T. Takaishi

The Deconfinement phase transition in one flavor QCD

We present a study of the deconfinement phase transition of one-flavour QCD, using the multiboson algorithm. The mass of the Wilson fermions relevant for this study is moderately large and the non-hermitian multiboson method is a superior simulation algorithm. Finite size scaling is studied on lattices of size 8 3 ×4, 12 3 ×4 and 16 3 ×4. The behaviours of the peak of the Polyakov loop susceptibility, the deconfinement ratio and the distribution of the norm of the Polyakov loop are all characteristic of a first-order phase transition for heavy quarks. As the quark mass decreases, the first-order transition gets weaker and turns into a crossover. To investigate finite size scaling on larger spatial lattices we use an effective action in the same universality class as QCD. This effective action is constructed by replacing the fermionic determinant with the Polyakov loop identified as the most relevant Z(3) symmetry breaking term. Higher-order effects are incorporated in an effective Z(3)-breaking field, h, which couples to the Polyakov loop. Finite size scaling determines the value of h where the first order transition ends. Our analysis at the end - point, hep, indicates that the effective model and thus QCD is consistent with the universality class of the

Responses of hadrons to the chemical potential at finite temperature

We present a framework to compute the responses of hadron masses to the chemical potential in lattice QCD simulations. As a first trial, the screening mass of the pseudoscalar meson and its first and second responses are evaluated. We present results on a

SIMULATION OF SU(2) DYNAMICAL FERMIONS AT FINITE CHEMICAL POTENTIAL AND AT FINITE TEMPERATURE

16times 8^2times 4

The 3-states Potts model as a heavy quark finite density laboratory

lattice with two flavors of staggered quarks below and above

Phase structure of one-flavour QCD

T_c

Thermodynamics of one flavor QCD

. The responses to both the isoscalar and isovector chemical potentials are obtained. They show different behavior in the low and the high temperature phases, which may be explained as a consequence of chiral symmetry breaking and restoration, respectively.

THE STRUCTURE IN MESONIC CHANNELS ABOVE TC

SU(2) lattice gauge theory with dynamical fermion at non-zero chemical potential and at finite temperature is studied. We focus on the influence of chemical potential for quark condensate and mass of pseudoscalar meson at finite temperature. Hybrid Monte Carlo simulations with

有限温度でのハドロン質量に対する化学ポテンシャルの2次の応答(熱場の量子論とその応用,研究会報告)

N_f=8

N_f=2格子QCDによる有限温度におけるハドロン質量の化学ポテンシャル応答の研究(熱場の量子論とその応用,研究会報告)

staggered fermions are carried out on

Finite Temperature Hadron Physics on the Lattice (熱湯の量子論とその応用)

12 times 12times 24 times 4