Physical Point Simulation in 2+1 Flavor Lattice QCD (2009)
Ishizuka, N., Izubuchi, T., Kadoh, D., Kanaya, K., ...
We present the results of the physical point simulation in 2+1 flavor lattice QCD with the nonperturbatively $O(a)$-improved Wilson quark action and the Iwasaki gauge action at $\beta=1.9$ on a $32^3...
Derivation of L\"uscher's finite size formula for $N\pi$ and $NN$ system (2009)
I present derivation of L\"uscher's finite size formula for the elastic $N\pi$ and the $NN$ scattering system for several angular momenta from the relativistic quantum field theory.
Aoki, S., Ishikawa, K. I., Ishizuka, N., Izubuchi, T., Kadoh, D., Kanaya, K., ...
We present an evaluation of the running coupling constant for Nf=2+1 QCD. The Schroedinger functional scheme is used as the intermediate scheme to carry out non-perturbative running from the low...
Ishizuka, N., Izubuchi, T., Kadoh, D., Kanaya, K., Kuramashi, Y., ...
We investigate the quark mass dependence of baryon masses in 2+1 flavor lattice QCD using SU(3) heavy baryon chiral perturbation theory up to one-loop order. The baryon mass data used for the...
Charm quark system in 2+1 flavor lattice QCD using the PACS-CS configurations (2008)
Aoki, S., Kadoh, D., Ishii, N., Ishizuka, N., ...
We study heavy-heavy and heavy-light quark systems for charm with a relativistic heavy quark action in 2+1 flavor lattice QCD. Configurations are generated by the PACS-CS Collaboration at the lattice...
Aoki, S., Ishii, N., Ishizuka, N., Izubuchi, T., ...
We investigate the quark mass dependence of meson and baryon masses obtained from 2+1 flavor dynamical quark simulations performed by the PACS-CS Collaboration. With the use of SU(2) and SU(3) chiral...
2+1 flavor lattice QCD simulation with $O(a)$-improved Wilson quarks (2008)
Aoki, S., Ishii, N., Ishizuka, N., Izubuchi, T., ...
We present simulation details and results for the light hadron spectrum in N f = 2 + 1 lattice QCD with the nonperturbatively O(a)-improved Wilson quark action and the Iwasaki gauge action....
2+1 Flavor Lattice QCD toward the Physical Point (2008)
Ishizuka, N., Izubuchi, T., Kadoh, D., Kanaya, K., ...
We present the first results of the PACS-CS project which aims to simulate 2+1 flavor lattice QCD on the physical point with the nonperturbatively $O(a)$-improved Wilson quark action and the Iwasaki...
H. B. Barlow. Unsupervised learning. Neural Computation, 1:295–311, 1989. (2008)
D. H. Ackley, G. E. Hinton, D. G. Amaral, N. Ishizuka, B. Claiborne Neurons, R. Durbin, ...
J. Atick and N. Redlich. Towards a theory of early visual processing. Neural
Lattice QCD on the IBM Scalable POWERParallel Systems SP2 (2007)
C. Bernard A, C. Detar B, S. Gottlieb C, J. Hetrick, N. Ishizuka, ...
A 512 node IBM Scalable POWERParallel Systems SP2 was installed at the Cornell Theory Center in October 1994. During the past couple of months we have been porting and optimizing code for carrying...
Light hadron spectrum with 2+1 flavor dynamical $O(a)$-improved Wilson quarks (2007)
Ukita, PACS-CS Collaboration:N., Aoki, S., Ishii, N., Ishizuka, N., Izubuchi, T., ...
We present preliminary results for the light harden spectrum in $N_f=2+1$ lattice QCD obtained with the nonperturbatively $O(a)$-improved Wilson quark action and the Iwasaki gauge action. Simulations...
Aoki, S., Ishii, N., Ishikawa, K. I., Ishizuka, N., Izubuchi, T., ...
We apply chiral perturbation theory to the pseudoscalar meson mass and decay constant data obtained in the PACS-CS Project toward 2+1 flavor lattice QCD simulations with the O(a)-improved Wilson...
Lattice QCD Calculation of the $\rho$ Meson Decay Width (2007)
Fukugita, M., Ishikawa, K-I., Ishizuka, N., Kanaya, K., Kuramashi, Y., ...
We present a lattice QCD calculation of the $\rho$ meson decay width via the $P$-wave scattering phase shift for the I=1 two-pion system. Our calculation uses full QCD gauge configurations for...
Light quark masses from unquenched lattice QCD (2007)
Aoki, S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., ...
We calculate the light meson spectrum and the light quark masses by lattice QCD simulation, treating all light quarks dynamically and employing the Iwasaki gluon action and the nonperturbatively...
Neutron electric dipole moment with external electric field method in lattice QCD (2006)
Shintani, E., Aoki, S., Ishizuka, N., Kanaya, K., Kikukawa, Y., Kuramashi, Y., ...
We discuss a possibility that the Neutron Electric Dipole Moment (NEDM) can be calculated in lattice QCD simulations in the presence of the CP violating $\theta$ term. In this paper we measure the...
Kaon $B$-parameters for Generic $\Delta S=2$ Four-Quark Operators in Quenched Domain Wall QCD (2006)
Aoki, S., Fukugita, M., Ishizuka, N., Iwasaki, Y., Kanaya, K., ...
We present a study of $B$-parameters for generic $\Delta S=2$ four-quark operators in domain wall QCD. Our calculation covers all the $B$-parameters required to study the neutral kaon mixing in the...
2+1 Flavor Lattice QCD with Luescher's Domain-Decomposed HMC Algorithm (2006)
Aoki, S., Ishikawa, T., Ishizuka, N., Kanaya, K., ...
We report on a study of 2+1 flavor lattice QCD with the $O(a)$-improved Wilson quarks on a $16^3\times 32$ lattice at the lattice spacing $1/a\approx 2$GeV employing Luescher's domain-decomposed...
Aoki, S., Fukugita, M., Hashimoto, S., Ishizuka, N., ...
We present a summary of results of the joint CP-PACS and JLQCD project toward a 2+1 flavor full QCD simulation with the O(a)-improved Wilson quark formalism and the Iwasaki gauge action....
Aoki, S., Ishikawa, T., Ishizuka, N., Kanaya, K., Kuramashi, Y., ...
We apply the UV-filtering preconditioner, previously used to improve the Multi-Boson algorithm, to the Polynomial Hybrid Monte Carlo (UV-PHMC) algorithm. The performance test for the algorithm is...
An estimate of the eta and eta-prime meson masses in Nf=2+1 lattice QCD (2006)
Aoki, JLQCD Collaborations: S., Fukugita, M., Ishikawa, T., Ishizuka, N., ...
Masses of the eta and eta-prime mesons are estimated in Nf=2+1 lattice QCD with the non-perturbatively O(a) improved Wilson quark action and the Iwasaki RG-improved gluon action, using CP-PACS/JLQCD...
Calculation of Neutron EDM in quenched and full QCD (2006)
Shintani, E., Aoki, S., Ishizuka, N., Kanaya, K., Kuramashi, Y., Okawa, M., ...
