Volume 380 - Particles and Nuclei International Conference 2021 (PANIC2021) - Standard model physics at the TeV scale
Performance and calibration for the identification of boosted Higgs bosons decaying into beauty quark pairs in ATLAS
E. Jones*  on behalf of the ATLAS Collaboration
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Pre-published on: March 03, 2022
Published on:
Abstract
These proceedings present the performance and calibration of the $X\rightarrow b\bar{b}$ tagger, developed by the ATLAS experiment to identify boosted Higgs bosons decaying in the dominant decay channel to a beauty quark-antiquark pair. Data-MC scale factors for the signal efficiency are calculated using $Z\gamma$ and $Z+\text{jets}$ events, in four regions of $p_{\text{T}}$, and vary between $1.45^{+0.47}_{-0.45}$ and $0.55^{+0.23}_{-0.22}$, whilst the mis-tag efficiency scale factors are measured using single-lepton $t\bar{t}$ events, also in four regions of $p_{\text{T}}$, and vary between $1.1\pm0.12$ and $1.0\pm0.16$. The modelling of the large-\textit{R} jet kinematics is evaluated using multijet events enriched in $g\rightarrow b\bar{b}$ splitting, achieved by requiring a non-isolated muon contained inside the large-\textit{R} jet.
DOI: https://doi.org/10.22323/1.380.0403
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