Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2012-03-27
PoS(Lattice 2011)066
Physics
High Energy Physics
High Energy Physics - Lattice
7 pages, 13 figures, 2 tables. Contribution to the XXIX International Symposium on Lattice Field Theory, July 10-16, 2011, Squ
Scientific paper
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. As the quark mass increases, this first order bulk transition ends at a second order critical point, and, for still heavier quark masses, becomes the cross-over we have previously reported. We present measurements of hadron masses, decay constants and other low energy observables in the small quark mass region on the weak coupling side of the bulk transition. Our results show that the behavior of the system is still consistent with spontaneously broken chiral symmetry. We also discuss a preliminary investigation into the behavior of the bulk transition itself. We have found that, as the system approaches the second order critical end point, the scalar singlet meson becomes lighter. Thus it appears that the critical endpoint corresponds to a continuum limit theory only involving scalars and, following known triviality arguments, this is likely a free field theory. The presence of this critical endpoint could influence scaling of lattice observables in the conventional continuum limit.
Jin Xiao-Yong
Mawhinney Robert D.
No associations
LandOfFree
Lattice QCD with 12 Degenerate Quark Flavors does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Lattice QCD with 12 Degenerate Quark Flavors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lattice QCD with 12 Degenerate Quark Flavors will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-638909