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Search for heavy long-lived charged $R$-hadrons with the ATLAS detector in 3.2 fb$^{-1}$ of proton--proton collision data at $\sqrt{s} = 13$ TeV

The collaboration
Phys.Lett. B760 (2016) 647-665, 2016

Abstract (data abstract)
CERN-LHC. A search for heavy long-lived charged $R$-hadrons is reported using a data sample corresponding to 3.2$^{-1}$ of proton--proton collisions at $\sqrt{s} = 13$ TeV collected by the ATLAS experiment at the Large Hadron Collider at CERN. The search is based on observables related to large ionisation losses and slow propagation velocities, which are signatures of heavy charged particles travelling significantly slower than the speed of light. No significant deviations from the expected background are observed. Upper limits at 95% confidence level are provided on the production cross section of long-lived $R$-hadrons in the mass range from 600 GeV to 2000 GeV and gluino, bottom and top squark masses are excluded up to 1580 GeV, 805 GeV and 890 GeV, respectively.

• Table 1

Data from Figure 2

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Distributions of beta for data and simulation after a Zmumu selection. The values given for the mean and width are...

• Table 2

Data from Figure 3a

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Data (black dots) and background estimates (red solid line) for m_beta for the gluino R-hadron search (1000 GeV). The green...

• Table 3

Data from Figure 3b

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Data (black dots) and background estimates (red solid line) for m_betagamma for the gluino R-hadron search (1000 GeV). The green...

• Table 4

Data from Figure 4

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Data (bold boxes) and background estimates (colour fill) for m_beta vs. m_betagamma for the gluino R-hadron search (1000 GeV). The...

• Table 5

Data from Figure 5a

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Expected (dashed black line) and observed (solid red line) 95% CL upper limits on the cross section as a function...

• Table 6

Data from Figure 5b

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Expected (dashed black line) and observed (solid red line) 95% CL upper limits on the cross section as a function...

• Table 7

Data from Figure 5c

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Expected (dashed black line) and observed (solid red line) 95% CL upper limits on the cross section as a function...

• Table 8

Data from Table 1

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Final selection requirements as a function of the simulated R-hadron mass.

• Table 9

Data from Table 2

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Summary of all studied systematic uncertainties. Ranges indicate a dependency on the R-hadron mass hypothesis (from low to high masses).

• Table 10

Data from Table 3

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Expected signal yield (Nsig) and efficiency (eff.), estimated background (Nbkg) and observed number of events in data (Nobs) for the...

• Table 11

Data from Figure 1a auxiliary

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Distribution of the truth-level beta for gluino R-hadrons in exemplary signal MC samples and muons in a Zmumu MC sample....

• Table 12

Data from Figure 1b auxiliary

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Distribution of the truth-level betagamma for gluino R-hadrons in exemplary signal MC samples and muons in a Zmumu MC sample....

• Table 13

Data from Figure 2 auxiliary

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Expected (dashed black line) and observed (solid red line) 95% confidence level upper limits on the cross section as a...

• Table 14

Data from Figure 3 auxiliary

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Expected (dashed black line) and observed (solid red line) 95% confidence level upper limits on the cross section as a...

• Table 15

Data from Figure 4 auxiliary

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Expected (dashed black line) and observed (solid red line) 95% confidence level upper limits on the cross section as a...

• Table 16

Data from Table 1 auxiliary

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Object-quality selection cut-flow with observed data and exemplary expected events (scaled to 3.2/fb for MC) in the gluino R-hadron search.

• Table 17

Data from Table 2 auxiliary

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Object-quality selection cut-flow with observed data and exemplary expected events (scaled to 3.2/fb for MC) in the squark R-hadron search.

• Table 18

Data from Table 3 auxiliary

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Expected signal yield (Nsig) and efficiency (eff.), estimated background (Nbkg) and observed number of events in data (Nobs) for the...