Interpretation of Searches for Supersymmetry

Abstract

The results of CMS searches for Supersymmetry are interpreted in the context of Simplified Models. These results are based on data samples with a corresponding integrated luminosity of up to 4.98\fbinv produced in proton--proton collisions at a center-of-mass energy of 7~TeV collected by the CMS experiment at the LHC. This analysis provides a compilation of acceptance predictions and cross section upper limits for a range of Simplified Models and mass parameters. The results provide information that can be used to constrain other theoretical models. They also provide a comparison of different CMS search strategies.

Link to the PAS

Approved Tables and Plots from SUS-11-016 ( click on plot to get .pdf )

Table 1:

Table	Abbreviated Caption
	Table 1:Summary of the simplified models used in this document.

Figure 1 2 3 4 5:

Figure	Figure	Abbreviated Caption
		Figure 1: Diagrams of the hadronic models: gluino pair production (T1,left) and squark anti-squark production (T2,right).
		Figure 2: Diagrams of the heavy flavor models: T1bbbb (left), T1tttt (right).
		Figure 3: Diagrams of the dilepton models: T3lh (left), T5lnu (right).
		Figure 4: Diagrams of T3w (left), T5zz (right).
		Figure 5: Diagrams of chargino and neutralino production: TChizz (left,top) TChiwz (right,top), and TChiSlepSlep (bottom).

Figure 6:

Total alphaT selection efficiency (left) and 95% CL upper limits on the gluino and squark pair-production cross sections (right) for the topologies T2 (top), T1(middle) and T5zz (bottom) as a function of gluino or squark mass and the LSP mass. Plots posted also in https://twiki.cern.ch/twiki/pub/CMSPublic/PhysicsResultsSUS11003

Simplified model topology name	Efficiency	Limit
"T2"
"T1"
"T5zz"

Figure 7:

Selection that has the best expected cross section upper limit (left) and 95% CL upper limits on the squark/gluino pair-production cross sections (right) for the topologies T2 (top), T1 (middle) and T5zz (bottom) as a function of the gluino and LSP mass. Plots posted also in https://twiki.cern.ch/twiki/pub/CMSPublic/PhysicsResultsSUS11004

Simplified model topology name	Best Selection	Limit
"T2"
"T1"
"T5zz"

Figure 8:

T3w topology and single lepton analysis: Typical signal selection acceptance times ef- ficiency for HT > 500 GeV (top, left); HT selection that yields the best expected limit (top, right) and upper cross section limits as a function of the gluino and LSP mass for the intermediate chargino (bottom, left); and the limits for different locations of the chargino mass and fixed LSP mass (bottom right). The first three figures are for x = 1/4 as defined in Eq. 1.

Figure 9:

Figure 9: T5zz topology: Signal selection acceptance times efficiency normalized to the events where there is at least one Z boson decaying leptonically (e, μ, τ) (left), and upper cross section limits on the inclusive Z boson decay mode (right) for the E̸ T (top) and JZB (bottom) analyses. Results are shown as a function of gluino and intermediate neutralino mass for a massless LSP. Plots posted also in https://twiki.cern.ch/twiki/pub/CMSPublic/PhysicsResultsSUS11021

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Figure 10:

Figure 10: T5zz topology: Signal selection acceptance times efficiency normalized to events where there is at least one Z boson decaying leptonically (e, μ, τ) (left), and upper cross section limits on the inclusive Z boson decay mode (right) for the E̸ T (top) JZB (bottom) analyses. Results are shown as a function of the gluino and LSP mass, with the intermediate neutralino mass set using x = 1/4. Plots posted also in https://twiki.cern.ch/twiki/bin/view/CMSPublic/PhysicsResultsSUS11021

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Figure11.

