Publications (71)
Pion form factors in the epsilon regime
JLQCD Collaboration, H. Fukaya, S. Aoki +6
We consider how to extract the pion form factors in the epsilon regime. Using the correlators with non-zero momenta and taking appropriate ratios of them, we eliminate the dominant…
Non-perturbative renormalization factors of bilinear quark operators for Kogut-Susskind fermions and light quark masses in quenched QCD
JLQCD Collaboration, S. Aoki, M. Fukugita +15
Light quark masses are computed for Kogut-Susskind fermions by evaluating non-perturbatively the renormalization factor for bilinear quark operators. Calculations are carried out i…
The Kaon B-parameter with the Wilson Quark Action using Chiral Ward Identities
JLQCD Collaboration, S. Aoki, M. Fukugita +8
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 . The mixing pro…
Scaling Study of the Two-Flavor Chiral Phase Transition with the Kogut-Susskind Quark Action in Lattice QCD
JLQCD Collaboration, S. Aoki, M. Fukugita +9
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…
Polynomial Hybrid Monte Carlo algorithm for lattice QCD with an odd number of flavors
JLQCD Collaboration, S. Aoki, R. Burkhalter +15
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-Her…
Pion decay constant for the Kogut-Susskind quark action in quenched lattice QCD
JLQCD Collaboration, S. Aoki, M. Fukugita +15
We present a study for the pion decay constant in the quenched approximation to lattice QCD with the Kogut-Susskind (KS) quark action, with the emphasis given to the renorma…
Lattice QCD Calculation of the Kaon B-parameter with the Wilson Quark Action
JLQCD Collaboration, S. Aoki, M. Fukugita +8
The kaon B parameter is calculated in quenched lattice QCD with the Wilson quark action. The mixing problem of the Îs=2 four-quark operators is solved non-perturbatively with full…
Light quark masses from unquenched lattice QCD
JLQCD Collaboration, T. Ishikawa, S. Aoki +14
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 non…
Phase structure of lattice QCD at finite temperature for 2+1 flavors of Kogut-Susskind quarks
JLQCD Collaboration, S. Aoki, M. Fukugita +15
We report on a study of the finite-temperature chiral transition on an lattice for 2+1 flavors of Kogut-Susskind quarks. We find the point of physical quark masses to lie i…
Study of finite volume effects in the non-perturbative determination of $\csw$ with the SF method in full three-flavor lattice QCD
CP-PACS, JLQCD Collaboration, : +16
The non-perturbative $\csw$ determined by the Schrödinger functional (SF) method with the RG-improved gauge action in dynamical QCD shows a finite volume effect when the n…
Mobility edge and locality of the overlap-Dirac operator with and without dynamical overlap fermions
JLQCD Collaboration, N. Yamada, S. Aoki +8
We perform a systematic study of low-lying eigenmodes of with various gauge actions to find the optimal choice for dynamical overlap fermion simulations, with which one may a…
Light hadron spectrum with two flavors of improved dynamical quarks : final results from JLQCD
JLQCD Collaboration, T. Kaneko, S. Aoki +13
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…
Nucleon Decay Matrix Elements from Lattice QCD
JLQCD Collaboration, S. Aoki, M. Fukugita +15
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 calcul…
Decay Amplitude with the Wilson Quark Action in Quenched Lattice QCD
JLQCD Collaboration, S. Aoki, M. Fukugita +8
We present a calculation for the decay amplitude using a quenched simulation of lattice QCD with the Wilson quark action at . The decay amplitude i…
Non-trivial phase structure of QCD with -improved Wilson fermion at zero temperature
JLQCD Collaboration, S. Aoki, R. Burkhalter +15
JLQCD collaboration recently started the QCD simulations with the -improved Wilson fermion action employing an exact fermion algorithm developed for odd number of qua…
Pion mass difference from vacuum polarization
JLQCD Collaboration, E. Shintani, H. Fukaya +5
We calculate the electromagnetic contribution to the pion mass difference, , in the chiral limit through the type vacuum polarization using…
B_K with the Wilson Quark Action: A Non-Perturbative Resolution of Operator Mixing using Chiral Ward Identities
JLQCD Collaboration, S. Aoki, M. Fukugita +9
We propose a non-perturbative method to determine the mixing coefficients of four-quark operators for the Wilson quark action using chiral Ward identities. The method is ap…
