Shinji Takeda

Scaling study of the step scaling function in SU(3) gauge theory with improved gauge actions

We study the scaling behavior of the step scaling function for SU(3) gauge theory, employing the renormalization-group improved Iwasaki gauge action and the perturbatively improved Luscher- Weisz gauge action. We confirm that the step scaling functions from the improved gauge actions agree with that previously obtained from the plaquette action within errors in the continuum limit at both weak and strong coupling regions. We also investigate how different choices of boundary counter terms for the improved gauge actions affect the scaling behavior. In the extrapolation to the continuum limit, we observe that the cut off dependence becomes moderate for the Iwasaki action, if a perturbative reduction of scaling violations is applied to the simulation results. We also measure the low energy scale ratio with the Iwasaki action, and confirm its universality.

Critical endpoint of the finite temperature phase transition for three flavor QCD

We investigate the critical endpoint of finite temperature phase transition of

Tensor renormalization group analysis ofCP(N−1)model

N_f=3

Pseudoscalar meson masses in Wilson chiral perturbation theory for 2 + 1 flavors

QCD at zero chemical potential. We employ the renormalization-group improved Iwasaki gauge action and non-perturbatively

A perturbative determination of O(a) boundary improvement coefficients for the Schrodinger Functional coupling at 1-loop with improved gauge actions

O(a)

Update on Nf=3 finite temperature QCD phase structure with Wilson-Clover fermion action

-improved Wilson-clover fermion action. The critical endpoint is determined by using the intersection point of kurtosis for the temporal size

Critical point phase transition for finite temperature 3-flavor QCD with nonperturbatively O(a) improved Wilson fermions at Nt=10

N_t

Tensor renormalization group analysis of

=4, 6, 8. Spatial sizes of

{\rm CP}(N-1)

N_l

model in two dimensions

=6-16 (