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CMSPublic Web>PhysicsResults>PhysicsResultsJME>PhysicsResultsJME2010MET (2012-11-25, TaiSakuma) EditAttachPDFMET performance plots for 2010
CMS-JME-10-009
[CDS]
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| Calo MET distributions in a minimum-bias data sample without (black dots) and with (open circles) cleaning and filters, compared to simulation. | |
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| (left) Probability of finding a beam-halo tagged event in muon-triggered events. Results are shown as a function of the beam intensity. (right) PF MET distribution for all the events from muon and Calo MET triggers that were analyzed, and for the subset of these events that were identified as beam halo. | |||
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| Distribution of masked ECAL channels in (left) barrel: h-f view of 170360 individual crystals, and (right) endcaps: x-y view of 27400 individual crystals. | |||
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| Distribution of (left) Calo MET, (middle) TC MET, and (right) PF MET, normalized to unit area, for events containing at least 2 jets with pjet1(2)T > 50 (25) GeV (black solid), and for the subsets of these events with a jet aligned with MET within Δφ(MET,jet) < 0.2 and pointing towards a masked ECAL cell (red dotted), the barrel-endcap boundary (green dot-dashed), and the endcap-forward boundary (blue dashed) in simulation. | |||||
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| Fraction of dijet events in data (points) and simulation (red band) with a jet aligned to MET within Δφ(MET,jet)<0.2 and pointing towards (left) a masked ECAL channel, (middle) the barrel-endcap boundary, and (right) the endcap-forward boundary, as functions of MET. | |||||
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| Distribution of qT for events selected as photon+jet candidates. Predicted rates from simulation for signal and backgrounds are also shown. QCD refers to multijet events. | |
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| (left) Invariant mass distribution of the two leading electrons and (right) invariant mass distribution of the two leading muons, for the Z boson candidates, along with the predicted distributions from simulation. QCD refers to multijet events. | |||
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| The qT distribution for Z boson candidates in (left) the electron channel and (right) the muon channel, along with the prediction from simulation. Systematic uncertainties are shown as grey bands. | |||
| ull distributions for PF MET for (top, left) γ (top, middle) Z→e+e- and (top, right) Z→μ+μ- events; u⊥ distributions for PF MET for (bottom, left) γ (bottom, middle) Z→e+e-, and (bottom, right) Z→μ+μ- events. Distributions are for events containing one PV, with a correction for residual pile-up contamination. Statistical uncertainties and systematic uncertainties on the removal of events with more than one PV and on the boson qT spectrum are shown as grey bands on the prediction from simulation. QCD refers to multijet production. | |||||
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| Response curves for events with one primary vertex, for (left) Calo MET, (middle) TC MET, and (right) PF MET. Results are shown for photon events (full blue circles), Z→e+e- events (open red circles) and Z→μ+μ- events (open green squares). The upper frame of each figure shows the response in data; the lower frame shows the ratio of data to simulation. The vertical axis labels at the far left apply to all three subfigures. | |
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| Resolution curves for components of hadronic recoil measured in direct photon candidate events with one primary vertex, (left) parallel to the boson direction, and (right) perpendicular to the boson direction. Data and simulation are indicated by points and histograms, respectively. Black circles denote Calo MET, pink squares TC MET, and blue triangles PF MET. Shaded regions indicate statistical uncertainties on the simulation. | |||
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| Resolution curves for components of hadronic recoil calculated using PF MET, measured in events with one primary vertex, (left) parallel to the boson direction, and (right) perpendicular to the boson direction. Z→μ+μ-, Z→e+e- and γ events are indicated by open green squares, open red circles, and full blue circles, respectively. The lower frame indicates the ratio of data to simulation. The vertical axis labels at the far left apply to both subfigures. | |
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| Calibrated METx,y resolution versus calibrated PF SumET for Calo MET, TC MET, and PF MET in data and in simulation. | |
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| PF MET distributions in 2-, 3-, and 4-jet events, in selected Calo SumET bins. | |||||
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| The ratio of the responses for the component of the induced MET along the boson direction, measured in g events containing 1 PV and at least 2 PVs, for (left) Calo MET, (middle) TC MET, and (right) PF MET. Also given is the best fit value for the average ratio, which corresponds to the solid, red line. | |||||