Scaling Analysis of Chiral Phase Transition for Two Flavors of Kogut-Susskind Quarks
JLQCD Collaboration, S. Aoki, M. Fukugita +9
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\t…
Continuum Limit of the Heavy-Light Decay Constant with the Quenched Wilson Quark Action
JLQCD Collaboration, S. Aoki, M. Fukugita +9
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…
mixing in quenched lattice QCD
JLQCD Collaboration, S. Aoki, M. Fukugita +13
We present our results of lattice calculations of parameters, which parameterize =2 transition amplitudes together with the leptonic decay constant. Calculations are made…
Exploration of sea quark effects in two-flavor QCD with the O(a)-improved Wilson quark action
JLQCD Collaboration, S. Aoki, R. Burkhalter +15
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 identi…
Two-flavor QCD simulation with exact chiral symmetry
JLQCD Collaboration, S. Aoki, H. Fukaya +11
We perform numerical simulations of lattice QCD with two flavors of dynamical overlap quarks, which have exact chiral symmetry on the lattice. While this fermion discretization is…
Heavy quark expansion parameters from lattice NRQCD
JLQCD Collaboration, S. Aoki, M. Fukugita +12
We present a lattice QCD calculation of the heavy quark expansion parameters and for heavy-light mesons and heavy-light-light baryons. The calculation is carried…
Light meson form factors in N_f=2+1 QCD with dynamical overlap quarks
JLQCD Collaboration, T. Kaneko, S. Aoki +5
We report on our calculation of pion and kaon form factors in three-flavor QCD using the overlap quark action. Gauge ensembles are generated on a 16^3 \times 48 lattice at a lattic…
Differential decay rate for semileptonic decays
JLQCD Collaboration, S. Aoki, R. Burkhalter +15
We present our study on semileptonic decay form factors with NRQCD action for heavy quark from a quenched lattice QCD simulation at =5.9 on a lat…
Two-Flavor Chiral Phase Transition in Lattice QCD with the Kogut-Susskind Quark Action
JLQCD Collaboration, S. Aoki, M. Fukugita +9
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\time…
Finite temperature QCD at fixed Q with overlap fermions
JLQCD Collaboration, Guido Cossu, Sinya Aoki +5
We present some preliminary results of the project on finite temperature QCD with overlap fermions at KEK. We performed a series of simulations to assess the effects of fixing the…
Results for Quenched from JLQCD
JLQCD Collaboration, S. Aoki, M. Fukugita +8
A report is presented on our continued effort to elucidate the continuum limit of using the quenched Kogut-Susskind quark action. By adding to our previous simulations one mo…
Chiral behavior of light meson form factors in 2+1 flavor QCD with exact chiral symmetry
JLQCD Collaboration, T. Kaneko, S. Aoki +6
We present a study of chiral behavior of light meson form factors in QCD with three flavors of overlap quarks. Gauge ensembles are generated at single lattice spacing 0.12 fm with…
Kaon semileptonic form factors in QCD with exact chiral symmetry
JLQCD Collaboration, T. Kaneko, S. Aoki +6
We report on our calculation of the kaon semileptonic form factors in Nf=2+1 lattice QCD. Chiral symmetry is exactly preserved by using the overlap quark action for a straightforwa…
On the axial symmetry at finite temperature
JLQCD Collaboration, Guido Cossu, Hidenori Fukaya +3
We study the anomaly in two-flavor lattice QCD at finite temperature with the Möbius domain-wall Dirac operator. We generate gauge configurations in the temperature range…
B-Bbar mixing in unquenched lattice QCD
JLQCD Collaboration, S. Aoki, M. Fukugita +13
We present an unquenched lattice calculation for the transition amplitude. The calculation, carried out at an inverse lattice spacing = 2.22(4) GeV, incorpora…
Topics in Light Hadron Mass Spectrum in Quenched QCD
JLQCD Collaboration, S. Aoki, M. Fukugita +9
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 fo…
Heavy quark expansion parameters from lattice NRQCD
JLQCD Collaboration, N. Tsutsui, S. Aoki +15
Using the lattice NRQCD action for heavy quark, we calculate the heavy quark expansion parameters and for heavy-light mesons and heavy-light-light baryons. The r…
I=2 Pion Scattering Length with Wilson Fermions
JLQCD Collaboration, S. Aoki, M. Fukugita +15
We present results for I=2 pion scattering length with the Wilson fermions in the quenched approximation. The finite size method presented by Lüscher is employed, and calculations…
B_K with dynamical overlap fermions
