https://doi.org/10.1051/epjconf/20100303007
Kaon-Nucleon potential from lattice QCD
1
Depertment of Physics, The University of Tokyo,
Tokyo
113-0033,
Japan.
2
Nishina Center for Accelerator-Based Science, Institute for
Physical and Cemical Research (RIKEN), Wako,
Saitama
351-0198,
Japan
3
Depertment of Pure and Applied Sciences, The University of
Tsukuba, Tsukuba, Ibaraki
305-8577,
Japan
4
Depertment of Physics, Tohoku University,
Sendai,
Miyagi
980-8578,
Japan
a e-mail: yikeda@nt.phys.s.u-tokyo.ac.jp
We study the K N interactions in the I(Jπ) = 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 mπ = 871 MeV. The s-wave K N 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 K N scattering phase shifts are calculated and compared with the experimental data.
© Owned by the authors, published by EDP Sciences, 2010