arXiv subjects

Yoshinobu Kuramashi

Publications and source records attributed to Yoshinobu Kuramashi.

110 records · Page 7Linked to original sources

arXiv1997

Nucleon Spin Structures from Lattice QCD: Flavor Singlet Axial and Tensor Charges

The flavor singlet axial and tensor charges of the nucleon are calculated in lattice QCD. We find $ΔΣ=Δu+Δd+Δs=+0.638(54)-0.347(46)-0.109(30) = +0.18(10)$ for the axial charge and $δΣ=δu+δd+δs=+0.839(60)-0.231(55)-0.046(34) = +0.562(88)$ for the tensor charge. The result for the axial charge shows reasonable agreement with the experiment and that for the tensor charge is the first prediction from lattice QCD before experimental measurements.

hep-lat↗

arXiv1995

Lattice QCD Calculation of Flavor Singlet Matrix Elements and N-N Scattering Lengths

We report on our recent study of flavor singlet matrix elements calculated with the wall source method without gauge fixing. Results are presented for the mass difference between $η^{\prime}$ and pseudoscalar octet mesons, the $π$-N $σ$ term and the proton axial vector matrix elements. An exploratory calculation of the N-N scattering lengths is also discussed including a phenomenological study with one-boson exchange potentials.

hep-lat↗