Studies of $b$-tagging performance and jet substructure in a high $p_\rm{T}$ $g\rightarrow b\bar{b}$ rich sample of large-$R$ jets from $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector

This note summarizes studies of $b$-tagging performance and the modelling of jet properties in high $p_{\rm T}$, double $b$-tagged, large-$R$ jets from $\sqrt{s} = 8 TeV$ $pp$ collisions collected by the ATLAS detector at the Large Hadron Collider. The double $b$-tag requirement yields a sample rich in jets originating from the $g\rightarrow b\bar{b}$ process. Using this sample, the performance of $b$-tagging at small $b$-quark angular separations is probed, and the modeling of jet properties, including substructure variables, is examined. Good agreement between data and Monte Carlo simulation is found within the experimental uncertainties.