# Difference: PhysicsResultsSUS12002 (19 vs. 20)

#### Revision 202012-07-15 - DavidStuart

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 META TOPICPARENT name="SUS12002"

# Search for supersymmetry in hadronic final states using MT2 in pp collisions at sqrt(s) = 7 TeV

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##### MT2-distributions
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Figure Figure2 Abbreviated Caption
MT2 distribution for the MT2-Analysis with HT > 750 GeV. The last bin contains the overflow. The different MC backgrounds are stacked on top of each other and normalized to 4.73 fb−1. The LM6 signal distribution is normalized to the same integrated luminosity and overlayed on the Standard Model backgrounds. The right plot also includes a data/MC ratio comparison. Only statistical uncertainties are shown in the ratio plot, both for data and MC.
MT2 distribution for the MT2-Analysis with HT > 750 GeV. The bin size is variable chosen such that the last five bins coincide with the definition of the signal regions. The last bin contains the overflow. The different MC backgrounds are stacked on top of each other and normalized to 4.73 fb−1. The LM6 signal distribution is normalized to the same integrated luminosity and overlayed on the Standard Model backgrounds. The right plot also includes a data/MC ratio comparison. Only statistical uncertainties are shown in the ratio plot, both for data and MC.
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Figure Abbreviated Caption

MT2 distribution for the MT2-Analysis with HT > 750 GeV. The last bin contains the overflow. The different MC backgrounds are stacked on top of each other and normalized to 4.73 fb−1. The LM6 signal distribution is normalized to the same integrated luminosity and overlayed on the Standard Model backgrounds. The lower plot also includes a data/MC ratio comparison. Only statistical uncertainties are shown in the ratio plot, both for data and MC.

MT2 distribution for the MT2-Analysis with HT > 750 GeV. The bin size is variable chosen such that the last five bins coincide with the definition of the signal regions. The last bin contains the overflow. The different MC backgrounds are stacked on top of each other and normalized to 4.73 fb−1. The LM6 signal distribution is normalized to the same integrated luminosity and overlayed on the Standard Model backgrounds. The lower plot also includes a data/MC ratio comparison. Only statistical uncertainties are shown in the ratio plot, both for data and MC.

##### QCD factorization method
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 Figure illustrating the QCD estimation method in data. The data shows the ratio as a function of MT2. The solid points correspond to raw data after all selection cuts, while the dashed points correspond to data after subtracting electroweak and tt̄ backgrounds. An exponential fit (green curve) is performed in the region 50 < MT2 < 80 GeV where the non-QCD contribution is minimal. The constant term of the final functional model (blue curve) is taken as the value of the exponential at MT2 = 250 GeV.
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 Figure illustrating the QCD estimation method in data. The data shows the ratio as a function of MT2. The solid points correspond to raw data after all selection cuts, while the dashed points correspond to data after subtracting processes other than QCD (i.e., electroweak and tt̄). An exponential fit (green curve) is performed in the region 50 < MT2 < 80 GeV where the non-QCD contribution is minimal. The constant term of the final functional model (blue curve) is taken as the value of the exponential at MT2 = 250 GeV.

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##### Z(nunu) from Gamma+jets
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Figure1 Figure2 Abbreviated Caption
Photon MT2 spectrum, where the photon was added to the MET-vector to mimic the Z(nunu) kinematics. The right plot also includes a data/MC ratio comparison.
Left: Vector boson transverse momenta for and events for data and MC in 4.97 fb-1. Right: to ratio as a function of vector boson transverse momenta both for data and MC. Only statistical errors are shown.
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Figure Abbreviated Caption

Photon MT2 spectrum, where the photon was added to the MET-vector to mimic the Z(nunu) kinematics. The lower plot also includes a data/MC ratio comparison.

Top: Vector boson transverse momenta for and events for data and MC in 4.97 fb-1. Bottom: to ratio as a function of vector boson transverse momenta both for data and MC. Only statistical errors are shown.

##### Lost Lepton background estimate
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Figure Figure2 Abbreviated Caption
Muon transverse momentum for the lepton selection used in the Lost Lepton method. The right plot also includes a data/MC ratio comparison. Only statistical uncertainties are shown in the ratio plot, both for data and MC.
MT2 distribution for the events with a reconstructed muon. All selection cuts are applied (but the lepton veto is inverted). The right plot also includes a data/MC ratio comparison. Only statistical uncertainties are shown in the ratio plot, both for data and MC.
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Figure Abbreviated Caption

Muon transverse momentum for the lepton selection used in the Lost Lepton method. The lower plot also includes a data/MC ratio comparison. Only statistical uncertainties are shown in the ratio plot, both for data and MC.

MT2 distribution for the events with a reconstructed muon. All selection cuts are applied (but the lepton veto is inverted). The lower plot also includes a data/MC ratio comparison. Only statistical uncertainties are shown in the ratio plot, both for data and MC.

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### MT2b-Analysis

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Figure Figure2 Abbreviated Caption
MT2 distribution for the MT2b-Analysis with HT > 750 GeV. The last bin contains the overflow. The different MC backgrounds are stacked on top of each other and normalized to 4.73 fb−1. The LM9 signal distribution is normalized to the same integrated luminosity and overlayed on the Standard Model backgrounds. The right plot also includes a data/MC ratio comparison. Only statistical uncertainties are shown in the ratio plot, both for data and MC.

MT2 distribution for the MT2b-Analysis with HT > 750 GeV. The bin size is variable chosen such that the last four bins coincide with the definition of the signal regions. The last bin contains the overflow. The different MC backgrounds are stacked on top of each other and normalized to 4.73 fb−1. The LM9 signal distribution is normalized to the same integrated luminosity and overlayed on the Standard Model backgrounds. The right plot also includes a data/MC ratio comparison. Only statistical uncertainties are shown in the ratio plot, both for data and MC.

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Figure Abbreviated Caption

MT2 distribution for the MT2b-Analysis with HT > 750 GeV. The last bin contains the overflow. The different MC backgrounds are stacked on top of each other and normalized to 4.73 fb−1. The LM9 signal distribution is normalized to the same integrated luminosity and overlayed on the Standard Model backgrounds. The lower plot also includes a data/MC ratio comparison. Only statistical uncertainties are shown in the ratio plot, both for data and MC.

MT2 distribution for the MT2b-Analysis with HT > 750 GeV. The bin size is variable chosen such that the last four bins coincide with the definition of the signal regions. The last bin contains the overflow. The different MC backgrounds are stacked on top of each other and normalized to 4.73 fb−1. The LM9 signal distribution is normalized to the same integrated luminosity and overlayed on the Standard Model backgrounds. The lower plot also includes a data/MC ratio comparison. Only statistical uncertainties are shown in the ratio plot, both for data and MC.

### Background prediction

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