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Search for squarks and gluinos in events with hadronically decaying tau leptons, jets and missing transverse momentum in proton-proton collisions at $\sqrt{s}=13$ TeV recorded with the ATLAS detector

The collaboration
No Journal Information, 2016

Abstract (data abstract)
CERN-LHC. A search for supersymmetry in events with large missing transverse momentum, jets, and at least one hadronically decaying tau lepton has been performed using 3.2 fb$^{-1}$ of proton-proton collision data at $\sqrt{s}=13$ TeV recorded by the ATLAS detector at the Large Hadron Collider in 2015. Two exclusive final states are considered, with either exactly one or at least two tau leptons. No excess over the Standard Model prediction is observed in the data. Results are interpreted in the context of gauge-mediated supersymmetry breaking and a simplified model of gluino pair production with tau-rich cascade decays, substantially improving on previous limits. In the GMSB model considered, supersymmetry-breaking scale ($\Lambda$) values below 92 TeV are excluded at the 95% confidence level, corresponding to gluino masses below 2000 GeV. For large values of $\tan\beta$, values of $\Lambda$ up to 107 TeV and gluino masses up to 2300 GeV are excluded. In the simplified model, gluino masses are excluded up to 1570 GeV for neutralino masses around 100 GeV. Neutralino masses up to 700 GeV are excluded for all gluino masses between 800 GeV and 1500 GeV, while the strongest exclusion of 750 GeV is achieved for gluino masses around 1400 GeV.

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Data from Figure 6a

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mTtau distributions for "extended SR selections" of the 1 tau channel, for the Compressed SR selection without the mTtau >...

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Data from Figure 6b

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mTtau distributions for "extended SR selections" of the 1 tau channel, for the Medium Mass SR selection without the mTtau...

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Data from Figure 6c

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mTtau distributions for "extended SR selections" of the 1 tau channel, for the High Mass SR selection without the mTtau...

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Data from Figure 7a

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Kinematic distributions for "extended SR selections" of the 2-tau channel, for mTsum in the Compressed SR selection without the mTsum>1400...

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Data from Figure 7b

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Kinematic distributions for "extended SR selections" of the 2-tau channel, for mTtau1+mTtau2 in the High-Mass SR selection without the mTtau1+mTtau2>350GeV...

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Data from Figure 7c

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Kinematic distributions for "extended SR selections" of the 2-tau channel, for HT in the GMSB SR selection without the HT...

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Data from Figure 8

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Expected exclusion contour at the 95% confidence level for the simplified model of gluino pair production, based on the combined...

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Data from Figure 8

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Observed exclusion contour at the 95% confidence level for the simplified model of gluino pair production, based on the combined...

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Data from Figure 8

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Expected exclusion contour at the 95% confidence level for the simplified model of gluino pair production, based on results from...

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Data from Figure 8

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Expected exclusion contour at the 95% confidence level for the simplified model of gluino pair production, based on results from...

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Data from Figure 9

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Observed exclusion contours at the 95% confidence level for the gauge-mediated supersymmetry-breaking model, based on results from the 2 tau...

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Data from Figure 9

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Expected exclusion contours at the 95% confidence level for the gauge-mediated supersymmetry-breaking model, based on results from the 2 tau...

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Data from Auxiliary Figure 1

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Observed upper cross section limits in pb for the simplified model of gluino pair production for the combination of all...

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Data from Auxiliary Figure 2

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Best expected signal region for the simplified model of gluino pair production. The respective SR has been used in the...

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Data from Auxiliary Figure 3a

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Acceptance for the gluino production simplified model grid in the Compressed 1tau signal region.

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Data from Auxiliary Figure 3b

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Efficiency for the gluino production simplified model grid in the Compressed 1tau signal region.

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Data from Auxiliary Figure 3c

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Acceptance times Efficiency for the gluino production simplified model grid in the Compressed 1tau signal region.

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Data from Auxiliary Figure 4a

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Acceptance for the gluino production simplified model grid in the medium mass 1tau signal region.

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Data from Auxiliary Figure 4b

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Efficiency for the gluino production simplified model grid in the medium mass 1tau signal region.

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Data from Auxiliary Figure 4c

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Acceptance times Efficiency for the gluino production simplified model grid in the medium mass 1tau signal region.

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Data from Auxiliary Figure 5a

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Acceptance for the gluino production simplified model grid in the high mass 1tau signal region.

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Data from Auxiliary Figure 5b

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Efficiency for the gluino production simplified model grid in the high mass 1tau signal region.

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Data from Auxiliary Figure 5c

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Acceptance times Efficiency for the gluino production simplified model grid in the high mass 1tau signal region.

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Data from Auxiliary Figure 6a

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Acceptance for the gluino production simplified model grid in the compressed 2tau signal region.

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Data from Auxiliary Figure 6b

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Efficiency for the gluino production simplified model grid in the compressed 2tau signal region.

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Data from Auxiliary Figure 6c

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Acceptance times Efficiency for the gluino production simplified model grid in the compressed 2tau signal region.

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Data from Auxiliary Figure 7a

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Acceptance for the gluino production simplified model grid in the high mass 2tau signal region.

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Data from Auxiliary Figure 7b

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Efficiency for the gluino production simplified model grid in the high mass 2tau signal region.

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Data from Auxiliary Figure 7c

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Acceptance times Efficiency for the gluino production simplified model grid in the high mass 2tau signal region.

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Data from Auxiliary Figure 8a

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Acceptance for the GMSB model grid in the 2tau signal region.

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Data from Auxiliary Figure 8b

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Efficiency for the GMSB model grid in the 2tau signal region.

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Data from Auxiliary Figure 8c

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Acceptance times Efficiency for the GMSB model grid in the 2tau signal region.