[Submitted on 29 Mar 2017]
Properties of non-local wave function equivalent potential with generalized derivative expansion
Takuya Sugiura🇯🇵 · Keiko Murano🇯🇵 · Noriyoshi Ishii🇯🇵 · Makoto Oka🇯🇵
We examine the properties of the wave-function-equivalent potentials which HAL QCD collaboration has introduced. We generalize the derivative expansion, and then apply it to energy-independent and non-local potentials in a coupled-channel model. We observe that the expansion converges by comparing the scattering phase shifts computed from these potentials with the exact one. We have also found that the convergence can be improved by either varying the choice of interpolating fields or tuning the expansion scale in the generalized derivative expansion. The results will be utilized in future lattice QCD calculations, allowing for further application of the HAL QCD method.
- Comments:
- Talk presented at the 34th annual International Symposium on Lattice Field Theory (LATTICE 2016), 24-30 July 2016, University of Southampton, UK, 7 pages, 8 figures
- Subjects:
- Nuclear Theory (nucl-th); High Energy Physics — Lattice (hep-lat)
- arXiv:
- 1703.09936 [pdf]