Correlation between $\Upsilon$(nS) meson and the underlying event in pp collisions

We will present the measurement studying the relationship between the production of hard and soft particles through the correlation of Upsilon meson states (including $\Upsilon$(1S), $\Upsilon$(2S), and $\Upsilon$(3S)) with the inclusive-charged particle yields. The analysis is performed using the full-luminosity ATLAS Run-2 13 TeV pp collision data. A description of the technical challenges and solutions associated with a heavy-ion style analysis in high-pileup pp data will be shown. Per-event charged particle multiplicity is found to be smaller in association with excited $\Upsilon$ states compared to that with a ground state at low $\Upsilon$ transverse momentum. The physics implications will be discussed.