# Presentation: 670176

## Signal and Background Acceptance 
Low – High pT comparison 
L3 Triggering Efficiency
Low pT DIMUON trigger 

MC STATUS
New Background MonteCarlo:
	5.3.1    WW, WZ, ZZ and ttbar (Liverpool)
	4.11.2  bbbar (QCD)
		     Z, Z, W W 	
New Signal Montecarlo:
	m1/2 = 180 GeV, m0 = 100 GeV, sgn() =1, A0 =0 (Liverpool)

- Low – High pT comparison
- L3 Triggering Efficiency
- Low pT DIMUON trigger
**MC STATUS**
- New Background MonteCarlo:
- 	5.3.1    WW, WZ, ZZ and ttbar (Liverpool)
- 	4.11.2  bbbar (QCD)
- 		     Z, Z, W W
- New Signal Montecarlo:
- 	m1/2 = 180 GeV, m0 = 100 GeV, sgn() =1, A0 =0 (Liverpool)

**Search for Chargino and Neutralino**

## Run I cuts & D0 Run II

**Run I cuts**
- (not optimized for Run II scenario)
- 3 leptons with pT > 4 & ||<1.0
-  R > 0.4
-   < 170
-  Z removal
-   removal
-  J/ removal
-  MET>15 GeV

**D0 Run II p****T**** cuts**
- ee + track
- 12,8 GeV
- e
- 12, 8 GeV
- LS 
- 11,5 GeV

## Comparison low-high pT approachSignal

|  | SUSY 
tan=5 | SUSY 
tan=5 | SUSY 
tan=5 | SUSY 
tan=3 | SUSY 
tan=3 | SUSY 
tan=3 |
| --- | --- | --- | --- | --- | --- | --- |
| R > 0.4 | 94% | 87% | 82% | 95% | 87% | 82% |
|  < 170 | 84% | 84% | 84% | 86% | 86% | 86 % |
| Z0 removal | 86% | 86% | 85% | 86% | 85% | 84 % |
|  removal | 93% | 93% | 94% | 94% | 94% | 95 % |
| J/ removal | 100% | 100% | 100% | 100% | 100% | 100% |
| Missing ET > 15 GeV | 61% | 61% | 60% | 63% | 63% | 62 % |
| Total efficiency | 0.85% | 0.79% | 0.73% | 1.3% | 1.2% | 1.1 % |

- m1/2 = 180 GeV, m0 = 100 GeV, sgn() =1, A0 =0

| pT(1st,2nd,3rd)GeV | 4,4,4 | 10,5,5 | 20,5,5 | 4,4,4 | 10,5,5 | 20,5,5 |
| --- | --- | --- | --- | --- | --- | --- |

## Comparison low-high pT approachBackground

|  | WZ | WZ | WZ | ZZ | ZZ | ZZ |
| --- | --- | --- | --- | --- | --- | --- |
| R > 0.4 | 98% | 94 % | 93 % | 95% | 83% | 78% |
|  < 170 | 83% | 82 % | 83 % | 83% | 83% | 83% |
| Z0 removal | 12% | 12 % | 11 % | 24% | 18% | 15% |
|  removal | 94% | 96 % | 100 % | 81% | 90% | 94% |
| J/ removal | 100% | 100 % | 100 % | 96% | 95% | 96% |
| Missing ET > 15 GeV | 80% | 82 % | 81 % | 35% | 36% | 35% |
| Total efficiency | 0.024 % | 0.023 % | 0.021 % | 0.009% | 0.006% | 0.005% |

**Comparison low-high p****T**** approach****Background**

| pT(1st,2nd,3rd)GeV | 4,4,4 | 10,5,5 | 20,5,5 | 4,4,4 | 10,5,5 | 20,5,5 |
| --- | --- | --- | --- | --- | --- | --- |

## Comparison low-high pT approachBackground

|  | WW | WW | WW |
| --- | --- | --- | --- |
| R > 0.4 | 75 | 50 | 50 |
|  < 170 | 100 | 100 | 100 |
| Z0 removal | 100 | 100 | 100 |
|  removal | 100 | 100 | 100 |
| J/ removal | 100 | 100 | 100 |
| Missing ET > 15 GeV | 100 | 100 | 100 |
| Total efficiency | 0.017% | 0.0005% | 0.0005% |

| pT(1st,2nd,3rd) | 4,4,4 | 10,5,5 | 20,5,5 |
| --- | --- | --- | --- |

**Comparison low-high p****T**** approach****Background**

**VERY** low stat ( ~ 4 events left)
- Same as for b-bbar sample

## DIMUON Trigger Path in PHYSICS_1_05_v-8

- Dimuon_cmu4_cmx4
- Dimuon_cmu4_cmx4_L2_trk8_L1_cmup6_pt4
- Dimuon_cmucmu4
- Dimuon_cmucmu4_L2_trk8_L1_cmup6_pt4
- Dimuon_cmup4_cm4
- Dimuon_cmupcmup4

## Sample

- Muon Calib Sample (stream B): bmcl0d
- Path: MUON_CMUP8_v-9
- L1:L1_CMUP6_PT4
- CMU_stub_PT = 6 Gev
- CMU_XFT_PT = 4.09 GeV
-  require CMP
- L2:L2_CMUP6_PT_8
- XFT layers = 4
-  XFT PT = 8 GeV
- L3:L3_MUON_CMUP8
-  cmpDx = 20.0 cm
-  cmuDx = 15.0 cm
-  minPT = 8.0GeV

## CMUPCMUP4 Trigger 

- Path: DIMUON_CMUPCMUP4_v-1
- L1:L1_TWO_CMU1.5_PT1.5
- L2:L2_AUTO_L1_TWO_CMU1.5_PT1.5
- L3:L3_DIMUON_CMUPCMUP4
-  cmpDx = 20.0 cm
-  cmuDx = 15.0 cm
-  minPT = 4.0 GeV
-  selectCMUP = true
-  nMuons = 2

## Event Efficiency

-  **Event based efficiency**
-  If event has L1_TWO_CMU1.5_PT1.5 fired
- If event has >1 candidate muons = candidate evt
- If event has L3_DIMUON_CMUPCMUP4 fired = triggered evt
**Efficiency = triggered evts / candidate evts**
**ε**** ****= 95%****                           **

- Candidate muon = identified + satisfying L3 requirements
**(224642 total nev)**

## Muon based efficiency

- Unbiased muon = muon which did NOT trigger L3 CMUP8
**(224642 total nev)**

-  **Muon based efficiency**
-  Subsample of unbiased muons
- If muon is identified and satisfies L3 requirements (=candidate muon)
- If a muon triggers L3 (=triggering muon)
**Efficiency = triggered muons / candidate muons**
**ε**** =** **90%**

## Matching variable

- LOOSE Cut at 0.2 cm

## Eff. vs pT  Event Based

**(508979 total nev)**

## Next

- Validation of the new samples (low priority)
- Cut optimization for the cases (10,5,5) and (20,5,5) muon pT (low priority)
- L3 Trigger Efficiency Measurement for the other triggers
- Start looking at L1 trigger efficiency (dead line, Jun 30th 2004 as required my the multilepton group)

## Eff. vs pT  Muon Based

**(508979 total nev)**