Difficulties in Probing Nuclear Physics: A Study of $^{44}$Ti and   $^{56}$Ni
  The nucleosynthetic yield from a supernova explosion depends upon a variety of effects: progenitor evolution, explosion process, details of the nuclear network, and nuclear rates. Especially in studies of integrated stellar yields, simplifications reduce these uncertainties. But nature is much more complex, and to actually study nuclear rates, we will have to understand the full, complex set of processes involved in nucleosynthesis. Here we discuss a few of these complexities and detail how the NuGrid collaboration will address them. 
Aimee Hungerford (1,2), Christopher L. Fryer (1,2), Francis X. Timmes   (1,3), Patrick Young (1,3), Michael Bennett (1,4), S...