Lattice QCD with 12 Degenerate Quark Flavors

Understand

We report on new data from additional zero temperature simulations of QCD with 12 flavors.

• This is a continuation of previous studies using the DBW2 gauge action and naive staggered fermions.
• With the use of the force gradient integrator and a multiple-quark-mass preconditioned HMC, we have done simulations with input quark masses from $m_q=0.003$ to $m_q=0.008$.
• We have observed a metastable, first order, bulk transition that occurs at small input quark masses.