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| Resolution versus photon qT for the parallel component (top) and perpendicular component (bottom) for (left to right) Calo MET, TC MET, and PF MET, for events with 1 (circles), 2 (squares), and 3 (triangles) reconstructed primary vertices. | |||||
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| Resolution versus the qT of the Z for the parallel component (top) and perpendicular component (bottom) for (left to right) Calo MET, TC MET, and PF MET, for events with 1 (circles), 2 (squares), 3 (triangles), and 4 (diamonds) reconstructed primary vertices. | |||||
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| PF MET distributions in pile-up events. The figures show a comparison between the one- and n-vertex shapes (n = 2, ...., 7) and the results of a simultaneous fit of eq. (6.2) to the n-vertex shapes. The one-vertex distribution is normalized to the n-vertex distribution for each plot. | |
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| The PF MET (left) and uT (right) distributions in W→ eν (top) and W→μν (bottom) candidate events. Both data (points) and simulation (solid lines) are shown. The plots on the right include selection requirements on MET and MT, while those on the left do not. | |||
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| Fraction of events in a multijet sample that contain a jet tagged as a b jet by the SSV and SMbyPt taggers for (left) Calo MET and (right) PF MET. | |||
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| Distributions of the MET significance SPF (left) and the corresponding probability of χ2, P(χ2) (right), for dijet event samples in data (points) and simulation (solid histograms) with 30GeV (top) and 60GeV (bottom) jet pT thresholds. The dashed histograms show the simulation distributions with true MET contributions, from physics and acceptance effects, subtracted event-by-event. The dotted line overlaid on the SPF distributions shows a reference pure exponential function. Each inset expands the small P(χ2) region. | |||
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| Distributions of the MET significance (left) and P(χ2) (right) for events with a single interaction vertex (histogram) and multiple interaction vertices (points) in the 60GeV threshold dijet sample. The inset expands the small P(χ2) region. | |||
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| (left) Efficiency curves for W →eν signal versus backgrounds varying the minimum value of MET (solid lines), of SPF (dotted lines), and of MET/√SumET (dot-dash line), with the 95% efficient (blue) or 80% efficient (red) electron isolation criterion applied. (right) Distributions of SPF in candidate W!en events from data (points) and simulation (stacked histograms). The simulation components, from top to bottom, are signal (mustard) and backgrounds from jets (purple), γ+jets (black), Z→e+e- (yellow), and W→τν(orange). The simulation is scaled by a fit to the data with floating normalizations for the signal and the total background. | |||
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| Efficiency versus minimum threshold curves for W→eν signal and for total background for different numbers of interaction vertices with a minimum applied MET threshold (left) and a minimum applied SPF threshold (right). | |||
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| Efficiency curves for W→eν signal versus backgrounds, varying the minimum value of MET (solid lines) and of SPF (dotted lines) for events with two interaction vertices (blue) or at least five interaction vertices (red). | |
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| Response for PF MET versus γ qT for various jet correction thresholds for γ candidate events with 1 primary vertex (left) and more than 1 vertex (right). | |||
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| Ratio of PF MET resolution with type-I corrections to the the PF MET resolution without type-I corrections for parallel (left) and perpendicular (right) components of PF MET versus γ qT, for various jet correction thresholds for γ candidate events with 1 primary vertex (top) and more than 1 vertex (bottom) after correction for scale, using scale corrections similar to those shown in figure 10. | |||
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| Kinematic definitions for dijet events. | |
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| Mean values of METjj as a function of average pT of the two leading jets (pavgT) in dijet events compared with Monte Carlo simulation (dashed lines) for uncorrected, type-I corrected, and type-II corrected (left) Calo MET and (right) PF MET. The blue band on the distribution with type-I corrections reflects the uncertainty on the jet energy scale. The red band on the distribution with type-II corrections corresponds to the uncertainties on the jet energy scale and statistical uncertainties due to the size of the Z→e+e- sample from which the correction for unclustered energies was derived. | |||
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