  The factorization of short-distance partonic cross-sections from universal
long-distance kinematic distributions is fundamental to phenomenology at hadron
colliders. It has been predicted however that observables sensitive to momenta
transverse to the direction of an energetic parton cannot be factorized in the
usual way, even at high energies. It should be possible to study this
factorization breaking using Z+jet production in high-energy proton-proton
collisions by studying azimuthal correlations between a Z boson and associated
charged hadrons. A plan to perform this measurement with data collected by LHCb
will be discussed, along with related work.