JLQCD Collaboration, N. Yamada, S. Aoki +6
We report on a calculation of with two-flavor dynamical overlap fermions on a lattice at fm. The results are compared with the PQChPT prediction…
Chiral behavior of decay form factors in lattice QCD with exact chiral symmetry
JLQCD Collaboration, S. Aoki, G. Cossu +6
We calculate the form factors of the semileptonic decays in three-flavor lattice QCD, and study their chiral behavior as a function of the momentum transfer and the…
Light hadron spectroscopy with two flavors of O(a) improved dynamical quarks
JLQCD Collaboration, S. Aoki, R. Burkhalter +15
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-pertu…
Heavy quark mass dependence of semileptonic form factors for B decays
JLQCD Collaboration, S. Aoki, M. Fukugita +13
We present our study of the dependence of the heavy-to-light semileptonic B decay form factors on the heavy-light meson mass . Simulations are made over a range of the heav…
Light meson electromagnetic form factors from three-flavor lattice QCD with exact chiral symmetry
JLQCD Collaboration, S. Aoki, G. Cossu +5
We study the chiral behavior of the electromagnetic (EM) form factors of pion and kaon in three-flavor lattice QCD. In order to make a direct comparison of the lattice data with ch…
Pion decay constant in quenched QCD with Kogut-Susskind quarks
JLQCD Collaboration, S. Aoki, M. Fukugita +15
We present a non-perturbative calculation for the pion decay constant with quenched Kogut-Susskind quarks. Numerical simulations are carried out at and 6.2 with various o…
The Light Quark Masses with the Wilson Quark Action using Chiral Ward Identities
JLQCD Collaboration, S. Aoki, M. Fukugita +8
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 $β=5.9-…
Analysis of Hadron Propagators with One Thousand Configurations on a Lattice at
JLQCD Collaboration
Statistical properties of effective mass are analyzed. We show from a general ground that effective mass as a function of time should not exhibit long plateaux whatever high statis…
Decay Amplitude in Quenched Lattice QCD
JLQCD Collaboration, S. Aoki, M. Fukugita +8
A new study is reported of a lattice QCD calculation of the decay amplitude with the Wilson quark action in the quenched approximation at . The amplitude…
D meson semileptonic decays in lattice QCD with Moebius domain-wall quarks
JLQCD Collaboration, T. Kaneko, B. Fahy +2
We report on our study of the D meson semileptonic decays in 2+1 flavor lattice QCD. Gauge ensembles are generated at three lattice cutoffs up to 4.5 GeV and with pion masses as lo…
2+1 flavor light hadron spectrum and quark masses with the O(a) improved Wilson-clover quark formalism
JLQCD Collaboration, T. Ishikawa, S. Aoki +14
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 a…
Chiral interpolation in a finite volume
JLQCD Collaboration, H. Fukaya, S. Aoki +6
A simulation of lattice QCD at (or even below) the physical pion mass is feasible on a small lattice size of \sim 2 fm. The results are, however, subject to large finite volume eff…
B^0-\bar{B}^0 mixing with quenched lattice NRQCD
JLQCD Collaboration, N. Yamada, S. Aoki +15
We present our recent results for the B-parameters, which parameterize the ÎB=2 transition amplitudes. Calculations are made in quenched QCD at β=5.7, 5.9, and 6.1, using NRQCD f…
Nucleon strange quark content in 2+1-flavor QCD
JLQCD Collaboration, K. Takeda, S. Aoki +4
We calculate the strange quark content of the nucleon directly from its disconnected three-point function in N_f=2+1 QCD. Chiral symmetry is crucial to avoid a possibly large conta…
JLQCD's dynamical overlap project
JLQCD Collaboration, T. Kaneko, S. Aoki +11
We present an overview of our project of large-scale simulations with dynamical overlap fermions. The first production run in two-flavor QCD is on-going using the Iwasaki gauge act…
Non-perturbative determination of quark masses in quenched lattice QCD with the Kogut-Susskind fermion action
JLQCD Collaboration, S. Aoki, M. Fukugita +15
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-p…
Light hadron spectrum in three-flavor QCD with O(a)-improved Wilson quark action
CP-PACS, JLQCD Collaboration, : +15
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 renormal…
I=2 Pion Scattering Length with the Wilson Fermion
JLQCD Collaboration, S. Aoki, M. Fukugita +14
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 Lüscher's finite si…
An exact algorithm for three-flavor QCD with -improved Wilson fermions
