H. Mino

Hadron scattering lengths in lattice QCD

Lattice QCD calculation of s-wave hadron scattering lengths in the channels \pi-\pi, \pi-N, K-N, {\bar K}-N and N-N is carried out in the quenched QCD at

Scaling study of the two-flavor chiral phase transition with the Kogut-Susskind quark action in lattice QCD

\beta=6/g^2=5.7

Finite-size effect for hadron masses in lattice QCD

. A variant of the method of wall sourceis developed for this purpose, which reduces the computer time by a factor L^3 on an L^3xT lattice compared to the conventional point source method and avoids the Fierz mixing problem. A version of the method in which gauge configurations are not fixed to any gauge can be extended to calculate disconnected quark loop con- tributions in hadron two- and three-point functions. An analytical estimate of statistical errors for this method is worked out, and the magnitude of errors without and with gauge fixing is compared for the case of \pi-\pi four-point functions calculated with the KS quark action. For \pi-\pi scattering both I=0 and 2 scattering lengths are evaluated using the KS and Wilson quark actions on a 12^3x20 lattice. For the same size of lattice, \pi-N, K-N and {\bar K}-N scattering lenghts are calculated with the Wilson quark action. For the \pi-\pi and \pi-N cases simulation results are consistent with the predictions of current algebra and PCAC within one to two standard deviations up to quite heavy quark masses corresponding to

Exploratory Study of Nucleon-Nucleon Scattering Lengths in Lattice QCD

m_\pi/m_\rho\approx 0.74

Manifestation of Sea Quark Effects in the Strong Coupling Constant in Lattice QCD

, while for the K-N and {\bar K}-N cases the agreement is within a factor of two. For N-N scat- tering simulations with the Wilson action on a 20^4 lattice with heavy quarks with

Topological susceptibility in lattice QCD with dynamical quarks

m_\pi/m_\rho\approx 0.74-0.95

Continuum limit of the heavy - light decay constant with the quenched Wilson quark action.

, where the deuteron is expected to become unbound from a phenomenological study with one-boson exchange potentials, show that the nucleon-nucleon force is attractive for both spin triplet and singlet channels, and that the scattering lengths are substantially larger compared to those for the \pi-\pi and \pi-N cases even for such heavy quarks.

BK with the Wilson quark action: A non-perturbative resolution of operator mixing using chiral ward identities

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

Pion decay constant in full lattice QCD

N_t=4

Heavy-light matrix elements with the Wilson quark action

temporal size. Hybrid R simulations of