New results for exotic quarkonia and heavy flavour with ATLAS

The measurements of production and properties of heavy flavoured hadrons can be used to probe our understanding of quantum chromodynamics and to search for physics beyond the Standard Model. This paper summarises three recent results from the ATLAS experiment at the Large Hadron Collider. It includes search for an exotic state $X$(5568) in the $B_s^0\pi^\pm$ final state, measurement of quarkonia production in $p\text{Pb}$ and $pp$ collisions and angular analysis of the rare decay $B^0 \to K^*\mu^+\mu^-$.