  The phase diagram of strongly interacting matter is studied within a
three-flavor Nambu--Jona-Lasinio model, which contains the coupling between
chiral and diquark condensates through the axial anomaly. Our results show that
it is essential to include the 2SC phase in the analysis. While this is
expected for realistic strange quark masses, we find that even for equal up,
down, and strange bare quark masses, 2SC pairing can be favored due to
spontaneous flavor-symmetry breaking by the axial anomaly. This can lead to a
rich phase structure, including BCS- and BEC-like 2SC and CFL phases and new
endpoints. On the other hand, the low-temperature critical endpoint, which was
found earlier in the same model without 2SC pairing, is almost removed from the
phase diagram and cannot be reached from the low-density chirally broken phase
without crossing a preceding first-order phase boundary. For physical quark
masses no additional critical endpoint is found.