JLQCD Collaboration, S. Aoki, R. Burkhalter +15
We present an exact dynamical QCD simulation algorithm for the -improved Wilson fermion with odd number of flavors. Our algorithm is an extension of the non-Hermitian polynom…
Kaon B parameter from quenched Lattice QCD
JLQCD Collaboration, S. Aoki, M. Fukugita +8
We present results of a large-scale simulation for the Kaon B parameter in quenched lattice QCD with the Kogut-Susskind quark action. Calculating at 1% statistical accu…
Heavy-Light Matrix Elements with the Wilson Quark Action
JLQCD Collaboration
Status report is made of our quenched study of heavy-light matrix elements employing the Wilson quark action for heavy quark. Results obtained up to now with 200 configurations at…
Improvement of algorithms for dynamical overlap fermions
JLQCD Collaboration, Hideo Matsufuru, Hidenori Fukaya +7
We investigate the algorithms for dynamical overlap fermions aiming at improving the performance for large-scale simulations. We look for the best combination of Hybrid Monte Carlo…
An exact Polynomial Hybrid Monte Carlo algorithm for dynamical Kogut-Susskind fermions
JLQCD Collaboration, K-I. Ishikawa, M. Fukugita +10
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 appro…
Toward Precision Measurement of with Quenched Kogut-Susskind Quarks
JLQCD Collaboration
We present a status report of our ongoing effort toward a precision determination of the kaon parameter with the Kogut-Susskind quark action in quenched QCD. Results for …
Toward the Continuum Limit of with the Quenched Kogut-Susskind Quark Action
JLQCD Collaboration, S. Aoki, M. Fukugita +9
We present new results of our ongoing project toward a precision determination of the kaon parameter with the Kogut-Susskind quark action in quenched QCD. New results taken at…
Form Factors with NRQCD Heavy Quark and Clover Light Quark Actions
JLQCD Collaboration, S. Aoki, M. Fukugita +15
We report results on semileptonic decay form factors near using NRQCD heavy quark and clover light quark actions and currents improved through $O(α…
B meson B-parameters and the decay constant in two-flavor dynamical QCD
JLQCD Collaboration, N. Yamada, S. Aoki +15
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…
Axial U(1) symmetry at finite temperature with Möbius domain-wall fermions
JLQCD Collaboration, Guido Cossu, Hidenori Fukaya +4
We investigate the axial symmetry restoration at finite temperature in two flavor QCD. We employ the Möbius domain-wall formalism that is designed to achieve good chiral sy…
Scaling behavior of with NRQCD
JLQCD Collaboration, K-I. Ishikawa, N. Yamada +16
We investigate the scaling behavior of the meson decay constant and at , employing the NRQCD heavy quark action and the clover light qua…
Kaon semileptonic decay form factors in two-flavor QCD
JLQCD Collaboration, N. Tsutsui, S. Aoki +12
We present a calculation of the kaon form factors in two-flavor QCD with the non-perturbatively -improved Wilson quark action. In order to achieve a few percent accuracy in t…
B meson leptonic decay constant with quenched lattice NRQCD
JLQCD Collaboration, K-I. Ishikawa, N. Yamada +16
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…
Hadron matrix elements for nucleon decay with the Wilson quark action
JLQCD Collaboration, N. Tsutsui, S. Aoki +15
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 Theor…
Chiral behavior of kaon semileptonic form factors in lattice QCD with exact chiral symmetry
JLQCD Collaboration, T. Kaneko, S. Aoki +6
We calculate the kaon semileptonic form factors in lattice QCD with three flavors of dynamical overlap quarks. Gauge ensembles are generated at pion masses as low as 290 MeV and at…
Lattice study of meson correlators in the epsilon-regime of two-flavor QCD
JLQCD Collaboration, H. Fukaya, S. Aoki +7
We calculate mesonic two-point functions in the epsilon-regime of two-flavor QCD on the lattice with exact chiral symmetry. We use gauge configurations of size 16^3 32 at the latti…
Nucleon strange quark content from N_f=2+1 lattice QCD with exact chiral symmetry
JLQCD Collaboration, H. Ohki, K. Takeda +6
We calculate the strange quark content of the nucleon in 2+1-flavor lattice QCD. Chirally symmetric overlap fermion formulation is used to avoid the contamination from up and down…
Light hadron spectroscopy with two flavors of -improved dynamical quarks
JLQCD Collaboration, S. Aoki, R. Burkhalter +14
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 plaque…