  We propose a search for photoproduction of leptophobic bosons that couple to
quarks at the GlueX experiment at Jefferson Lab. We study in detail a new gauge
boson that couples to baryon number $B$, and estimate that $\gamma p \to p B$
will provide the best sensitivity for $B$ masses above 0.5 GeV. This search
will also provide sensitivity to other proposed dark-sector states that couple
to quarks. Finally, our results motivate a similar search for $B$ boson
electroproduction at the CLAS experiment.
