Study of Reduced
L1 Acceptance
D.Acosta
University of Florida
ME 1/1 Descope
Investigate relative acceptance loss at Level-1 for |η
η|<2.1
vs. |η
η|<2.4 using MuonAnalysis ntuples in $ANA_MUON
Apply low luminosity thresholds
P (1mu) > 20 GeV
P (2mu) > 4 GeV
T
T
Earlier study: CMS Note 1998/020
Pretty good agreement with this study
Thresholds were (20,4) GeV for high lumi, (7, 2+) GeV low lumi
PRS/Mu Meeting, October 23, 2001
2
Darin Acosta
H → 4µ L1 Efficiency
M = 150 GeV
3000 events
Efficiency
L1 Trigger Efficiency for H->4mu
1.1
1
|η
η| < 2.1
0.1% loss
0.9
0.8
Single or Double Trigger
Single Trigger Pt > 20
0.7
Double Trigger Pt > 4
0.6
0.5
1
1.2
1.4
PRS/Mu Meeting, October 23, 2001
1.6
1.8
3
2
2.2
2.4
Eta coverage
Darin Acosta
H → 4µ Acceptance (Generated)
M = 150 GeV
3000 events
Acceptance
Relative Acceptance for H->4mu
1
0.8
0.6
1 muon
2 muons
3 muons
4 muons
0.4
0.2
0
1
1.2
1.4
PRS/Mu Meeting, October 23, 2001
1.6
1.8
4
2
2.2
2.4
Eta coverage
Darin Acosta
|η
η| < 2.1:
18% loss
incurred if
no offline
recon of
high η
muons
H → 2µ Relative L1 Efficiency
M = 140 GeV
1545 events
Efficiency
L1 Trigger Efficiency for H->2mu
1
|η
η| < 2.1
3% loss
0.8
0.6
Single or Double Trigger
0.4
Single Trigger Pt > 20
Double Trigger Pt > 4
0.2
0
1
1.2
PRS/Mu Meeting, October 23, 2001
1.4
1.6
1.8
5
2
2.2
2.4
Eta coverage
Darin Acosta
H → 2µ Acceptance (Generated)
M = 140 GeV
1545 events
Acceptance
Relative Acceptance for H->2mu
1
0.8
0.6
1 muon
0.4
2 muons
0.2
0
1
1.2
1.4
PRS/Mu Meeting, October 23, 2001
1.6
1.8
6
2
2.2
2.4
Eta coverage
Darin Acosta
|η
η| < 2.1:
11% loss
incurred if
no offline
recon of
high η
muons
tt → 1µ Relative L1 Efficiency
6500 events
Efficiency
Relative L1 Trigger Efficiency for top->1mu
1
0.8
|η
η| < 2.1
5% loss
0.6
0.4
0.2
0
1
1.2
1.4
PRS/Mu Meeting, October 23, 2001
1.6
1.8
7
2
2.2
2.4
Eta coverage
Darin Acosta
W → 1µ Relative L1 Efficiency
Efficiency
Relative L1 Trigger Efficiency for W->1mu
1
0.8
|η
η| < 2.1
13% loss
0.6
0.4
0.2
0
1
1.2
PRS/Mu Meeting, October 23, 2001
1.4
1.6
1.8
8
2
2.2
2.4
Eta coverage
Darin Acosta
γ*/Z → 1µ Relative L1 Efficiency
Efficiency
Relative L1 Trigger Efficiency for Gamma/Z->1mu
1
0.8
|η
η| < 2.1
14% loss
0.6
0.4
0.2
0
1
1.2
PRS/Mu Meeting, October 23, 2001
1.4
1.6
1.8
9
2
2.2
2.4
Eta coverage
Darin Acosta