# Presentation: 615651

## IMU Triggers and Physics Motivations

- Woo-Hyun Chung
- University of Wisconsin

- U. of Wisconsin - Madison

- 2006-7-27

## Outline

-  Introduction (IMU System)
-  IMU Triggers (Past & Present)
-  Physics from IMU Triggers
-  Trigger Improvements for IMU
-  IMU Trigger Rates
-  Conclusions

- U. of Wisconsin - Madison

- 2006-7-27

## IMU(Intermediate Muon) System

- 			= BMU+BSU+TSU

- U. of Wisconsin - Madison

- 2006-7-27

## IMU Triggers

- Table:         PHYSICS_3_07 (until Jan 11th 2006)
- L1:	L1_BMU10_BSU_PT8
- 		L1_BMU10_BSUR_TSUO_&_CLC
- L2:	L2_CJET15_&_BMU10_PT11_L1_BMU10_BSU_PT8
- 		L2_CJET15_L1_BMU10_BSUR_TSUO
- L3:	MUON_BMU9_L2_BMU10_BSU_PT15_DPS
- 		MUON_CENTRAL_JET20_L1_BMU10_BSUR
- 		MUON_CENTRAL_JET20_L1_BMU10_PT8
- **IMU Front trigger dropped in PHYSICS_4_00 (Feb 2006)

- U. of Wisconsin - Madison

- 2006-7-27

## IMU Triggers (2)

- History:

| Date | Run N | Trigger Table | Changes |
| --- | --- | --- | --- |
| May 15 2003 | 162989 | PHYSICS_1_04_v-9 | Stream B 
First Stable version after bug fixes and 
                    With CJET15 added in L2
Production Dataset MUON_CALIB |
| Aug 26 2003 | 168087 | PHYSICS_1_05_v-8 | Added L3 Pt>9 GeV
Loose track-stub matching  (< 30 cm) |
| Jan 8    2004 | 177486 | PHYSICS_2_01_v-1 | IMUF L3 cuts made standard
IMUR inclusive trigger dropped
Production Dataset MUON_BMU |
| May 3  2004 | 182336 | PHYSICS_2_04_v-2 | Hadron timing added to all L1 |
| Feb 11 2006 | 211538 | PHYSICS_4_00 | IMUF dropped in all Level |

- U. of Wisconsin - Madison

- 2006-7-27

## Physics from IMU Triggers

- Inclusive Forward Muon Study from IMU:
- W Asymmetry (Dan Cyr)
- W/Z Cross Section
- Forward Muon can be used to improve sensitivity for statistically limited analyses
- Single Top:
- Overall ~14% gain over CMUP+CMX (Jason Slaunwhite)
- Higgs Analyses:
- gg->H->W+Wlvlv
- ZH->l+l-bb	: 17% gain (Beate and Ben)
- WH->lvbb	: 15% gain (Anyes)
- WH->WWW
- H->tautau
- 	**Newly reported IMU trigger efficiency is ~63% (w/ 3L XFT’s)

- U. of Wisconsin - Madison

- 2006-7-27

## Trigger Improvements for IMU

- Revival of 3L XFT in L1 to resurrect IMU Front Trigger
- 	(Ben Kilminster)
- Upgraded SVT tracks with IMU Trigger in L2
- 	(Paola Giannetti)
- L1 rate should be reasonable
- Other possibilities:
- Mezzanine card upgrade to use 4 hit BMU stubs to reduce trigger rates
- efficiency suffers, but shrink L1 rate ~4 times – James Bellinger
- How about DiMuon Trigger with central muons?
- Could be done easily in Muon Match Box
- Using Jet information in L1?
- Lepton + track trigger?

- U. of Wisconsin - Madison

- 2006-7-27

## IMU Trigger Rates (Recent)

- IMU Front Trigger
- IMU Rear Trigger
- IMUF rate increases slowly
- 	below 100E30, but catches up very quickly after
- L2 IMUF(+cjet) shoots up even more
- Special test run 192061
- 	at Lum ~25E30 shows IMUF is
- 	~5 times more than IMUR
- 	(without 3L XFT)
- 	More points necessary at high luminosity
- Store 4495 :
- 	PHYSICS_HIGHLUM_3_06
- 	PHYSICS_3_07
- Store 4590 :
- 	PHYSICS_3_09

- U. of Wisconsin - Madison

- 2006-7-27

## Conclusions

- IMU provides extended lepton (good quality – as good as CMX in every sense) coverage for rare Physics analyses, especially Higgs and Single Top
- Contributions from IMU Front Trigger to low statistics analyses could be significant
- Many options to reduce trigger rates at very high luminosity for specific Physics analysis

- U. of Wisconsin - Madison

- 2006-7-27