We report on a direct lattice calculation of the neutron EDM(NEDM) using the external electric field method in both quenched and full QCD. In quenched QCD, we use a $24^3\times 32$ lattice at...
$\rho$ meson decay from the lattice (2006)
Fukugita, M., Ishizuka, N., Kanaya, K., Kuramashi, Y., ...
We present preliminary results on the $\rho$ meson decay width estimated from the scattering phase shift of the I=1 two-pion system. The phase shift is calculated by the finite size formula for...
Pion form factors in two-flavor QCD (2005)
Hashimoto, JLQCD Collaboration: S., Aoki, S., Fukugita, M., Ishizuka, N., Iwasaki, Y., ...
We present a calculation of pion electromagnetic and scalar form factors in two-flavor QCD with the non-perturbatively O(a)-improved Wilson fermion. Chiral extrapolation of the corresponding charge...
Kaon semileptonic decay form factors in two-flavor QCD (2005)
Tsutsui, JLQCD Collaboration: N., Aoki, S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., ...
We present a calculation of the kaon form factors in two-flavor QCD with the non-perturbatively $O(a)$-improved Wilson quark action. In order to achieve a few percent accuracy in the study of SU(3)...
Ishikawa, T., Ishizuka, N., Kanaya, K., Kuramashi, Y., ...
We describe our plan to develop a large-scale cluster system with a peak speed of 14.3Tflops for lattice QCD at the Center for Computational Sciences, University of Tsukuba, as a successor to the...
Neutron electric dipole moment on the lattice (2005)
Shintani, Eigo, Aoki, S., Ishizuka, N., Kanaya, K., Kikukawa, Y., Kuramashi, Y., ...
We carry out a feasibility study toward a lattice QCD calculation of the neutron electric dipole moment (NEDM) in the presence of the $\theta$ term using two different approaches. In the first...
Light hadron spectrum and quark masses in 2+1 flavor QCD (2005)
Ishikawa, JLQCD Collaborations: T., Aoki, S., Bär, O., Fukugita, M., Hashimoto, S., ...
CP-PACS and JLQCD collaborations are carrying out a joint project of the 2+1 flavor full QCD simulation. Gauge configurations are generated for the non-perturbatively $O(a)$-improved Wilson quark...
Aoki, JLQCD Collaborations: S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., ...
We perform a nonperturbative determination of the $O(a)$-improvement coefficient $c_{\rm SW}$ and the critical hopping parameter $\kappa_c$ for $N_f$=3, 2, 0 flavor QCD with the RG-improved gauge...
Neutron electric dipole moment from lattice QCD (2005)
Shintani, E., Aoki, S., Ishizuka, N., Kanaya, K., Kikukawa, Y., Kuramashi, Y., ...
We carry out a feasibility study for the lattice QCD calculation of the neutron electric dipole moment (NEDM) in the presence of the $\theta$ term. We develop the strategy to obtain the nucleon EDM...
I=2 Pion Scattering Length from Two-Pion Wave Functions (2005)
Fukugita, M., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., Kanaya, K., ...
We calculate the two-pion wave function in the ground state of the I=2 $S$-wave system and find the interaction range between two pions, which allows us to examine the validity of the necessary...
Light hadron spectrum in 2+1 flavor full QCD by CP-PACS and JLQCD Collaborations (2004)
Ishikawa, T., Aoki, S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., ...
CP-PACS and JLQCD Collaborations are carrying out a joint project of the 2+1 flavor full QCD with the RG-improved gauge action and the non-perturbatively ${\cal O}(a)$-improved Wilson quark action....
A scaling study of the step scaling function of quenched QCD with improved gauge actions (2004)
Aoki, S., Fukugita, M., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
We study the scaling behavior of the step scaling function for SU(3) gauge theory, employing the Iwasaki gauge action and the Luescher-Weisz gauge action. In particular, we test the choice of...
I=2 Pion Scattering Length from Two-Pion Wave Function (2004)
Fukugita, M., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., Kanaya, K., ...
We present a report on a calculation of scattering length for I=2 $S$-wave two-pion system from two-pion wave function. Calculations are made with an RG-improved action for gluons and improved Wilson...
Chiral extrapolations with small sea quark mass data in two-flavor lattice QCD (2004)
Aoki, S., Fukugita, M., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
We present results on the light hadron spectrum and quark mass in two-flavor QCD calculated with small sea quark masses down to $m_{PS}/m_{V}=0.35$. The configurations are generated using the RG...
Aoki, JLQCD Collaboration: S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
Three-flavor QCD simulation with the $O(a)$-improved Wilson fermion action is made employing an exact fermion algorithm developed for odd number of quark flavors. For the plaquette gauge action, an...
Takeda, S., Aoki, S., Fukugita, M., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
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 L\"uscher-Weisz...
Yamada, JLQCD Collaborations: N., Aoki, S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., ...
We perform a non-perturbative determination of the O(a)-improvement coefficient c_SW for the Wilson quark action in three-flavor QCD with the plaquette gauge action. Numerical simulations are carried...
Aoki, S., Burkhalter, R., Fukugita, M., Hashimoto, S., ...
Renormalization constants ($Z$-factors) of vector and axial-vector currents are determined non-perturbatively in quenched QCD for a renormalization group improved gauge action and a tadpole improved...
Light hadron spectroscopy in two-flavor QCD with small sea quark masses (2004)
Aoki, S., Fukugita, M., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
We extend the study of the light hadron spectrum and the quark mass in two-flavor QCD to smaller sea quark mass, corresponding to $m_{PS}/m_{V}=0.60$--0.35. Numerical simulations are carried out...
I=2 $\pi\pi$ Scattering Phase Shift with two Flavors of $O(a)$ Improved Dynamical Quarks (2004)
Aoki, S., Fukugita, M., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
We present a lattice QCD calculation of phase shift including the chiral and continuum extrapolations in two-flavor QCD. The calculation is carried out for I=2 S-wave $\pi\pi$ scattering. The phase...
Lattice QCD calculation of the proton decay matrix element in the continuum limit (2004)
Tsutsui, JLQCD Collaborations: N., Aoki, S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., ...
We present a quenched lattice QCD calculation of the \alpha and \beta parameters of the proton decay matrix element. The simulation is carried out using the Wilson quark action at three values of the...
Non-perturbative calculation of $Z_V$ and $Z_A$ in domain-wall QCD on a finite box (2003)
Fukugita, M., Ishizuka, N., Iwasaki, Y., Kanaya, K., Kaneko, T., ...
We report on a non-perturbative evaluation of the renormalization factors for the vector and axial-vector currents, $Z_V$ and $Z_A$, in the quenched domain-wall QCD (DWQCD) with plaquette and...
Aoki, S., Fukugita, M., Ishizuka, N., Iwasaki, Y., Kanaya, K., ...
Renormalization constants of vector ($Z_V$) and axial-vector ($Z_A$) currents are determined non-perturbatively in quenched QCD for an RG-improved gauge action and a tadpole-improved clover quark...
I=2 Pion Scattering Length from Two-Pion Wave Function (2003)
We present a preliminary report on a calculation of scattering length for I=2 $S$-wave two-pion system directly from the two-pion wave function. Results are compared with those calculated from the...
