Update on $N_f = 3$ finite temperature QCD phase structure with Wilson-Clover fermions

Abstract

We present an update of the finite temperature phase structure analysis for three flavor QCD. In the study the Iwasaki gauge action and non-perturvatively O(a) improved Wilson-Clover fermion action are employed. We discuss finite size scaling analysis including mixings of magnetizationlike and energy-like observables. Preliminary results are shown of the continuum limit of the critical point using newly generated data at N t = 8, 10, including estimates of the critical pseudoscalar meson mass and critical temperature. 34th annual International Symposium on Lattice Field Theory

QCD at finite temperature and chemical potential from Dyson–Schwinger equations

“…It is currently an open question which of these scenarios is realised in QCD. For the theory with three degenerate flavours, lattice studies seem to support the existence of a first order region in the lower left corner of the Columbia plot [152][153][154][155][156][157][158]. However, the size of the first order region depends strongly on the formulation of the lattice action and the temporal extend of the lattice and has not yet been determined unambiguously.…”

Lattice QCD at nonzero temperature and density

“…Most recently the study has also been performed using improved clover-Wilson fermions [23] on N τ =4, 6, and 8 lattices. The estimate critical pion mass in the continuum limit is reduced from ∼ 300 MeV to ∼ 100 MeV after including the analyses on the new data produced on N τ =10 lattices [26]. Uncertainties arising from the Binder cumulant of the chiral condensate rather than that of a proper order parameter are also discussed in S. Takeda's talk [26].…”

“…m π 50 MeV. Right: Preliminary results on the continuum extrapolation of m c π obtained from simulations using clover-improved Wilson fermions on N τ = 4, 6, 8 and 10 lattices [26]. The critical pion mass in the continuum limit is estimated to be around 100 MeV.…”

Chiral phase structure of three flavor QCD at vanishing baryon number density

“…The first order chiral phase transition in 3-flavor QCD has been investigated on coarse lattices using unimproved [6][7][8][9] as well as improved actions [2,[10][11][12][13][14][15]. However, on these coarse lattices the critical pion mass value turns out to be strongly cut-off and regularization scheme dependent.…”