ATLAS: HL-LHC Upgrades and B-Physics Measurements

The excellent performance of the Large Hadron Collider (LHC) at CERN has successfully pushed the boundaries of particle physics for over two decades. The High-Luminosity LHC is a new major upgrade that will offer a peak instantaneous of up to $7.5 \times 10^{34}$ cm$^{-2}$s$^{-1}$. The upgrade will substantially increase the statistics available to the experiments for advancing the theories of particle physics. The HL-LHC is expected to start operating in 2026 and in twelve years should deliver up to 4000 fb$^{-1}$. The corresponding upgrades of the ATLAS detector regarding the ATLAS beauty physics program are discussed in this paper. As examples, preliminary results on the expected sensitivities for the search for CP-violation in the decay channel $B_s^0 \rightarrow J/\psi \phi$ using the parameters $\Delta\Gamma_s$ and $\phi_s$ are shown, among other selections.