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arXiv · 1002.2309

Kaon-Nucleon potential from lattice QCD

Y. Ikeda·S. Aoki·T. Doi·T. Hatsuda·T. Inoue·N. Ishii·K. Murano·H. Nemura·K. Sasaki
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Abstract

We study the KN interactions in the I(J^π)=0(1/2^-) and 1(1/2^-) channels and associated exotic state Θ^+ from 2+1 flavor full lattice QCD simulation for relatively heavy quark mass corresponding to m_π=871 MeV. The s-wave KN potentials are obtained from the Bethe-Salpeter wave function by using the method recently developed by HAL QCD (Hadrons to Atomic nuclei from Lattice QCD) Collaboration. Potentials in both channels reveal short range repulsions: Strength of the repulsion is stronger in the I=1 potential, which is consistent with the prediction of the Tomozawa-Weinberg term. The I=0 potential is found to have attractive well at mid range. From these potentials, the $KN$ scattering phase shifts are calculated and compared with the experimental data.

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Y. Ikeda, S. Aoki, T. Doi, T. Hatsuda, T. Inoue, N. Ishii, K. Murano, H. Nemura, K. Sasaki. 2010-03-03. Kaon-Nucleon potential from lattice QCD. https://doi.org/10.1051/epjconf%2F20100303007

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