Anomaly Matching in Gauge Theories at Finite Matter Density
  We investigate the application of 't Hooft's anomaly matching conditions to gauge theories at finite matter density. We show that the matching conditions constrain the low-energy quasiparticle spectrum associated with possible realizations of global symmetries. 
S.D. Hsu (Oregon Univ.), F. Sannino (Yale Univ.), M. Schwetz (Boston   Univ.)