358 details
357 details
?
HeavyFlavor: L2 performance is back to that of CMSSW_3_5_0_pre3 by removing the wide
patterns from RPCs and therefore L1 ghosts
and due to the improved handling of L1 ghosts at L2
? Jets: The efficiency is better than in the previous release. Turn-on curves are sharper. It is due to the fact that scheme6 is now used instead of the old
SchemeB.
? Photons: see discussion in the
trigval forum
, outcome: performance as expected in 357
? Susy: Lower efficiencies for almost all the L1 triggers. Lower efficiencies in many HLT paths.
For Electron paths, much larger efficiency for HLT_Electron_SiStrip paths, but lower for the others. For photon paths, larger efficiency for DoublePhoton paths, lower for the others. Lower efficiency for almost all the jet, MET and HT paths. Much lower efficiency for BTagIP_Jet* paths. Lower efficiency for cross triggers Ele10_TripleJet and Ele10_HT. Discrepancies in distributions for reco electrons, photons, muons, jets and MET, but this is s reco issue: they are not trigger dependent.
355,356 details
? release 355 has been deprecated and replaced by 356; the difference between the two is unrelated to the trigger; the 355 samples should be used for validation (no 356 samples have been produced)
354 details
353 details
? Muon: same issue with an L1 inefficiency as seen since 3.5.0.pre5
353 details
? Muon: same issue with an L1 inefficiency as seen since 3.5.0.pre5
? BPAG: drop of ~10% efficiency in the barrel at L2 in HLT_Mu5, HLT_Mu9 and HLT_DoubleMu3 paths due to the presence of L1 ghosts.
351/2 details
? Top: identical to 350
? Tau: slightly broader distributions for the ECAL isolation (mean value 1.48 vs 1.38 in 351)
? Muon: same issue with an L1 inefficiency as seen since 3.5.0.pre5
? Susy: ~20% lower efficiency for HLT_BTagIp_Jet80 and HLT_BTagJet120. Difference in reco electron distributions for these two triggers. (wrt 342)
? Higgs: small decrease in HLT_Mu9 and HLT_IsoMu3 efficiencies.
? BPAG: drop of ~10% efficiency in the barrel at L2 in HLT_Mu5, HLT_Mu9 and HLT_DoubleMu3 paths due to the presence of L1 ghosts.
350 details
? Muons: Drop in L1 efficiency of ~5% for most paths that use an L1 quality cut of 5 or 6.
? Bphysics: Drop of ~10% efficiency in the barrel at L2 in HLT_Mu5, HLT_Mu9 and HLT_DoubleMu3; these paths have pT cuts at L2 and presumably a degradation in pT resolution is the cause of the problem.
? Electrons in fastsim: underestimate of the pixel-matching efficiency compared to the full simulation at the edge of the pixel-acceptance, reduced wrt 350pre5 but still remains; small underestimation of efficiency in the track matching step in the barrel/disk transition region
? Top: overall muon trigger efficiency drop wrt 350pre3 reduced but sill visible
? Top fastsim: slightly higher muon efficiencies(2-3%) wrt Fullsim, otherwise agreement with fullsim is good
? Higgs: muon efficiencies now compatible with 3.5.0.pre3; HLT_Ele10_LW_EleId_L1R still a bit lower as expected
?
updates on muon issues in 350:
(i) L2 inefficiencies are found to be due to L1: modified spectrum of the seeding L1 muons;
run 350 HLT on 350pre3 sample using the L1 object available there and observed no problems (Zoltan);
reco inefficiencies, see thread in
muon obj hn
concludes diffs verified wrt 350pre5 are not due to changes after the raw stage; no clear explanation available in terms of modified tags introduced (Andrea P.).
Updates by RPC/GMT experts on the L1 DPG
meeting 4.3.2010
, issue continues to be studied (NL).
?
update on fastsim issues:
in 351/2 expect better agreement Fast/Full in the Tracking in endcaps, and in the Jets/MET energy scale (Andrea P.), see
famos-hn
? BPAG: drop of ~10% efficiency in the barrel at L2 in HLT_Mu5, HLT_Mu9 and HLT_DoubleMu3 paths due to the presence of L1 ghosts.
350pre5 details
? Muons: Drop in L1 efficiency of ~10% for most paths that use an L1 quality cut of 5 or 6.
? BPAG: Drop in L1 efficiency of ~10% in the barrel part for
HLTLevel1GTSeeds that require a pT cut
? Electron, fastsim: overall good agreement with full-sim, except for minor issues: in pixel end-caps, and track matching step, which perform below full-sim expectations
? Electron,
updates on pixel-less seeding:
looking at the map of the SiStrip
dead channels, the efficiency loss looks compatible with the damages in the
phi coordinate
;
whereas for the
eta coordinate
the loss appears mainly in the TIB+ while the majority of dead channels are in the TIB-; this could be explained, though, if the SiStrip seeding does not look for all layers, but gives priority (or is exclusive) to TIB inner layers; in this case the leaking cooling loop of TIB+ L2 could explain the fact. (from R.Covarelli)
confirmed (Avishek) that SiStrip seeding does not look in all layers (use first two rings of TIB, all rings of TID, and the first two rings of the first three wheels of TEC), and does give priority to TIB rings 1 and 2 through various cuts. This is done to reduce execution time and seed multiplicity, but makes the algorithm suffer when there are such hardware problems.
? Muon,
update of L1 inefficiency:
the source of the problems appears to have been
identified
as related to introduction of RPC cosmic patterns which affected the GMT muons (from Vasile); the temporary solution being implemented involves updating a GMT record from the global tag (requiring a new global tag for 35X); a more persistent solution should also be envisaged in the future.
? BPAG: drop of ~10% efficiency in the barrel at L2 in HLT_Mu5, HLT_Mu9 and HLT_DoubleMu3 paths due to the presence of L1 ghosts.
350pre3 details
? Electrons: In addition to the track matching problem seen in recent releases there is now an additional problem with the pixelless seeding (as seen for HLT_Ele15_SiStrip_L1RD).
Checked not to be related to 32 vs 64 bit archs.
Avishek traced these problem to the transition from 'STARTUP3X_V15::All' to 'STARTUP3X_V14::All'.
350pre1,2 details
? Electrons: track matching has efficiency problems
? Top: HLT_IsoMu9 efficiency seems to be slightly lower (~2-3%) wrt 340.
? Higgs: HLT_Ele10_LW_EleId_L1R efficiency not yet recovered.