11th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions

Bottomonia, the heaviest known mesons, represent major probes of strongly interacting matter properties. In the context of nuclear collisions, the binding energies separating the $\Upsilon$(nS) states (n=1, 2, or 3) offer an experimental handle to characterize the medium formed. In this talk, we study the modification of the production of the three $\Upsilon$ mesons in both pPb and PbPb collisions with the latest measurements carried out with the CMS detector. The results are compared with model calculations in order to interpret the data.