We present recent results from PbPb collisions recorded by CMS with novel probes that have the potential to help better understand the properties of the quark-gluon plasma (QGP). First evidence of the prompt production of the exotic X(3872) state will be discussed. Its interaction with QGP can provide constraints on the nature of the state, with implications on the coalescence or recombination mechanisms. Large radius jets, with radius parameter up to 1.0, have also been used for the first time as a probe in heavy-ion collisions. In contrast with smaller radius jets, the medium response is much more important and prominent. We also show the first evidence of the top quark in nucleus-nucleus collisions. The use of top quarks as probes opens many future perspectives, including constraints on nPDFs and on the time structure of the QGP.
Michelangelo Mangano, Monica Pepe-Altarelli and Guillaume Unal.