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Search for direct top squark pair production in final states with two tau leptons in pp collisions at $\sqrt{s}=8$  TeV with the ATLAS detector

The ATLAS collaboration
Eur.Phys.J. C76 (2016) 81, 2016

Abstract (data abstract)
A search for direct pair production of the supersymmetric partner of the top quark, decaying via a scalar tau to a nearly massless gravitino, has been performed using 20 fb$^{-1}$ of proton-proton collision data at $\sqrt{s}=8$ TeV. The data were collected by the ATLAS experiment at the LHC in 2012. Scalar top candidates are searched for in events with either two hadronically decaying tau leptons, one hadronically decaying tau and one light lepton, or two light leptons. No significant excess over the Standard Model expectation is found. Exclusion limits at 95% confidence level are set as a function of the scalar top and scalar tau masses. Depending on the scalar tau mass, ranging from the 87 GeV LEP limit to the scalar top mass, lower limits between 490 GeV and 650 GeV are placed on the scalar top mass within the model considered.

  • Table 1

    Data from Figure 7 Top

    10.17182/hepdata.69768.v1/t1

    Distribution of $m_{\rm T}^{\rm sum}(\tau_{\mathrm{had}},\tau_{\mathrm{had}})$ for the events passing all the hadron-hadron signal region requirements, except that on the variable...

  • Table 2

    Data from Figure 7 Bottom

    10.17182/hepdata.69768.v1/t2

    Distribution of $m_{{\rm T}2}(\tau_{\mathrm{had}},\tau_{\mathrm{had}})$ for the events passing all the hadron-hadron signal region requirements, except that on the variable itself....

  • Table 3

    Data from Figure 8 Top

    10.17182/hepdata.69768.v1/t3

    Distribution of $m_{{\rm T}2}(b \ell, b \tau_{\mathrm{had}})$ for events passing all the lepton-hadron LM signal region requirements, except that on...

  • Table 4

    Data from Figure 8 Bottom

    10.17182/hepdata.69768.v1/t4

    Distribution of $m_{{\rm T}2}(\ell, \tau_{\mathrm{had}})$ for events passing all the lepton-hadron HM signal region requirements, except that on the variable...

  • Table 5

    Data from Figure 9

    10.17182/hepdata.69768.v1/t5

    Expected exclusion contour at 95% CL in the (scalar top, scalar tau) mass plane from the combination of all selections.

  • Table 6

    Data from Figure 9

    10.17182/hepdata.69768.v1/t6

    Observed exclusion contour at 95% CL in the (scalar top, scalar tau) mass plane from the combination of all selections.

  • Table 7

    Data from Auxiliary Figure 1

    10.17182/hepdata.69768.v1/t7

    The region / analysis with the best expected upper limit on the signal cross-section (95% CL) as a function of...

  • Table 8

    Data from Auxiliary Figure 2

    10.17182/hepdata.69768.v1/t8

    The 95% CL excluded cross section times branching ratio, using the best expected SR / analysis for each mass point.

  • Table 9

    Data from Auxiliary Table 4

    10.17182/hepdata.69768.v1/t9

    The cut flow on the raw generated events for the signal point (scalar top mass, scalar tau mass) = (337,148)...

  • Table 10

    Data from Auxiliary Table 5

    10.17182/hepdata.69768.v1/t10

    The cut flow on the raw generated events for the signal point (scalar top mass, scalar tau mass) = (195,87)...

  • Table 11

    Data from Auxiliary Table 6

    10.17182/hepdata.69768.v1/t11

    The cut flow on the raw generated events for the signal point (scalar top mass, scalar tau mass) = (391,337)...

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