Yusuke Taniguchi

ρ meson decay in 2+1 flavor lattice QCD

(PACS-CS Collaboration) 1 Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan 2 Center for Computational Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan 3 Department of Physics, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, Japan 4 RIKEN Advanced Institute for Computational Science, Kobe, Hyogo 650-0047, Japan 5 Kobayashi-Maskawa Institute for the Origin of Particles and the Universe, Nagoya University, Nagoya, Aichi 464-8602, Japan (Dated: November 28, 2011)

Kaon B-parameter from quenched domain-wall QCD

We present numerical results for the kaon B-parameter, B{sub K}, determined in the quenched approximation of lattice QCD. Our simulations are performed using domain-wall fermions and the renormalization group improved, DBW2 gauge action which combine to give quarks with good chiral symmetry at finite lattice spacing. Operators are renormalized nonperturbatively using the RI/MOM scheme. We study scaling by performing the simulation on two different lattices with a{sup -1}=1.982(30) and 2.914(54) GeV. We combine this quenched scaling study with an earlier calculation of B{sub K} using two flavors of dynamical, domain-wall quarks at a single lattice spacing to obtain B{sub K}{sup MSNDR}({mu}=2 GeV)=0.563(21)(39)(30), were the first error is statistical, the second systematic (without quenching errors) and the third estimates the error due to quenching.

Equation of state in finite-temperature QCD with two flavors of improved Wilson quarks

We present the results of a first study of the equation of state in finite-temperature QCD with two flavors of Wilson-type quarks. The simulations are made on lattices with a temporal size

Two dimensional Script N = (2,2) super Yang-Mills theory on the lattice via dimensional reduction

{N}_{t}=4

Charm quark system at the physical point of 2+1 flavor lattice QCD

and 6, using a renormalization-group-improved action for the gluon sector and a mean-field-improved clover action for the quark sector. The lines of constant physics corresponding to fixed values of the ratio

Spectral function and excited states in lattice QCD with the maximum entropy method

{m}_{\mathrm{PS}}{/m}_{\mathrm{V}}

1+1+1 flavor QCD + QED simulation at the physical point

of the pseudoscalar to vector meson masses at zero temperature are determined, and the beta functions which describe the renormalization-group flow along these lines are calculated. Using these results, the energy density and the pressure are calculated as functions of temperature along the lines of constant physics in the range

I=2 pion scattering phase shift with Wilson fermions

{m}_{\mathrm{PS}}{/m}_{\mathrm{V}}=0.65\char21{}0.95.

Perturbative renormalization factors of bilinear quark operators for improved gluon and quark actions in lattice QCD

The quark mass dependence in the equation of state is found to be small for

Thermodynamics of SU(3) gauge theory on anisotropic lattices

{m}_{\mathrm{PS}}{/m}_{\mathrm{V}}\ensuremath{\lesssim}0.8.