
2 muons, |h|<2.4 1.98E+02 1.8090E+03 2.1440E+03 2.2800E+02
2 muons, PT>20GeV 1.38E+02 1.2760E+03 1.4920E+03 1.6000E+02
2 muons,Ptcone40/PT<0.2 1.16E+02 1.1070E+03 1.3040E+03 1.3700E+02
66 GeV <|Mmm-MZ|<116 GeV 1.08E+02 1.0340E+03 1.2280E+03 1.2700E+02
If L1_MU6 1.05E+02 1.0230E+03 1.2230E+03 1.2700E+02
If EF_mu10 8.30E+01 9.8000E+02 1.2220E+03 1.2600E+02
If EF_mu10_MG 9.00E+01 1.0230E+03 1.2200E+03 1.2700E+02
If EF_mu10_MSonly 9.00E+01 9.4600E+02 1.0600E+02 1.0000E+00
Red ColorUse suggested triggers
High Efficiency
Total 2476 Zs
Data Candidates/ MC Expectation (7.3 pb-1)
Process Staco MuidZ 2665 2742
Ztt 2.6 2.9
W+jet 0.2 0.2
ttbar 3.3 3.3
Drell-yan 0 0
Single top 0.3 0.4
Di-jet 0 0
MC Total 2671 2749
Data 2380 2476
* NNLO Cross-section for Z: 0.99 nb Trigger Eff correction not applied in this table
Z Mass Resolution (After Z mass Cut) (Staco)
Period E~ 3.7GeV
Period F~ 3.8 GeV
Period G1~ 2.5GeV
Seems like a big improvement
Ok, then next page
Z Mass Resolution (After Z mass Cut) (Staco)
Period G2~ 3.3GeV
Period G3~ 3.4 GeV
Period G4~ 2.5GeV
Z Mass ResolutionGoes back to
~3.5 GeV LevelAfter G2
Plots: M() at Pre-selection (Staco)
Same Sign??
Opposite Charge
MC Deficit in Low M region, need to investigate
Plots: M() of Final Z Candidates (Staco)
Plots: M() of Final Z Candidates (Staco)
Pt()
dR)
Njet(Pt>20GeV)
MET
Summary
Update Z Selection with 7.3 pb-1, observed 2400~2500 Z Candidates, still have ~10% deficit compared to MC prediction
Suggest to move “Trigger Cuts” to the last, which may make analysis more easier
After Collect infomation from Trigger Config, Trigger Group and Directly compare Different interested triggers on Z Candidates, We suggest following trigger to be used: L1_MU6(Period A-D), EF_mu10_MG(E-F), EF_mu10(G) More studies still to be done on these About Z mass resolution, we really see improvement in Period G2 compared to previous data taking period; However, the resolution goes back to ~3.5 GeV level after Period G2
