https://doi.org/10.1051/epjconf/201817505019
Comparison of different source calculations in two-nucleon channel at large quark mass
1
Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
2
Center for Computational Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
3
RIKEN Advanced Institute for Computational Science, Kobe, Hyogo 650-0047, Japan
4
Department of Physics, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, Japan
* Speaker, e-mail: yamazaki@het.ph.tsukuba.ac.jp
Published online: 26 March 2018
We investigate a systematic error coming from higher excited state contributions in the energy shift of light nucleus in the two-nucleon channel by comparing two different source calculations with the exponential and wall sources. Since it is hard to obtain a clear signal of the wall source correlation function in a plateau region, we employ a large quark mass as the pion mass is 0.8 GeV in quenched QCD. We discuss the systematic error in the spin-triplet channel of the two-nucleon system, and the volume dependence of the energy shift.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