Aoki, S., Fukugita, M., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
We present a calculation of the scattering phase shift for the I=2 S-wave pion-pion system in the continuum limit with two-flavor full QCD. Calculations are made at three lattice spacings, using the...
Aoki, S., Fukugita, M., Hashimoto, S., Ishizuka, N., ...
The non-perturbative $\csw$ determined by the Schr\"{o}dinger functional (SF) method with the RG-improved gauge action in dynamical $N_f=3$ QCD shows a finite volume effect when the numerical...
Continuum limit of proton decay matrix elements in quenched lattice QCD (2003)
Tsutsui, JLQCD Collaborations: N., Aoki, S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., ...
We present a lattice QCD calculation of the parameters \alpha and \beta which are necessary in the theoretical estimation of the proton lifetime in grand unified theories (GUTs) using chiral...
Light hadron spectrum in three-flavor QCD with O(a)-improved Wilson quark action (2003)
Kaneko, JLQCD Collaboration: T., Aoki, S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., ...
We report on a calculation of the light hadron spectrum and quark masses in three-flavor dynamical QCD using the non-perturbatively O(a)-improved Wilson quark action and a renormalization-group...
B-Bbar mixing in unquenched lattice QCD (2003)
Aoki, JLQCD Collaboration: S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
We present an unquenched lattice calculation for the $B^0-\bar{B}^0$ transition amplitude. The calculation, carried out at an inverse lattice spacing $1/a$ = 2.22(4) GeV, incorporates two flavors of...
Heavy quark expansion parameters from lattice NRQCD (2003)
Aoki, JLQCD Collaboration: S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
We present a lattice QCD calculation of the heavy quark expansion parameters $\mu_{\pi}^2$ and $\mu_G^2$ for heavy-light mesons and heavy-light-light baryons. The calculation is carried out on a...
Two flavors of dynamical quarks on anisotropic lattices (2003)
Aoki, S., Fukugita, M., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
We report on our study of two-flavor full QCD on anisotropic lattices using $O(a)$-improved Wilson quarks coupled with an RG-improved glue. The bare gauge and quark anisotropies corresponding to the...
Light hadron spectroscopy with two flavors of $O(a)$-improved dynamical quarks (2002)
Aoki, JLQCD Collaboration: S., Burkhalter, R., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., ...
We present a high statistics study of the light hadron spectrum and quark masses in QCD with two flavors of dynamical quarks. Numerical simulations are carried out using the plaquette gauge action...
Results for the Etaprime Mass from Two-Flavor Lattice QCD (2002)
Lesk, V. I., Burkhalter, R., Fukugita, M., Ishizuka, N., Iwasaki, Y., ...
We present results for the mass of the etaprime meson for two-flavor lattice QCD in the continuum limit, calculated on the CP-PACS computer, using an RG-improved gauge action and clover fermion...
Flavor Singlet Meson Mass in the Continuum Limit in Two-Flavor Lattice QCD (2002)
Aoki, S., Burkhalter, R., Fukugita, M., Ishizuka, N., ...
We present results for the mass of the eta-prime meson in the continuum limit for two-flavor lattice QCD, calculated on the CP-PACS computer, using a renormalization-group improved gauge action, and...
Non-Perturbative Determination of $c_{\rm SW}$ in Three-flavor Dynamical QCD (2002)
Aoki, JLQCD Collaborations: S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., ...
We present a fully non-perturbative determination of the $O(a)$ improvement coefficient $c_{\rm SW}$ in three-flavor dynamical QCD for the RG improved as well as the plaquette gauge actions, using...
We explore applications of the maximum entropy method (MEM) to determine properties of unstable particles using the four-dimensional O(4) $\phi^4$ theory as a laboratory. The spectral function of the...
I=2 Pion Scattering Phase Shift with Wilson Fermions (2002)
Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
We present a lattice QCD calculation of the scattering phase shift for the I=2 $S$-wave two-pion system using the finite size method proposed by L\"uscher. We work in the quenched approximation...
$K\to \pi\pi$ Decay Amplitude on the Lattice (2002)
Recent theoretical and numerical progresses of the lattice calculations of $K\to\pi\pi$ decay amplitude are reviewed.
Chiral extrapolation of light-light and heavy-light decay constants in unquenched QCD (2002)
Hashimoto, JLQCD Collaboration: S., Aoki, S., Fukugita, M., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
We test the one-loop chiral perturbation theory formula on unquenched lattice data of pseudoscalar meson decay constants. The chiral extrapolation including the effect of the chiral logarithm is...
Exploring QCD at small sea quark masses with improved Wilson-type quarks (2002)
Aoki, S., Fukugita, M., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
We explore the region of small sea quark masses below $m_{PS}/m_V=0.5$ in two-flavor QCD using a mean-field improved clover quark action and an RG-improved gauge action at $a \simeq 0.2$ fm on $12^3...
Study of unstable particle through the spectral function in O(4) $\phi^4$ theory (2002)
We test application of the maximum entropy method to decompose the states contributing to the unstable $\sigma$ correlation function through the spectral function in the four dimensional O(4)...
An exact Polynomial Hybrid Monte Carlo algorithm for dynamical Kogut-Susskind fermions (2002)
Fukugita, M., Hashimoto, S., Ishizuka, N., Iwasaki, Y., Kanaya, K., ...
We present a polynomial Hybrid Monte Carlo (PHMC) algorithm as an exact simulation algorithm with dynamical Kogut-Susskind fermions. The algorithm uses a Hermitian polynomial approximation for the...
Dynamical fermions on anisotropic lattices (2002)
Aoki, S., Fukugita, M., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
We report on our study of two-flavor full QCD on anisotropic lattices using $O(a)$-improved Wilson quarks coupled with an RG-improved glue. The bare gauge and quark anisotropies corresponding to the...
I=2 Pion Scattering Phase Shift with Wilson Fermions (2002)
Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
We present results of phase shift for I=2 $S$-wave $\pi\pi$ system with the Wilson fermions in the quenched approximation. The finite size method proposed by L\"uscher is employed, and calculations...
Kaneko, JLQCD Collaboration: T., Aoki, S., Burkhalter, R., Fukugita, M., Hashimoto, S., Ishikawa, K-I., ...
We present the final results of the JLQCD calculation of the light hadron spectrum and quark masses with two flavors of dynamical quarks using the plaquette gauge action and fully $O(a)$-improved...
An Exact Algorithm for Any-flavor Lattice QCD with Kogut-Susskind Fermion (2002)
Aoki, JLQCD Collaboration: S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
We propose an exact simulation algorithm for lattice QCD with dynamical Kogut-Susskind fermion in which the N_f-flavor fermion operator is defined as the N_f/4-th root of the Kogut-Susskind (KS)...
$B^0-\bar{B}^0$ mixing in quenched lattice QCD (2002)
Aoki, JLQCD Collaboration: S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
We present our results of lattice calculations of $B$ parameters, which parameterize $\Delta B$=2 transition amplitudes together with the leptonic decay constant. Calculations are made in the...
I=2 Pion Scattering Length with the Wilson Fermion (2002)
Aoki, JLQCD Collaboration: S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
The calculation of the I=2 pion scattering length in quenched lattice QCD is revisited. The calculation is carried out with the Wilson fermion action employing L\"uscher's finite size scaling method...
