  We discuss the impact of heavy-flavor production measurements in
semi-inclusive deep inelastic scattering at HERA on the CTEQ-TEA PDFs. In
particular, we study the impact of the latest charm and bottom production
measurements from the H1 and ZEUS collaborations on the gluon, and the
interplay of these measurements with the data ensemble of the recent CT18
global QCD analysis.

High Energy Physics - Phenomenology