### Kaon-Nucleon potential from lattice QCDKaon-Nucleon potential from lattice QCD

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 Author Ikeda, Y. ♦ Aoki, S. ♦ Doi, T. ♦ Hatsuda, T. ♦ Inoue, T. ♦ Ishii, N. ♦ Murano, K. ♦ Nemura, H. ♦ Sasaki, K. Source arXiv.org Content type Text File Format PDF Date of Submission 2010-02-11 Language English ♦ German
 Subject Domain (in DDC) Computer science, information & general works ♦ Natural sciences & mathematics ♦ Physics Subject Keyword High Energy Physics - Lattice ♦ physics:hep-lat Abstract We study the KN interactions in the I(J^{\pi})=0(1/2^-) and 1(1/2^-) channels and associated exotic state \Theta^+ from 2+1 flavor full lattice QCD simulation for relatively heavy quark mass corresponding to m_{\pi}=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. Educational Use Research Learning Resource Type Article