# Presentation: 683184

## Trilepton searches in p11.12 data

- Search for eee, eeμ, eμμ, μμμ, and eventually more leptons.

- Anne-Marie Magnan---ISN Grenoble

- November 21, 2002---NP meeting

## Characteristics of the input dataset

- Dataset _**p11.12.01**_ streamed by TOP Group:
- 	 http://www-clued0.fnal.gov/~golling/top_dqm/processing_status.html
- 		- DiEM selection : 2 EM particles with pt > 12 GeV and
- 			|id| = 10 or 11.
- 		- DiMUON selection : 2 μ with pt > 2 GeV and
- 			whits_a  2		whits_bc  2 		shits_a  1 		shits_bc  1.
- 		- EM + μ selection : one EM particle with pt > 10 GeV and
- 			one μ with pt > 2 GeV.
- Runs 155554 to 165775, from 1st June 2002 to 8th Oct 2002.
- Bad muons runs removed, bad SMT and CFT also.
- Luminosity : 3.57 pb-1 for EM_MX.

- Anne-Marie Magnan---ISN Grenoble

- November 21, 2002---NP meeting

## Further selection

- Use of MuoCandidate and EmCandidate classes
- 			  _**Certified Objects**_.
- Analyze performed with certified cuts :
- _for __**muons**_: in GetMuoCandidate Class : MuoCandidate::All,
- 						      doCalTracking = false,
- 						      CutCosmics = true,
- 			  selection of medium quality μ,
- 			  and |timeBC(μ) – timeA(μ)| < 10.
- _for __**EM objects**_: 	EM fraction > 0.9,
- 				Isolation < 0.15,
- 				HMatrix < 100,
- 				removed EM objects in phi cracks.

- Anne-Marie Magnan---ISN Grenoble

- November 21, 2002---NP meeting

## Some more cuts

_**At least 3 leptons:**_

|  | e1e2e3 |  | e1e2μ1 |  |  | e1μ1μ2 |  | μ1μ2μ3 |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
|  | eee | eeee | eeμ | eeμe | eeμμ | eμμ | eμμμ | μμμ | μμμμ |
| Nb events | 775 | 56 | 1073 | 72 | 10 | 1788 | 2 | 50 | 1 |

| 11 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |

| Cut
in
Pt | Pt(e1) > 30 GeV
Pt(e2) > 15 GeV
Pt(e3) > 15 GeV
Pt(e4) > 5 GeV | Pt(e1) > 30 GeV
Pt(e2) > 15 GeV
Pt(μ1) > 15 GeV | Pt(e1) > 15 GeV
Pt(μ1) > 15 GeV
Pt(μ2) > 15 GeV
 | Pt(μ1) > 10 GeV
Pt(μ2) > 10 GeV
Pt(μ3) > 5 GeV
 |
| --- | --- | --- | --- | --- |

- 

- Anne-Marie Magnan---ISN Grenoble

- November 21, 2002---NP meeting

## 
1st electron: 0 are matched,
2nd electron: 3 are matched with  -  sign,
3rd electron: 1 is matched with  +  sign.

	 new cuts : distance between electrons > 0.7
	     and at least one track match.
		 Remains 2 events with 3 electrons.

- 1st electron: **0** are matched,
- 2nd electron: **3** are matched with  **-**  sign,
- 3rd electron: **1**** **is matched with  **+**  sign.
- 	 new cuts : distance between electrons > 0.7
- 	     and at least one track match.
- 		 Remains 2 events with 3 electrons.

- Characteristics of eee sample

- Anne-Marie Magnan---ISN Grenoble

- November 21, 2002---NP meeting

## Remaining events

|  | eee |  |  |  |  |  | eμμ |  |  | μμμ |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
|  | event 1 |  |  | event 2 |  |  |  |  |  |  |  |  |
|  | e1 | e2 | e3 | e1 | e2 | e3 | e1 | μ1 | μ2 | μ1 | μ2 | μ3 |
| Pt(GeV) | 34 | 18 | 16 | 38 | 19 | 20 | 21 | 19 | 43 | 9 | 13 | 15 |
| eta-phi | ec | cc | ic | cc | cc | ic | ec | C | F | F | F | C |
| Jet iso | isolated |  |  | isolated |  |  | isolated |  |  | isolated |  |  |
| Track | no | -1 | no | no | -1 | +1 | no | L- | L+ | L- | L- | LC+ |
| Iso | isolated |  |  | isolated |  |  | e1-μ2  0.7 |  |  | μ2-μ3  0.45 |  |  |
| MET | 4.6 GeV |  |  | 16 GeV |  |  | 35 GeV |  |  | 19.15 GeV |  |  |
| Nb jets | 0 |  |  | 1 (pt=37 GeV) |  |  | 2 (29, 10 GeV) |  |  | 0 |  |  |
| dimass
GeV.c-2 | 88.5, 52,31 |  |  | 53,38,64 |  |  | Mμ+μ-= 77 |  |  | 16,20,5.6 |  |  |
| trimass | 107 GeV.c-2 |  |  | 91 GeV.c-2 |  |  | 107 GeV.c-2 |  |  | 26.4 GeV.c-2 |  |  |
| Run | 164 039 |  |  | 164 537 |  |  | 164 040 |  |  | 164 605 |  |  |
| Evt | 15 592 387 |  |  | 42 768 888 |  |  | 16 985 748 |  |  | 8 516 687 |  |  |

- certified

- C : central
- F:forward
- L : local

- corrected

- Anne-Marie Magnan---ISN Grenoble

- November 21, 2002---NP meeting

## Possible interpretation of the events

- !

_**eee :**_
- 1st event : Z γ  e+e- γ
- 2nd event : Z  e+e-  e+e- γ
_**e**__**μμ**__** :**_
- Z W

- Anne-Marie Magnan---ISN Grenoble

- November 21, 2002---NP meeting

## Lego view of eee event 2

- Run 164 537
- Event 42 768 888

- e1= γ

- e2= e-

- e3= e+

- MET=16 GeV
- + PT (jet) = 37 GeV

- jet

- Anne-Marie Magnan---ISN Grenoble

- November 21, 2002---NP meeting

## XY view of eee event 2

- e1= γ

- e3= e+

- e2= e-

-  jet

- Anne-Marie Magnan---ISN Grenoble

- November 21, 2002---NP meeting

## Perspectives

- Switch to the _**Thumbnails**_, to analyze _**p13 data**_,
- Add _**Monte-Carlo simulation**_, to study the _**instrumental and physic background**_,
- Add _**trigger**_ requirement and study _**efficiency**_ with trigger simulation,
- Searches for dilepton + jets.
- 		    

- Anne-Marie Magnan---ISN Grenoble

- November 21, 2002---NP meeting