Prospects for the measurement of $\text{t}\bar{\text{t}}\text{H}$ production in the opposite-sign dilepton channel at $\sqrt{s}$ = 14 TeV at the High-Luminosity LHC

Prospects for the measurement of top quark-antiquark associated Higgs boson ($\text{t}\bar{\text{t}}\text{H}$) production in the HL-LHC era are presented. The measurement is performed in the opposite sign dilepton channel where $e^{+}e^{-}$, $\mu^{+}\mu^{-}$ and $e^{\pm}\mu^{\pm}$ are considered, while focusing on the $\text{H} \rightarrow \text{b}\bar{\text{b}}$ decay. A novel approach with respect to previous analyses and the projection study for the HL-LHC is explored. The analysis strategy is based on the reconstruction of the Higgs boson invariant mass through the analytical solution of the kinematic equations of the $\text{t}\bar{\text{t}}\text{H}$ system, employs a neural network for the selection of data and makes use of a data-based method to estimate the main backgrounds. The results are extrapolated to the full integrated luminosity expected at the High-Luminosity LHC at $\sqrt{s}=14$ TeV, with the signal strength being expected to be extracted with $^{+0.13}_{-0.12}$ uncertainty.