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Searches for heavy long-lived charged particles with the ATLAS detector in proton-proton collisions at $\sqrt{s}=8$ TeV

The collaboration
JHEP 1501 (2015) 068, 2015

Abstract (data abstract)
CERN-LHC. Searches for heavy long-lived charged particles are performed using a data sample of 19.8 fb$^{-1}$ from proton-proton collisions at a centre-of-mass energy of $\sqrt{s}$ = 8 TeV collected by the ATLAS detector at the Large Hadron Collider. No excess is observed above the estimated background and limits are placed on the mass of long-lived particles in various supersymmetric models. Long-lived tau sleptons in models with gauge-mediated symmetry breaking are excluded up to masses between 440 and 385 GeV for $\tan\beta$ between 10 and 50, with a 290 GeV limit in the case where only direct tau slepton production is considered. In the context of simplified LeptoSUSY models, where sleptons are stable and have a mass of 300 GeV, squark and gluino masses are excluded up to a mass of 1500 and 1360 GeV, respectively. Directly produced charginos, in simplified models where they are nearly degenerate to the lightest neutralino, are excluded up to a mass of 620 GeV. $R$-hadrons, composites containing a gluino, bottom squark or top squark, are excluded up to a mass of 1270, 845 and 900 GeV, respectively, using the full detector; and up to a mass of 1260, 835 and 870 GeV using an approach disregarding information from the muon spectrometer.

• #### Table 1

Data from Figure 2a

10.17182/hepdata.66462.v1/t1

Observed data, background estimate and expected signal in the slepton search for the lower of the two masses ($m$) in...

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Data from Figure 2b

10.17182/hepdata.66462.v1/t2

Observed data, background estimate and expected signal in the slepton search for the lower of the two masses ($m$) in...

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Data from Figure 2c

10.17182/hepdata.66462.v1/t3

Observed data, background estimate and expected signal in the slepton search for the one-candidate signal region (LeptoSUSY: $m_{\tilde q}$ =...

• #### Table 4

Data from Figure 3a

10.17182/hepdata.66462.v1/t4

Reconstructed mass $m_\beta$ in observed data, background estimate and expected signal ($\tilde{\chi}^{\pm}_1$ masses of 400 and 600 GeV) in the...

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Data from Figure 3b

10.17182/hepdata.66462.v1/t5

Reconstructed mass $m_\beta$ in observed data, background estimate and expected signal ($\tilde{\chi}^{\pm}_1$ masses of 400 and 600 GeV) in the...

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Data from Figure 3c

10.17182/hepdata.66462.v1/t6

Reconstructed mass $m_\beta$ in observed data, background estimate and expected signal ($\tilde{\chi}^{\pm}_1$ masses of 400 and 600 GeV) in the...

• #### Table 7

Data from Figure 4a

10.17182/hepdata.66462.v1/t7

Data and background estimates for the reconstructed mass based on time-of-flight, $m_{\beta}$, for combined candidates in the full-detector 500 GeV...

• #### Table 8

Data from Figure 4b

10.17182/hepdata.66462.v1/t8

Data and background estimates for the reconstructed mass based on specific energy loss, $m_{\beta\gamma}$, for combined candidates in the full-detector...

• #### Table 9

Data from Figure 4c

10.17182/hepdata.66462.v1/t9

Data and background estimates for the reconstructed mass based on time-of-flight, $m_{\beta}$, for the MS-agnostic 500 GeV sbottom and $m_{\beta\gamma}$...

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Data from Figure 4d

10.17182/hepdata.66462.v1/t10

Data and background estimates for the reconstructed mass based on specific energy loss, $m_{\beta\gamma}$, for the MS-agnostic 500 GeV stop...

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Data from Figure 5a

10.17182/hepdata.66462.v1/t11

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Data from Figure 5c

10.17182/hepdata.66462.v1/t13

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Data from Figure 5e

10.17182/hepdata.66462.v1/t15

• #### Table 43

Data from Aux Table 9

10.17182/hepdata.66462.v1/t43

Muon-agnostic search R-Hadron candidate requirements and example candidate selection flow for ID+calorimeter selection.

• #### Table 44

Data from Aux Table 10

10.17182/hepdata.66462.v1/t44

Full-detector search R-Hadron candidate requirements and example candidate selection flow for combined selection.