1. SUSY DILEPTON TRIGGER MONITORING
M.Rossi
(Udine University)
July 26, 2004
Multilepton Meeting

2. MONITORING VARIABLES R  events collected by the trigger path having
one of the corresponding reconstructed lepton
(per trigger path: R11st lepton, R22nd lepton)
Q  events, that have two reconstructed leptons,
not collected by the corresponding trigger path
Rate  fraction of events collected by trigger path
over the luminosity of the run
July 26, 2004
Multilepton Meeting

3. SELECTED FOLLOWING DQM CRITERIA
RUNS
SELECTED FOLLOWING DQM CRITERIA
ONLINE bits required to be good:
CLC,L1T,L2T,L3T,CAL,COT,CMU,CMP,CMX,SMX
OFFLINE bits required to be good:
COT,CAL,CMU,CMP,CMX
From 2002 to most recently available data excluding runs with COT problems
1459 RUNS, 284 pb-1
July 26, 2004
Multilepton Meeting

4. RUN QUALITY EVALUATION first attempt at evaluation based on deviation from the local average of monitoring variables
Local Average for i-th run:
where X = R,Q,Rate
If i-th run is marked as suspect
July 26, 2004
Multilepton Meeting

5. Tighter electron L3 triggers
R CEM4_CEM4
ALL RUNS
run
CUT on CES in L2
run
Tighter electron L3 triggers
w/o SUSPECT RUNS
SUSPECT RUNS
160761
163130
178852
July 26, 2004
Multilepton Meeting

6. MONITORING VARIABLES FOR CEM4_CEM4
ALL RUNS
w/o SUSPECT RUNS
July 26, 2004
Multilepton Meeting

7. MONITORING VARIABLES FOR CEM4_CEM4_L2_CEM12_PT8
ALL RUNS
w/o SUSPECT RUNS
July 26, 2004
Multilepton Meeting

8. MONITORING VARIABLES FOR CEM4_CEM4_L2_CEM12_PT8
ALL RUNS
w/o SUSPECT RUNS
July 26, 2004
Multilepton Meeting

9. Summary of Monitoring Run processing up-to-date
R, Q distributions indicate a
locally stable trigger behaviour
Rate fluctuations under
investigation
First attempt at run quality
evaluation based on trigger
monitoring
July 26, 2004
Multilepton Meeting

10. Other activities and future plans
Monitoring finalized by mid- August
Then concentrate on efficiency calculations using backup triggers
Exclusive backutp trigger rates by end of August
Trigger efficiencies by end September
July 26, 2004
Multilepton Meeting

11. BACKUP DOWNSTREAM APPROACH
For each TRIGGER PATH (T.P.) count:
N : # evts selected by the T.P.
N1: # evts with offline lepton 1
N2: # evts with offline lepton 2
In ideal conditions R=1 (R~purity)
For each lepton “type”, expect R values from different T.P. comparable and stable in time
R1 ≡ N1/N and R2 ≡ N2/N
July 26, 2004
Multilepton Meeting

12. BACKUP UPSTREAM APPROACH
N12 ≡ events with lepton 1 && lepton 2
offline level
N0 ≡ events failing the i-th T.P.
Qi ≡ N0/NAB
In ideal conditions Qi = 0
July 26, 2004
Multilepton Meeting