Another issue.

benchmarks/b0_tracker/scripts/b0_tracker_hits.cxx

@@ -75,7 +75,7 @@ void b0_tracker_hits(const char* fname = "./sim_output/sim_forward_protons.root"
     return result;
   };
 
-  auto d1 = d0.Define("nhits", nhits, {"B0TrackerHits"})
+  auto d1 = d0.Define("nhits", hits_theta, {"B0TrackerHits"})
 			  .Define("xy_hit_pos", local_position, {"B0TrackerHits"})
               .Define("x_pos", x_pos, {"xy_hit_pos"})
               .Define("y_pos", y_pos, {"xy_hit_pos"});