Showing papers by "Noriyoshi Ishii published in 2012"
TL;DR: In this paper, the Nambu-Bethe-Salpeter wave function was used to extract non-local hadron-hadron potential and phase shift in the S 0 1 channel.
186 citations
TL;DR: In this article, a bound H-dibaryon in the SU ( 3 ) limit is found in the flavor-singlet J P = 0 + channel with the binding energy of about 26 MeV for the lightest quark mass M ps = 469 MeV.
173 citations
TL;DR: In this paper, the energy-independent non-local potential in lattice QCD is explained in detail, and several extensions of the method are also discussed, including meson-baryon interactions.
Abstract: We review recent progress of the HAL QCD method which was recently proposed to investigate hadron interactions in lattice QCD. The strategy to extract the energy-independent non-local potential in lattice QCD is explained in detail. The method is applied to study nucleon-nucleon, nucleon-hyperon, hyperon-hyperon and meson-baryon interactions. Several extensions of the method are also discussed.
69 citations
TL;DR: Theoretical Research Division, Nishina Center, RIKEN, Wako 351-0198, Japan 6 Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551, Japan 7 Nihon University, College of Bioresource Sciences, Fujisawa 252-0880, Japan 8 Department of physics, Tohoku University, Sendai 980-8578, Japan
Abstract: 1Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba 305-8571, Japan 2Center for Computational Sciences, University of Tsukuba, Tsukuba 305-8577, Japan 3Department of Physics, The University of Tokyo, Tokyo 113-0033, Japan 4IPMU, The University of Tokyo, Kashiwa 277-8583, Japan 5Theoretical Research Division, Nishina Center, RIKEN, Wako 351-0198, Japan 6Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551, Japan 7Nihon University, College of Bioresource Sciences, Fujisawa 252-0880, Japan 8Department of Physics, Tohoku University, Sendai 980-8578, Japan
69 citations
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TL;DR: In this paper, the energy-independent non-local potential in lattice QCD is explained in detail, and several extensions of the method are also discussed, including meson-baryon interactions.
Abstract: We review recent progress of the HAL QCD method which was recently proposed to investigate hadron interactions in lattice QCD. The strategy to extract the energy-independent non-local potential in lattice QCD is explained in detail. The method is applied to study nucleon-nucleon, nucleon-hyperon, hyperon-hyperon and meson-baryon interactions. Several extensions of the method are also discussed.
64 citations
TL;DR: The PACS-CS Collaboration as discussed by the authors was the first effort to realize lattice quantum chromodynamics (QCD) calculations at the physical point, i.e., those with quark masses set at physical values.
Abstract: We review the work of the PACS-CS Collaboration, which aimed to realize lattice quantum
chromodynamics (QCD) calculations at the physical point, i.e., those with quark masses set
at physical values. This has been a long-term goal of lattice QCD simulation since its inception
in 1979. After reviewing the algorithmic progress, which played a key role in this development,
we summarize the simulations that explored the quark mass dependence of hadron masses down
to values close to the physical point. In addition to allowing a reliable determination of the light
hadron mass spectrum, this work provided clues on the validity range of chiral perturbation theory,
which is widely used in phenomenology.We then describe the application of the technique of
quark determinant reweighting, which enables lattice QCD calculations exactly on the physical
point. The physical quark masses and the strong coupling constants are fundamental constants
of the strong interaction. We describe a non-perturbative Schrodinger functional approach to
figure out the non-perturbative renormalization needed to calculate them. There are a number of
physical applications that can benefit from lattice QCD calculations carried out either near or at
the physical point. We take up three illustrative examples: calculation of the physical properties
of the ρ meson as a resonance, the electromagnetic form factor and charge radius of the pion,
and charmed meson spectroscopy. Bringing single hadron properties under control opens up a
number of new areas for serious lattice QCD research. One such area is electromagnetic effects
in hadronic properties.We discuss the combined QCD plus QED simulation strategy and present
results on electromagnetic mass difference. Another area is multi-hadron states, or nuclei. We
discuss the motivations and difficulties in this area, and describe our work for deuteron and
helium as our initial playground. We conclude with a brief discussion on the future perspective
of lattice QCD.
7 citations
01 Jan 2012
TL;DR: In this paper, the results of the AV18.2+1 flavor QCD results of nuclear forces are reanalyzed by using a recently developed method which has a remarkable advantage that it can calculate nuclear forces without relying on the ground state saturation of Nambu-Bethe-Salpeter wave functions.
Abstract: 2+1 flavor QCD results of nuclear forces are reanalyzed by using a recently developed method which has a remarkable advantage that it can calculate nuclear forces without relying on the ground state saturation of Nambu-Bethe-Salpeter wave functions. Resulting potentials are parametrized by fit functions which mimic the functional form of AV18. These potentials are used to calculate the scattering phases.