Evidence for BCS diquark condensation in the 3+1d lattice NJL model

We present results of numerical simulations of the 3+1d Nambu–Jona-Lasinio model with a non-zero baryon chemical potential μ, with particular emphasis on the superfluid diquark condensate and associated susceptibilities. The results, when extrapolated to the zero diquark source limit, are consistent with the existence of a non-zero BCS condensate at high baryon density. The nature of the infinite volume and zero temperature limits are discussed.