Polynomial Hybrid Monte Carlo algorithm for lattice QCD with an odd number of flavors (2001)
Aoki, JLQCD Collaboration: S., Burkhalter, R., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., ...
We present a polynomial hybrid Monte Carlo (PHMC) algorithm for lattice QCD with odd numbers of flavors of O(a)-improved Wilson quark action. The algorithm makes use of the non-Hermitian Chebyshev...
Charmonium Spectrum from Quenched Anisotropic Lattice QCD (2001)
Aoki, S., Burkhalter, R., Ejiri, S., Fukugita, M., Hashimoto, S., ...
We present a detailed study of the charmonium spectrum using anisotropic lattice QCD. We first derive a tree-level improved clover quark action on the anisotropic lattice for arbitrary quark mass....
Non-perturbative renormalization in domain-wall QCD by Schr\"odinger functional scheme (2001)
Aoki, Y., Ejiri, S., Fukugita, M., Hashimoto, S., Ishizuka, N., ...
We formulate and numerically test the Schr\"odinger functional scheme for domain-wall QCD. We then apply it to a non-perturbative calculation of the renormalization factors for vector and...
Heavy quark expansion parameters from lattice NRQCD (2001)
Tsutsui, JLQCD Collaboration: N., Aoki, S., Burkhalter, R., Fukugita, M., Hashimoto, S., Ishikawa, K-I., ...
Using the lattice NRQCD action for heavy quark, we calculate the heavy quark expansion parameters $\mu_{\pi}^2$ and $\mu_G^2$ for heavy-light mesons and heavy-light-light baryons. The results are...
Exploration of sea quark effects in two-flavor QCD with the O(a)-improved Wilson quark action (2001)
Aoki, JLQCD Collaboration: S., Burkhalter, R., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., ...
We explore sea quark effects in the light hadron mass spectrum in a simulation of two-flavor QCD using the nonperturbatively O(a)-improved Wilson fermion action. In order to identify finite-size...
I=2 Pion Scattering Length and Phase Shift with Wilson Fermions (2001)
Burkhalter, R., Fukugita, M., Hashimoto, S., Ishizuka, N., Iwasaki, Y., ...
We present preliminary results of scattering length and phase shift for I=2 S-wave $\pi\pi$ system with the Wilson fermions in the quenched approximation. The finite size method presented by...
Chiral property of domain-wall fermion from eigenvalues of 4D Wilson-Dirac Operator (2001)
Aoki, Y., Burkhalter, R., Ejiri, S., Fukugita, M., Hashimoto, S., ...
We investigate a chiral property of the domain-wall fermion (DWF) system using the four-dimensional hermitian Wilson-Dirac operator $H_W$. A formula expressing the Ward-Takahashi identity quark mass...
Burkhalter, R., Fukugita, M., Hashimoto, S., Ishizuka, N., Iwasaki, Y., ...
Employing the maximum entropy method we extract the spectral functions from meson correlators at four lattice spacings in quenched QCD with the Wilson quark action. We confirm that the masses and...
Non-perturbative renormalization for a renormalization group improved gauge action (2001)
Burkhalter, R., Fukugita, M., Hashimoto, S., Ide, K., Ishizuka, N., ...
Renormalization constants of vector ($Z_V$) and axial-vector ($Z_A$) currents are determined non-perturbatively in quenched QCD for a renormalization group improved gauge action and a tadpole...
Charmonium spectrum from quenched QCD on anisotropic lattices (2001)
Burkhalter, R., Ejiri, S., Fukugita, M., Hashimoto, S., Ishizuka, N., ...
We present our final results of the charmonium spectrum in quenched QCD on anisotropic lattices. Simulations are made with the plaquette gauge action and a tadpole improved clover quark action...
Aoki, Y., Burkhalter, R., Ejiri, S., Fukugita, M., Hashimoto, S., ...
We present a calculation of the $K\to\pi\pi$ decay amplitudes from the $K\to\pi$ matrix elements using leading order relations derived in chiral perturbation theory. Numerical simulations are carried...
B meson B-parameters and the decay constant in two-flavor dynamical QCD (2001)
Yamada, JLQCD Collaboration: N., Aoki, S., Bulkhalter, R., Fukugita, M., Hashimoto, S., Ishikawa, K-I., ...
We present a two-flavor dynamical QCD calculation of the B meson B parameters and decay constant. We use NRQCD for heavy quark and the nonperturbatively O(a)-improved Wilson action for light quark at...
Aoki, JLQCD Collaboration: S., Burkhalter, R., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., ...
JLQCD collaboration recently started the $N_f=3$ QCD simulations with the $O(a)$-improved Wilson fermion action employing an exact fermion algorithm developed for odd number of quark flavors. It is...
Equation of state for pure SU(3) gauge theory on anisotropic lattices (2001)
Burkhalter, R., Ejiri, S., Fukugita, M., Hashimoto, S., Ishizuka, N., ...
We present results for the equation of state for pure SU(3) gauge theory obtained on anisotropic lattices with the anisotropy $\xi \equiv a_s/a_t = 2$. The pressure and energy density are calculated...
An exact algorithm for three-flavor QCD with $O(a)$-improved Wilson fermions (2001)
Aoki, JLQCD Collaboration: S., Burkhalter, R., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., ...
We present an exact dynamical QCD simulation algorithm for the $O(a)$-improved Wilson fermion with odd number of flavors. Our algorithm is an extension of the non-Hermitian polynomials HMC algorithm...
Aoki, S., Aoki, Y., Burkhalter, R., Ejiri, S., Fukugita, M., ...
We explore application of the domain wall fermion formalism of lattice QCD to calculate the $K\to\pi\pi$ decay amplitudes in terms of the $K\to\pi$ and $K\to 0$ hadronic matrix elements through...
Differential decay rate of $B \to \pi l \nu$ semileptonic decay with lattice NRQCD (2001)
Aoki, JLQCD Collaboration: S., Fukugita, M., Hashimoto, S., Ishizuka, N., Iwasaki, Y., ...
We present a lattice QCD calculation of $B\to \pi l \nu$ semileptonic decay form factors in the small pion recoil momentum region. The calculation is performed on a quenched $16^3 \times 48$ lattice...
Topological Susceptibility in Lattice QCD with Two Flavors of Dynamical Quarks (2001)
Aoki, S., Burkhalter, R., Ejiri, S., Fukugita, M., Hashimoto, S., ...
We present a study of the topological susceptibility in lattice QCD with two degenerate flavors of dynamical quarks. The topological charge is measured on gauge configurations generated with a...
Spectral function and excited states in lattice QCD with maximum entropy method (2001)
Aoki, S., Burkhalter, R., Fukugita, M., Hashimoto, S., Ishizuka, N., ...
We apply the maximum entropy method to extract the spectral functions for pseudoscalar and vector mesons from hadron correlators previously calculated at four different lattice spacings in quenched...
Kaon B parameter from quenched domain-wall QCD (2001)
Aoki, S., Aoki, Y., Burkhalter, R., Ejiri, S., Fukugita, M., ...
