Comparison of different source calculations in two-nucleon channel at large quark mass
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: firstname.lastname@example.org
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
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