We evaluate energy levels of the K-pi system in the K* channel in finite volume using chiral unitary theory. We use these energy levels to obtain K-pi phase shifts, and then obtain the K* mass and its decay width. We investigate their dependence on the pion mass and compare this with Lattice QCD calculations. We also compare our method with the standard Luscher approach, and solve the inverse problem to obtain the K-pi phase shifts from these "synthetic" lattice data.
@article{arxiv.1409.0178,
title = {K-pi interaction in finite volume and the K* resonance},
author = {Dan Zhou and Er-Liang Cui and Hua-Xing Chen and Li-Sheng Geng and Li-Hua Zhu},
journal= {arXiv preprint arXiv:1409.0178},
year = {2015}
}