The charm of the proton: using forward Z+c production to study intrinsic charm at LHCb

While the proton is typically considered to be composed of three quarks at the valance level, current experimental limits also allow for a percent-level contribution from valance-like charm quarks (intrinsic charm). The production of Z bosons in association with charm jets in the forward region provides a direct probe of the charm content of the proton. We will present results from a recent analysis of forward Z+c production at LHCb, which show strong hints of an intrinsic charm component.