TABLE 1 - SIGNAL SAMPLES USED FOR THIS STUDY | |||
---|---|---|---|
Sample | Cross section (pb) | N(events) | Luminosity (1/pb) |
/tt0j_mT_70-alpgen/CMSSW_1_5_2-CSA07-2231/GEN-SIM-DIGI-RECO |
334.51 | 1521744 | 4549.2 |
/tt0j_mT_70-alpgen/CMSSW_1_6_8-CSA07-3696-misAlCa100pb-FASTSIM/AODSIM |
Table 1.1- Cross section yields for dilepton channel at generator level in pb | ||||||
---|---|---|---|---|---|---|
Event type | 0 j |
1 j |
2 j |
3 j |
4 j |
Total |
Madgraph + PYTHIA 6 ordered showers w/ | 14.00 | 9.93 | 4.37 | 2.46 | n.a. | 30.76 |
Madgraph + PYTHIA 6 ordered showers w/ | 5.95 | 5.56 | 3.61 | 3.83 | n.a. | 18.96 |
ALPGEN | 15.2 | 4.1 | 0.85 | 0.14 | 0.04 | 20.34 |
MatchChecker
utility.
Table 2.1 - Top kinematics at MC level for tt~0j (GEN) | ||||
---|---|---|---|---|
spectrum | distribution | for the pair | between and | invariant mass of the pair |
Table 3.1 - Jet kinematics at RECO level for the tt~0j samples | ||
---|---|---|
Variable | RECO | RECO + matched |
Jet multiplicity | n.a. | |
emf (electromagnetic fraction of the energy deposit of the jets) | ||
(b-tag discriminant for the high efficiency track counting algorithm |
Alpgen
samples were probably generated with a different criteria for matching the jets. That's the reason for the higher multiplicity in those samples.
Table 4.1 - Lepton kinematics at RECO level for the tt~0j samples | |||||||
---|---|---|---|---|---|---|---|
Lepton | Electron | Muon | |||||
Variable | RECO | RECO + matched | RECO | RECO + matched | |||
Lepton multiplicity | n.a. | n.a. | |||||
n.a. | n.a. | ||||||
tracker iso | |||||||
calo iso |
tt~0j
samples. The statistics need no be increased in the Alpgen
reconstructed with fastsim in order to have better undersanding of the systematics.