# Presentation: 790225

## Search for Chargino and Neutralino

- CMIO implementation

- Analysis blessed on July 12th :
- Tight Muon + Tight Muon + TightMuon/CMIO/Central Loose Electron
- For improving the acceptance:
- Tight Muon + _Tight Muon/CMIO_ +TightMuon/CMIO/Central Loose Electron

- CMIO ID variables
- Beam Constrained pt > 10 GeV
- Not fiducial to any muon chamber
- Tight track requirement: n COT Ax/St (5 hits) > 2
- Others ID as for stub muons
- Scale factor for pt > 20 GeV  = 0.9949
- (we apply the same SF for CMIO pt < 20 GeV)

- 8/01/04

## Reminder of the control regions

- If TRILEPTON,
- SIGNAL REGION

|  |  |  |  |
| --- | --- | --- | --- |
|  |  |  |  |
|  |  |  |  |

**Invariant Mass of OS muons M******

**MET**

**  ****15 ****	****	****       76****	****     106 **

**  ****10    15****	**

**nJets < 2**
**nJets > 1**

**G**
**H**

**I**
**J**

**A**
**A2**

**E**
**F**

**A**
**A2**

**G**
**H**

- 8/01/04

## Control region with 2 muons 

| CR | DiBoson | t-tbar | Fake | DY | TOT | DATA |
| --- | --- | --- | --- | --- | --- | --- |
| A | 4 | 0.4 | 6.5 | 38 | 49 | 51 |
| G | 0.4 | 0.01 | 0.5 | 924 | 925 | 933 |
| I | 0.5 | 0.0004 | 0.2 | 5468 | 5469 | 5442 |
| E | 2 | 0.1 | 30 | 78 | 110 | 108 |
| A2 | 0.06 | 1.2 | 1.1 | 1.3 | 3.7 | 3 |
| F | 0.04 | 0.3 | 0.4 | 5 | 5.8 | 7 |
| H | 0.001 | 0.04 | 0.04 | 6.7 | 6.8 | 10 |
| J | 0.0005 | 0.006 | 0.01 | 35 | 34.7 | 44 |
| Z | 2.7 | 0.5 | 31 | 6070 | 6105 | 6164 |

- 8/01/04

## Kinematic variables in region A

- All regions show good agreement
- Region J (Z, low Met, high jet multiplicity) needs understanding
- In Tight + Tight, we expect 22 and observe 20

- 8/01/04

## Control region with 3 leptons 

| CR | DiBoson | t-tbar | Fake | DY | TOT | DATA |
| --- | --- | --- | --- | --- | --- | --- |
| A | 0.07 | 0.003 | 0.05 | 0.06 | 0.18 | ??? |
| G | 0.02 | 0 | 0.097 | 1.3 | 1.4 | 2 |
| I | 0.1 | 0 | 0.45 | 1.6 | 2.1 | 2 |
| E | 0.5 | 0 | 0.1 | 0.06 | 0.66 | 1 |
| A2 | 0.0007 | 0.003 | 0.005 | 0 | 0.009 | 0 |
| F | 0.005 | 0.002 | 0.02 | 0 | 0.02 | 0 |
| H | 0.0004 | 0 | 0.01 | 0 | 0.01 | 0 |
| J | 0.001 | 0 | 0.1 | 0 | 0.1 | 1 |
| Z | 0.7 | 0.002 | 0.80 | 2 | 3.5 | 4 |

- Signal acceptance (“anadi” point) _increases from 0.37 to 0.56_
- (plug electron will provide additional 6%)
- The total background increases from 0.09 to 0.18
- S/√B increases from 1.2 to 1.3

- 8/01/04

## Validation of the 6.1 MC

- Contribute to the validation of the new 6.1  (6.1.2pre1) Drell Yan MC
- We studied the Z into mumu sample (tewk1m): comparison to 5.3 Data and 5.3 Drell Yan MC
- Found a problem in the stntuple process: beam position is not filled

- Here we apply the d0 cut which is based on the corrected beam position

- Here the d0 cut is NOT applied

- 8/01/04

## Improvement in the new MC

- Z events

- 8/01/04

## Plan

- SHORT TERM PLAN
- Public note (on going)
- Implementing Plug Electron
- Presenting to the SUSY meeting
- Processing SUSY samples produced by Liverpool in the range m0=72-190 (2 GeV step); m12=162-190 (2 GeV step) by the P5 Meeting – Sept 12th (on going)
- LONG TERM PLAN
- Conversion rejection + validation of the 6.1 data (September + October)
- Improving the acceptance (release the CMU DX cut) + Fake estimation (November + December)
- Systematics (January)
- Blessing (February)
- Moriond 2006 is at the beginning of March

- 8/01/04