Our measurement of the fragmentation function in PbPb and pp collsions is submitted to arXiv:1406.0932 and for publication in Physical Review C. This paper is the second PbPb/pp fragmentation function measurement from CMS, and the first paper to observe a significant modification in PbPb collisions when compared to pp. The evolution of this difference is further explored as function of both the the collision centrality, and for the first time, jet momentum.