We report on a calculation of $B_K$ with domain wall fermion action in quenched QCD. Simulations are made with a renormalization group improved gauge action at $\beta=2.6$ and 2.9 corresponding to...
Light Hadron Spectroscopy with Two Flavors of Dynamical Quarks on the Lattice (2001)
Aoki, S., Boyd, G., Burkhalter, R., Ejiri, S., Fukugita, M., ...
We present results of a numerical calculation of lattice QCD with two degenerate flavors of dynamical quarks, identified with up and down quarks, and with a strange quark treated in the quenched...
Thermodynamics of SU(3) gauge theory on anisotropic lattices (2001)
Collaboration, CP-PACS, Namekawa, Y., Aoki, S., Burkhalter, R., Ejiri, S., Fukugita, M., ...
Finite temperature SU(3) gauge theory is studied on anisotropic lattices using the standard plaquette gauge action. The equation of state is calculated on $16^{3} \times 8$, $20^{3} \times 10$ and...
Equation of state in finite-temperature QCD with two flavors of improved Wilson quarks (2001)
Collaboration, CP-PACS, Khan, A. Ali, Aoki, S., Burkhalter, R., Ejiri, S., Fukugita, M., ...
We present results of a first study of equation of state in finite-temperature QCD with two flavors of Wilson-type quarks. Simulations are made on lattices with temporal size $N_t=4$ and 6, using an...
B meson decay constant from two-flavor lattice QCD with non-relativistic heavy quarks (2001)
Collaboration, CP-PACS, Khan, A. Ali, Aoki, S., Burkhalter, R., Ejiri, S., Fukugita, M., ...
We present a study of leptonic $B$ meson decay constants in lattice QCD with two flavors ($N_f=2$) of light dynamical quarks using NRQCD for the heavy quark. Gauge configurations are generated with a...
Hybrid Quarkonia with Dynamical Sea Quarks (2001)
Khan, A. Ali, Aoki, S., Burkhalter, R., Ejiri, S., Fukugita, M., ...
We present a dynamical lattice calculation with 2 flavours for bottomonium states with an additional gluonic excitation. Using improved actions for the quarks and gauge fields at a lattice spacing of...
Aoki, S., Aoki, Y., Burkhalter, R., Ejiri, S., Fukugita, M., ...
Chiral properties of QCD formulated with the domain-wall fermion (DWQCD) are studied using the anomalous quark mass m_{5q} and the spectrum of the 4-dimensional Wilson-Dirac operator. Numerical...
Quenched charmonium spectrum on anisotropic lattices (2000)
Aoki, S., Burkhalter, R., Ejiri, S., Fukugita, M., Hashimoto, S., ...
We present the results of quenched charmonium spectrum for S- and P-states, obtained by a relativistic heavy quark method on anisotropic lattices. Simulations are carried out using the standard...
Calculation of $K\to \pi$ matrix elements in quenched domain-wall QCD (2000)
Aoki, S., Aoki, Y., Burkhalter, R., Ejiri, S., Fukugita, M., ...
We explore the possibility for an evaluation of non-leptonic $\Delta S=1$ $K$ decay amplitudes through the calculation of $K\to\pi$ matrix elements using domain-wall QCD. The relation between the...
Differential decay rate for $B \to \pi l \nu$ semileptonic decays (2000)
Aoki, JLQCD Collaboration: S., Burkhalter, R., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., ...
We present our study on $B \to \pi l \nu$ semileptonic decay form factors with NRQCD action for heavy quark from a quenched lattice QCD simulation at $\beta$=5.9 on a $16^3\times 48$ lattice. We...
Kaon B parameter from quenched domain-wall QCD (2000)
Aoki, S., Aoki, Y., Burkhalter, R., Ejiri, S., Fukugita, M., ...
We report on a calculation of $B_K$ with domain wall fermion action in quenched QCD. Simulations are made with a renormalization group improved gauge action at $\beta=2.6$ and 2.9 corresponding to...
Light hadron spectroscopy with two flavors of O(a) improved dynamical quarks (2000)
Aoki, JLQCD Collaboration: S., Burkhalter, R., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., ...
We report on our study of light hadron spectrum and quark masses in QCD with two flavors of dynamical quarks. Simulations are made with the plaquette gauge action and the non-perturbatively $O(a)$...
B^0-\bar{B}^0 mixing with quenched lattice NRQCD (2000)
Yamada, JLQCD Collaboration: N., Aoki, S., Burkhalter, R., Fukugita, M., Hashimoto, S., Ishikawa, K-I., ...
We present our recent results for the B-parameters, which parameterize the \Delta B=2 transition amplitudes. Calculations are made in quenched QCD at \beta=5.7, 5.9, and 6.1, using NRQCD for heavy...
Full QCD Light Hadron Spectrum and Quark Masses: Final Results from CP-PACS (2000)
Aoki, S., Boyd, G., Burkhalter, R., Ejiri, S., Fukugita, M., ...
We present the final results of the CP-PACS calculation of the light hadron spectrum and quark masses with two flavors of dynamical quarks. Simulations are made with a renormalization-group improved...
Aoki, S., Burkhalter, R., Ejiri, S., Fukugita, M., Hashimoto, S., ...
We present a calculation of the B and D meson decay constants in lattice QCD with two (Nf=2) flavours of light dynamical quarks, using an O(a)-improved Wilson action for both light and heavy quarks...
Aoki, S., Burkhalter, R., Ejiri, S., Fukugita, M., Hashimoto, S., ...
We study the finite-temperature phase structure and the transition temperature of QCD with two flavors of dynamical quarks on a lattice with the temporal size $N_t=4$, using a renormalization group...
Chiral properties of domain-wall quarks in quenched QCD (2000)
Collaboration, CP-PACS, Khan, A. Ali, Aoki, S., Aoki, Y., Burkhalter, R., Ejiri, S., ...
We investigate the chiral properties of quenched domain-wall QCD (DWQCD) at the lattice spacings $a^{-1} \simeq 1$ and 2 GeV for both plaquette and renormalization-group (RG) improved gauge actions....
Sea Quark Effects on Quarkonia (2000)
Khan, A. Ali, Aoki, S., Burkhalter, R., Ejiri, S., Fukugita, M., ...
We study the effects of two dynamical sea quarks on the spectrum of heavy quarkonia. Within the non-relativistic approach to Lattice QCD we found sizeable changes to the hyperfine splitting, but we...
Dynamical Quark Effects on Light Quark Masses (2000)
Aoki, S., Boyd, G., Burkhalter, R., Ejiri, S., Fukugita, M., ...
We present results for light quark masses from a systematic lattice QCD study with two degenerate flavors of dynamical quarks. Simulations are made with a renormalization-group improved gauge action...
Pion decay constant for the Kogut-Susskind quark action in quenched lattice QCD (1999)
Aoki, JLQCD Collaboration: S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
We present a study for the pion decay constant $f_\pi$ in the quenched approximation to lattice QCD with the Kogut-Susskind (KS) quark action, with the emphasis given to the renormalization problems....
Heavy-light spectrum and decay constant from NRQCD with two flavors of dynamical quarks (1999)
Aoki, S., Burkhalter, R., Ejiri, S., Fukugita, M., Hashimoto, S., ...
