Lattice QCD Calculation of Flavor Singlet Matrix Elements and N-N Scattering Lengths
Yoshinobu Kuramashi
Abstract
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 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.
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