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The shrinking of the bottomonium spectral function towards narrowquasi-particle states in a cooling strong-interaction medium at finite baryondensity is followed within a holographic bottom-up model. The 5-dimensionalEinstein-dilaton-Maxwell background is adjusted to lattice-QCD results of soundvelocity and susceptibilities. The zero-temperature bottomonium spectralfunction is adjusted to experimental $\Upsilon$ ground-state mass and firstradial excitations. At baryo-chemical potential $\mu_B = 0$, these two pillarslet emerge the narrow quasi-particle state of the $\Upsilon$ ground state at atemperature of about 150 MeV. Excited states are consecutively formed at lowertemperatures by about 10 (20) MeV for the $2S$ ($3S$) vector states. The baryondensity, i.e. $\mu_B > 0$, pulls that formation pattern to lower temperatures.At $\mu_B =$ 200 MeV, we find a shift by about 15 MeV.

Holographic bottomonium formation in a cooling strong-interaction medium at finite baryon density