We report on a study of B mesons on N_f = 2 full QCD configurations using an RG-improved gauge action, NRQCD heavy quark action and tadpole-improved clover light quark action. Results on the...
$B \to \pi l\bar{\nu}$ Form Factors with NRQCD Heavy Quark and Clover Light Quark Actions (1999)
Aoki, JLQCD Collaboration: S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
We report results on semileptonic $B\to\pi l\bar{\nu}$ decay form factors near $q^2_{\rm max}$ using NRQCD heavy quark and clover light quark actions and currents improved through $O(\alpha a)$. An...
Nucleon Decay Matrix Elements from Lattice QCD (1999)
Aoki, JLQCD Collaboration: S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
We present a model-independent calculation of hadron matrix elements for all dimension-six operators associated with baryon number violating processes using lattice QCD. The calculation is performed...
I=2 Pion Scattering Length with Wilson Fermions (1999)
Aoki, JLQCD Collaboration: S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
We present results for I=2 pion scattering length with the Wilson fermions in the quenched approximation. The finite size method presented by L\"uscher is employed, and calculations are carried out...
Pion decay constant in quenched QCD with Kogut-Susskind quarks (1999)
Aoki, JLQCD Collaboration: S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
We present a non-perturbative calculation for the pion decay constant with quenched Kogut-Susskind quarks. Numerical simulations are carried out at $\beta = 6.0$ and 6.2 with various operators...
Nucleon decay matrix elements with the Wilson quark action: an update (1999)
Aoki, S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
We present preliminary results of a new lattice computation of hadronic matrix elements of baryon number violating operators which appear in the low-energy effective Lagrangian of (SUSY-)Grand...
Heavy Quarkonia from Anisotropic and Isotropic Lattices (1999)
Aoki, S., Burkhalter, R., Ejiri, S., Fukugita, M., Hashimoto, S., ...
We report on recent results for the spectrum of heavy quarkonia. Using coarse and anisotropic lattices we achieved an unprecedented control over statistical and systematic errors for higher excited...
Heavy-light decay constants from relativistic Nf=2,0 QCD (1999)
Aoki, S., Burkhalter, R., Ejiri, S., Fukugita, M., Hashimoto, S., ...
We present results on an analysis of the decay constants fB and fBs with two flavours of sea quark. The calculation has been carried out on 3 different bare gauge couplings and 4 sea quark masses at...
Equation of state for pure SU(3) gauge theory with RG improved action (1999)
Aoki, S., Burkhalter, R., Ejiri, S., Fukugita, M., Hashimoto, S., ...
We present results for the equation of state for pure SU(3) gauge theory obtained with a renormalization-group (RG) improved action. The energy density and pressure are calculated on a $16^3\times 4$...
Equation of state in finite-temperature QCD with improved Wilson quarks (1999)
Aoki, S., Burkhalter, R., Ejiri, S., Fukugita, M., Hashimoto, S., ...
We study finite-temperature phase transition and equation of state for two-flavor QCD at $N_t=4$ using an RG-improved gauge action and a meanfield-improved clover quark action. The pressure is...
Quenched QCD with domain-wall fermions on coarse lattices (1999)
Aoki, S., Aoki, Y., Burkhalter, R., Ejiri, S., Fukugita, M., ...
We investigate the existence of chiral zero modes at a^{-1} \simeq 1 GeV in quenched domain-wall QCD. Simulations are carried out for the plaquette and an RG-improved gauge actions on a 12^3x24xN_s...
Light hadron spectrum and quark masses in QCD with two flavors of dynamical quarks (1999)
Aoki, S., Boyd, G., Burkhalter, R., Ejiri, S., Fukugita, M., ...
We present updated results of the CP-PACS calculation of the light hadron spectrum in $N_{\rm f}=2$ full QCD. Simulations are made with an RG-improved gauge action and a tadpole-improved clover quark...
Aoki, S., Burkhalter, R., Ejiri, S., Fukugita, M., Hashimoto, S., ...
We present results on an analysis of the decay constants f_B and f_Bs with two flavours of sea quark. The calculation has been carried out on 3 different bare gauge couplings and 4 sea quark masses...
Eta meson mass and topology in QCD with two light flavors (1999)
Aoki, S., Burkhalter, R., Ejiri, S., Fukugita, M., Hashimoto, S., ...
We present results for the mass of the flavor singlet meson calculated on two-flavor full QCD configurations generated by the CP-PACS full QCD project. We also investigate topological charge...
B meson leptonic decay constant with quenched lattice NRQCD (1999)
Yamada, N., Aoki, S., Fukugita, M., Hashimoto, S., Ishizuka, N., ...
We present a lattice NRQCD study of the B meson decay constant in the quenched approximation with emphasis given to the scaling behavior. The NRQCD action and the heavy-light axial current we use...
Equation of state for pure SU(3) gauge theory with renormalization group improved action (1999)
Khan, A. Ali, Aoki, S., Burkhalter, R., Ejiri, S., Fukugita, M., ...
A lattice study of the equation of state for pure SU(3) gauge theory using a renormalization-group (RG) improved action is presented. The energy density and pressure are calculated on a $16^3\times...
Boyd, G., Burkhalter, R., Hashimoto, S., Ishizuka, N., Iwasaki, Y., ...
We investigate effects of action improvement on the light hadron spectrum and the static quark potential in two-flavor QCD for $a^{-1} \approx 1$ GeV and $m_{PS}/m_V = 0.7-0.9$. We compare a...
Aoki, JLQCD Collaboration: S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
We report results of quark masses in quenched lattice QCD with the Kogut-Susskind fermion action, employing the Reguralization Independent scheme (RI) of Martinelli et al. to non-perturbatively...
The Kaon B-parameter with the Wilson Quark Action using Chiral Ward Identities (1999)
Aoki, S., Fukugita, M., Hashimoto, S., Ishizuka, N., Iwasaki, Y., Kanaya, K., ...
A lattice QCD calculation of the kaon $B$ parameter $B_K$ is carried out with the Wilson quark action in the quenched approximation at $\beta=6/g^2=5.9-6.5$. The mixing problem of the $\Delta s=2$...
Hybrid Quarkonia on Asymmetric Lattices (1998)
Shanahan, H. P., Khan, A. A., Aoki, S., Burkhalter, R., Ejiri, S., ...
We report on a study of heavy hybrid states using the NRQCD approach on coarse and asymmetric lattices, where we discard vacuum polarisation effects and neglect all spin-correction terms. We find a...
Aoki, S, Fukugita, M, Hashimoto, S, Ishikawa, K I, Ishizuka, N, Iwasaki, Y, ...
Light quark masses are computed for Kogut-Susskind fermions by evaluating non-perturbatively the renormalization factor for bilinear quark operators. Calculations are carried out in the quenched...
Phase structure of lattice QCD at finite temperature for 2+1 flavors of Kogut-Susskind quarks (1998)
Aoki, S, Fukugita, M, Hashimoto, S, Ishikawa, K I, Ishizuka, N, Iwasaki, Y, ...
We report on a study of the finite-temperature chiral transition on an $N_t=4$ lattice for 2+1 flavors of Kogut-Susskind quarks. We find the point of physical quark masses to lie in the region of...
