Bulk transitions of twelve flavor QCD and $U_A(1)$ symmetry
  We present an update on our ongoing study on the nature of the bulk transition observed at strong coupling in the SU(3) gauge theory with N_f = 12 flavors in the fundamental representation. We show evidence that there is a first order chiral symmetry breaking bulk transition separating a region at weak coupling where chiral symmetry is restored from a region at strong coupling where chiral symmetry is broken. We also discuss hints of a separate partial restoration of U_A(1) at weaker coupling. The results are in agreement with restoration of conformality in non abelian gauge theories as the number of flavors is increased. 
Albert Deuzeman, Maria Paola Lombardo, Tiago Nunes da Silva and   Elisabetta Pallante
hep-lat hep-ph