ATLAS $b$-jet identification performance and efficiency measurement with $t\bar{t}$ events in $pp$ collisions at $\sqrt{s}=13$ TeV

@inproceedings{Collaboration2019ATLASI,
  title={ATLAS \$b\$-jet identification performance and efficiency measurement with \$t\bar\{t\}\$ events in \$pp\$ collisions at \$\sqrt\{s\}=13\$ TeV},
  author={Atlas Collaboration},
  year={2019}
}
The algorithms used by the ATLAS Collaboration during Run 2 of the Large Hadron Collider to identify jets containing b-hadrons are presented. The performance of the algorithms is evaluated in the simulation and the efficiency with which these algorithms identify jets containing b-hadrons is measured in collision data. The measurement uses a likelihood-based method in a sample of highly enriched in tt̄ events. The topology of the t → Wb decays is exploited to simultaneously measure both the jet… Expand
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