Hadron matrix elements for nucleon decay with the Wilson quark action (1998)
Tsutsui, JLQCD Collaboration: N., Aoki, S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., ...
We report preliminary results of our study of matrix elements of baryon number violating operators which appear in the low-energy effective Lagrangian of (SUSY-)Grand Unified Theories. The...
Scaling behavior of $f_{B}$ with NRQCD (1998)
Yamada, N., Aoki, S., Fukugita, M., Hashimoto, S., Ishizuka, N., ...
We investigate the scaling behavior of the $B$ meson decay constant $f_B$ and $f_{B_{s}}$ at $\beta$$=$$5.7, 5.9, 6.1$, employing the NRQCD heavy quark action and the clover light quark action....
Aoki, JLQCD Collaboration: S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
Light quark masses are computed for Kogut-Susskind fermions by evaluating non-perturbatively the renormalization factor for bilinear quark operators. Calculations are carried out in the quenched...
Phase structure of lattice QCD at finite temperature for 2+1 flavors of Kogut-Susskind quarks (1998)
Aoki, JLQCD Collaboration: S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
We report on a study of the finite-temperature chiral transition on an $N_t=4$ lattice for 2+1 flavors of Kogut-Susskind quarks. We find the point of physical quark masses to lie in the region of...
Heavy-Light Decay Constants: Conclusions from the Wilson Action (1998)
Bernard, MILC Collaboration: C., DeGrand, T., DeTar, C., Gottlieb, Steven, Heller, Urs M., Hetrick, J., ...
We report on the results of a MILC collaboration calculation of $f_B$, $f_{B_s}$, $f_D$, $f_{D_s}$ and their ratios. We discuss the most important errors in more detail than we have elsewhere.
Lattice Determination of Heavy-Light Decay Constants (1998)
Bernard, MILC Collaboration: C., DeGrand, T., DeTar, C., Gottlieb, Steven, Heller, Urs M., Hetrick, J. E., ...
We report on the MILC collaboration's calculation of $f_B$, $f_{B_s}$, $f_D$, $f_{D_s}$, and their ratios. Our central values come from the quenched approximation, but the quenching error is...
$K^{+}\to\pi^{+}\pi^{0}$ Decay Amplitude with the Wilson Quark Action in Quenched Lattice QCD (1997)
Aoki, JLQCD Collaboration: S., Fukugita, M., Hashimoto, S., Ishizuka, N., Iwasaki, Y., Kanaya, K., ...
We present a calculation for the $K^+\to\pi^+ \pi^0 $ decay amplitude using a quenched simulation of lattice QCD with the Wilson quark action at $\beta=6/g^2=6.1$. The decay amplitude is extracted...
B meson decay constant from quenched Lattice QCD (1997)
Aoki, JLQCD Collaboration: S., Fukugita, M., Hashimoto, S., Ishizuka, N., Iwasaki, Y., Kanaya, K., ...
A lattice QCD calculation of the B meson decay constant is presented. In order to investigate the scaling violation associated with the heavy quark, parallel simulations are carried out employing...
B meson decay constant with the Wilson and Clover heavy quark actions (1997)
Aoki, JLQCD Collaboration: S., Fukugita, M., Hashimoto, S., Ishizuka, N., Iwasaki, Y., Kanaya, K., ...
We present results of our quenched study of the B meson decay constant obtained with a parallel set of simulations with the Wilson and Clover actions at \beta=5.9, 6.1 and 6.3. Systematic errors...
Heavy quark mass dependence of semileptonic form factors for B decays (1997)
Aoki, JLQCD Collaboration: S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
We present our study of the dependence of the heavy-to-light semileptonic B decay form factors on the heavy-light meson mass $M_{PS}$. Simulations are made over a range of the heavy quark mass...
The Kaon B-parameter with the Wilson Quark Action using Chiral Ward Identities (1997)
Aoki, JLQCD Collaboration: S., Fukugita, M., Hashimoto, S., Ishizuka, N., Iwasaki, Y., Kanaya, K., ...
We present a detailed description of the method and results of our calculation of the kaon B parameter using the Wilson quark action in quenched QCD at $\beta=5.9-6.5$. The mixing problem of the...
The Light Quark Masses with the Wilson Quark Action using Chiral Ward Identities (1997)
Aoki, JLQCD Collaboration: S., Fukugita, M., Hashimoto, S., Ishizuka, N., Iwasaki, Y., Kanaya, K., ...
We present results for the light quark masses for the Wilson quark action obtained with the PCAC relation for the one-link extended axial vector current in quenched QCD at $\beta=5.9-6.5$. This...
$K^{+}\to\pi^{+}\pi^{0}$ Decay Amplitude in Quenched Lattice QCD (1997)
Aoki, JLQCD Collaboration: S., Fukugita, M., Hashimoto, S., Ishizuka, N., Iwasaki, Y., Kanaya, K., ...
A new study is reported of a lattice QCD calculation of the $K^+\to\pi^+ \pi^0 $ decay amplitude with the Wilson quark action in the quenched approximation at $\beta=6.1$. The amplitude is extracted...
Kaon B parameter from quenched Lattice QCD (1997)
Collaboration, JLQCD, Aoki, S., Fukugita, M., Hashimoto, S., Ishizuka, N., Iwasaki, Y., ...
We present results of a large-scale simulation for the Kaon B parameter $B_K$ in quenched lattice QCD with the Kogut-Susskind quark action. Calculating $B_K$ at 1% statistical accuracy for seven...
Boyd, G., Burkhalter, R., Hashimoto, S., Ishizuka, N., Iwasaki, Y., ...
We present first results from a full QCD calculation on the CP-PACS, comparing various actions at $a^{-1} \sim 1 GeV$ and $m_\pi/m_\rho \approx 0.7$--0.9. We use the plaquette and a renormalization...
CP-PACS results for quenched QCD spectrum with the Wilson action (1997)
Aoki, S., Boyd, G., Burkhalter, R., Hashimoto, S., Ishizuka, N., Iwasaki, Y., ...
We present progress report of a CP-PACS calculation of quenched QCD spectrum with the Wilson quark action. Light hadron masses and meson decay constants are obtained at $\beta=$5.9, 6.1, and 6.25 on...
Two-Flavor Chiral Phase Transition in Lattice QCD with the Kogut-Susskind Quark Action (1997)
Aoki, JLQCD Collaboration: S., Fukugita, M., Hashimoto, S., Ishizuka, N., Iwasaki, Y., Kanaya, K., ...
A summary is presented of a scaling study of the finite-temperature chiral phase transition of two-flavor QCD with the Kogut-Susskind quark action based on simulations on $L^3\times4$ ($L$=8, 12 and...
Aoki, JLQCD Collaboration: S., Fukugita, M., Hashimoto, S., Ishizuka, N., Iwasaki, Y., Kanaya, K., ...
We report on a study of two-flavor finite-temperature chiral phase transition employing the Kogut-Susskind quark action and the plaquette gluon action in lattice QCD for a lattice with $N_t=4$...
Results for Quenched $B_K$ from JLQCD (1997)
Collaboration, JLQCD, Aoki, S., Fukugita, M., Hashimoto, S., Ishizuka, N., Iwasaki, Y., ...