The upper limit on cross section times branching ratios is shown as function of gluino mass and several masses for the intermediate neutralino with a massless LSP. Plots posted also in https://twiki.cern.ch/twiki/bin/view/CMSPublic/PhysicsResultsSUS11021

Figure 12:

SS dileptons: Best selection (top left), selection efficiency for the “HighPT HT ≥ 80,̸HT ≥120”selection(topright),andcrosssectionupperlimitforthebestselection(bottom), for the T5lnu topology, as a function of gluino and LSP mass, with the chargino mass set using x=1/2

Figure 13:

OS dileptons: Efficiency and cross section upper limit for the topology T3lh from edge reconstruction (top), and from the E̸ T and HT selection (bottom). Results are shown as a function of gluino and LSP mass, with the chargino mass set using x = 1 . 2

Figure 14

Figure14. MET +b: Selection with best expected limit, where 1T and 2L correspond to the ≥1 tight b-tag and ≥ 2 loose b-tag selections (top). The selection efficiency (bottom left) and cross section upper limit (bottom right) on the T1bbbb simplified model. Plots posted also in https://twiki.cern.ch/twiki/pub/CMSPublic/PhysicsResultsSUS11006

T1bbbb

Figure 15

Plots posted also in https://twiki.cern.ch/twiki/pub/CMSPublic/PhysicsResultsSUS11005

T1bbbb

Figure 16,17,18

Plots posted also in https://twiki.cern.ch/twiki/pub/CMSPublic/PhysicsResultsSUS11006 Plots posted also in https://twiki.cern.ch/twiki/pub/CMSPublic/PhysicsResultsSUS11010

"T1tttt"
"T1tttt"

Figure 19:

Figure 19: Cross section upper limit on the topology T1tttt for the E̸ MET +b and SS analyses as a function of gluino mass and for a fixed LSP mass of 50 GeV. Plots posted also in https://twiki.cern.ch/twiki/pub/CMSPublic/PhysicsResultsSUS11010

"T1tttt"

Figure 20:

Figure 20. SS+b: Efficeincy and cross section upper limit on the topology T1tttt as a function of gluino and LSP mass.

"T1tttt"

Figure 21:

Figure21: Multileptons and TChiSlepSlep: selection efficiency (left, top); cross section upper limit as function of chargino and LSP mass (right, top) and for a fixed LSP mass (bottom). Plots posted also in https://twiki.cern.ch/twiki/bin/view/CMSPublic/PhysicsResultsEXO11045SUS11013

"TChiSlep"

Figure 22 :

Plots posted also in https://twiki.cern.ch/twiki/bin/view/CMSPublic/PhysicsResultsEXO11045SUS11013 Figure 22: Multileptons and TChiwz and TChizz: Signal selection efficiency (left) and cross section upper limit (right) for TChiwz (top) and TChizz (bottom). The selection efficiency is shown as a function of chargino or heavy neutralino mass and LSP mass. The upper limit is shown as a function of chargino or heavy neutralino mass for a massless LSP.

"TChiwz"
"TChizz"

Figure 23 24 25 :

Figure 23. Exclusion limits for gluino and squark masses, for m(chi0)=0 GeV (dark blue) and m(mother)-m(chi0)=200 GeV (light blue), for each analysis, for the hadronic results. For limits on m(gl), m(sq) >> m(gl), and vice versa. sigma(prod) = sigma(NLO-QCD). If not specified otherwise, x=0.5 for intermediate mass states.

"Summary hadronic"

Figure 24. Exclusion limits for gluino and squark masses, for for m(chi0)=0 GeV (dark blue) and m(mother)-m(chi0)=200 GeV (light blue), for each analysis, for the leptonic results. For limits m(gl), m(sq) >> m(gl), and vice versa. sigma(prod) = sigma(NLO-QCD). If not specified otherwise, x=0.5 for intermediate mass states. For T3w and T5zz, results for all three values of x are presented.

"Summary leptonic"

Figure 25. Best exclusion limits for gluino and squark masses, for m(chi0)=0 GeV (dark blue) and m(mother)-m(chi0)=200 GeV (light blue), for each topology, for all results. For limits onm(gl), m(sq) >> m(gl), and vice versa. sigma(prod) = sigma(NLO-QCD). If not specified otherwise, x=0.5 for intermediate mass states. For T3w and T5zz, results for all three values of x are presented.

"Summary best"

Figure 26

Exclusion contours for several analyses: (left) T1bbbb/T1; (right) T5zz.

-- WolfgangWaltenberger - 01-May-2012