We report N* masses in the spin-3 2 sector from a highly-improved anisotropic action. States with both positive and negative parity are isolated via a parity projection method. The extent to which spin projection is needed is examined. The gross …
We study relativistic charmonium on very fine quenched lattices (β = 6.4 and 6.6). We concentrate on the calculation of the hyperfine splitting between ηc and J/ψ, aiming for a controlled continuum extrapolation of this quantity. Results for the ηc …
Responses to chemical potential of the pseudoscalar meson screening mass and the chiral condensate in lattice QCD are investigated. On a 16 × 82 × 4 lattice with two flavors of staggered quarks the first and second responses below and above Tc are …
We report a project to provide a set of free source codes for lattice QCD. The programs may be used as fundamental blocks when one wants to construct his/her own QCD codes. They are written in Fortran 90 with use of MODULE, so that algorithms can …
Using the Nambu-Jona-Lasinio (NJL) model we study responses of the pion and kaon masses to changes in the chemical potential, ∂m/∂μ, at zero and finite chemical potential. We find that the behavior of ∂m/∂μ for the pion is quite different from that …
We present a framework to compute the responses of hadron masses to the chemical potential in lattice QCD simulations. As a first trial, the screening mass of the pseudoscalar meson and its first and second responses are evaluated. We present results …
The CLAS program at Jefferson Lab will focus on the low-lying odd-parity spin-1/2 and 3/2 baryon resonances of the nucleon. These baryons offer an interesting forum for investigating QCD and model predictions. Lattice QCD investigations of the …
We improve our previous QCD sum rule calculation on g KN Λ and g KN Σ coupling constants by including the contributions from higher dimensional condensates,and, in the OPE. It is found that the contribution of these condensates is non-negligible …
In this work we report on a new QCD sum rule analysis to predict masses of the excited baryon states (e.g. Σ (1620) and Λ (1405)) by using multiquark interpolating fields ((q¯q)(qqq)). For the Σ (1620) we consider the ¯KN, πΣ, and πΛ (I = 1) …