中国物理学会高能物理分会第十一届全国会员代表大会暨学术年会

The unique forward coverage of the LHCb spectrometer allows the valence quark distributions of protons and nuclei to be probed with unprecedented precision. In this high-x region, both the flavour content and structure of the nucleon's parton distribution functions remain relatively poorly known. New LHCb measurements of Z+charm jet production could be indicative of a valence-like intrinsic-charm component in the proton wavefunction, and measurements of Z production in pPb collisions provide new constraints on the partonic structure of nucleons bound inside nuclei. Here we will discuss these new LHCb measurements and comparisons with state-of-the-art parton distribution function calculations.