A report is presented on our continued effort to elucidate the continuum limit of $B_K$ using the quenched Kogut-Susskind quark action. By adding to our previous simulations one more point at $\beta...
CP-PACS Result for the Quenched Light Hadron Spectrum (1997)
Boyd, G., Burkhalter, R., Hashimoto, S., Ishizuka, N., Iwasaki, Y., ...
The quenched hadron spectrum in the continuum obtained with the Wilson quark action in recent simulations on the CP-PACS is presented. Results for the light quark masses and the QCD scale parameter...
Full QCD simulation on CP-PACS (1997)
Aoki, S., Boyd, G., Burkhalter, R., Hashimoto, S., Ishizuka, N., Iwasaki, Y., ...
A status report is made of an on-going full QCD study on the CP-PACS aiming at a comparative analysis of the effects of improving gauge and quark actions on hadronic quantities and static quark...
Scaling Analysis of Chiral Phase Transition for Two Flavors of Kogut-Susskind Quarks (1997)
Aoki, JLQCD Collaboration: S., Fukugita, M., Hashimoto, S., Ishizuka, N., Iwasaki, Y., Kanaya, K., ...
Report is made of a systematic scaling study of the finite-temperature chiral phase transition of two-flavor QCD with the Kogut-Susskind quark action based on simulations on $L^3\times4$ ($L$=8, 12...
Lattice QCD Calculation of the Kaon B-parameter with the Wilson Quark Action (1997)
Aoki, JLQCD Collaboration S., Fukugita, M., Hashimoto, S., Ishizuka, N., Iwasaki, Y., Kanaya, K., ...
The kaon B parameter is calculated in quenched lattice QCD with the Wilson quark action. The mixing problem of the \Delta s=2 four-quark operators is solved non-perturbatively with full use of chiral...
Lattice QCD Calculation of the Kaon B-parameter with the Wilson Quark Action (1997)
S. Aoki, M. Fukugita, S. Hashimoto, N. Ishizuka, Y. Iwasaki, K. Kanaya, ...
The kaon B parameter is calculated in quenched lattice QCD with the Wilson quark action. The mixing problem of the \Deltas = 2 four-quark operators is solved non-perturbatively with full use of...
Aoki, JLQCD Collaboration: S., Fukugita, M., Hashimoto, S., Ishizuka, N., Iwasaki, Y., Kanaya, K., ...
We propose a non-perturbative method to determine the mixing coefficients of $\Delta s=2$ four-quark operators for the Wilson quark action using chiral Ward identities. The method is applied to...
Topics in Light Hadron Mass Spectrum in Quenched QCD (1996)
Aoki, JLQCD Collaboration: S., Fukugita, M., Hashimoto, S., Ishizuka, N., Iwasaki, Y., Kanaya, K., ...
Several topics concerning the light hadron spectrum are discussed. Flavor symmetry breaking effects and the problem of quenched chiral logarithm are examined with pion mass data for the...
Continuum Limit of the Heavy-Light Decay Constant with the Quenched Wilson Quark Action (1996)
Aoki, JLQCD Collaboration: S., Fukugita, M., Hashimoto, S., Ishizuka, N., Iwasaki, Y., Kanaya, K., ...
We explore the problems in calculating the decay constant for heavy-light mesons using the quenched Wilson quark action for both heavy and light quarks. We find that the continuum limit of the decay...
Toward the Continuum Limit of $B_K$ with the Quenched Kogut-Susskind Quark Action (1996)
Aoki, JLQCD Collaboration: S., Fukugita, M., Hashimoto, S., Ishizuka, N., Iwasaki, Y., Kanaya, K., ...
We present new results of our ongoing project toward a precision determination of the kaon $B$ parameter with the Kogut-Susskind quark action in quenched QCD. New results taken at $\beta$=6.4 and...
F$_{B}$ quenched and unquenched (1995)
Bernard, C W, Blum, T, De, A, DeGrand, T A, DeTar, C E, Gottlieb, S, ...
Results for f_B, f_{B_s}, f_D, f_{D_s}, and their ratios are presented. High statistics quenched runs at \beta=5.7, 5.85, 6.0, and 6.3, plus a run still in progress at \beta=6.52 make possible a...
$f_B$ quenched and unquenched (1995)
Bernard, C., Blum, T., De, A., DeGrand, T., DeTar, C., Gottlieb, Steven, ...
Results for $f_B$, $f_{B_s}$, $f_D$, $f_{D_s}$, and their ratios are presented. High statistics quenched runs at $\beta=5.7$, $5.85$, $6.0$, and $6.3$, plus a run still in progress at $\beta=6.52$...
Status and prospect for determining $f_B$, $f_{B_s}$, $f_{B_s} / f_B$ on the lattice (1995)
Blum, T., De, A., DeGrand, T., DeTar, C., Gottlieb, Steven, ...
Preliminary results from the MILC collaboration for $f_B$, $f_{B_s}$, $f_D$, $f_{D_s}$ and their ratios are presented. We compute in the quenched approximation at $\beta=6.3$, 6.0 and 5.7 with Wilson...
Preliminary heavy-light decay constants from the MILC collaboration (1994)
Bernard, C., Blum, T., De, A., DeGrand, T., DeTar, C., Gottlieb, Steven, ...
Preliminary results from the MILC collaboration for $f_B$, $f_{B_s}$, $f_D$, $f_{D_s}$ and their ratios are presented. We compute in the quenched approximation at $\beta=6.3$, 6.0 and 5.7 with Wilson...
Charmonium spectroscopy with heavy Kogut-Susskind quarks (1994)
Aoki, S., Fukugita, M., Hashimoto, S., Ishizuka, N., Mino, H., Okawa, M., ...
Charmonium spectroscopy with Kogut-Susskind valence quarks are carried out for quenched QCD at $\beta=6.0$ and for two-flavor full QCD at $\beta=5.7$. Results for 1P--1S mass splitting and estimates...
Manifestation of Sea Quark Effects in the Strong Coupling Constant in Lattice QCD (1994)
Aoki, S., Fukugita, M., Hashimoto, S., Ishizuka, N., Mino, H., Okawa, M., ...
We demonstrate that sea quark effects of a magnitude expected from renormalization group considerations are clearly visible in the strong coupling constant measured in current full QCD simulations....
Finite-Size Effect of Hadron Masses with Kogut-Susskind Quarks (1993)
Aoki, S., Umemura, T., Fukugita, M., Ishizuka, N., Mino, H., Okawa, M, ...
We present numerical results and their analyses of finite-size effects of hadron masses for both quenched and full QCD calculations. We show that they are much larger for full QCD due to dynamical...
Sea Quark Effects on the Strong Coupling Constant (1993)
Onogi, T., Aoki, S., Fukugita, M., Hashimoto, S., Ishizuka, N., Mino, H., ...
We present results showing that the strong coupling constant measured in two-flavor full QCD with dynamical Kogut-Susskind quarks at $\beta=5.7$ exhibit a 15\% increase due to sea quarks over that...
Renormalization factors for bilinear and four-quark operators with the Kogut-Susskind fermion action are perturbatively calculated to one-loop order in the general covariant gauge. Results are...