Phase structure of thermal lattice QCD with N_f=2 twisted mass Wilson fermions

Understand

We present numerical results for the phase diagram of lattice QCD at finite temperature in the formulation with twisted mass Wilson fermions and a tree-level Symanzik-improved gauge action.

• Our simulations are performed on lattices with temporal extent N_\tau=8, and lattice coupling \beta ranging from strong coupling to the scaling domain.
• Covering a wide range in the space spanned by the lattice coupling \beta and the hopping and twisted mass parameters \kappa and \mu, respectively, we obtain a comprehensive picture of the rich phase structure of the lattice theory.
• In particular, we verify the existence of an Aoki phase in the strong coupling region and the realisation of the Sharpe-Singleton scenario at intermediate couplings.