PoS - Proceedings of Science
Volume 256 - 34th annual International Symposium on Lattice Field Theory (LATTICE2016) - Hadron Spectroscopy and Interactions
Properties of non-local wave function equivalent potential with generalized derivative expansion
T. Sugiura,* K. Murano, N. Ishii, M. Oka
*corresponding author
Full text: pdf
Pre-published on: December 27, 2016
Published on: March 24, 2017
Abstract
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.
DOI: https://doi.org/10.22323/1.256.0122
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