Flavor structure of the baryon-baryon interaction from lattice QCD
Abstract
We investigate baryon-baryon (BB) interactions in the 3-flavor full QCD simulations with degenerate quark masses for all flavors. The BB potentials in the orbital S-wave are extracted from the Nambu-Bethe-Salpeter wave functions measured on the lattice. We observe strong flavor-spin dependences of the BB potentials at short distances. In particular, a strong repulsive core exists in the flavor-octet and spin-singlet channel(the 8_s representation), while an attractive core appears in the flavor singlet channel (the 1 representation). We discuss the relation of such flavor-spin dependence with the Pauli exclusion principle at the quark level. The possible existence of an H-dibaryon resonance above the Lambda-Lambda threshold is also discussed.
Keywords
Cite
@article{arxiv.1011.1695,
title = {Flavor structure of the baryon-baryon interaction from lattice QCD},
author = {Takashi Inoue and for HAL QCD Collaboration},
journal= {arXiv preprint arXiv:1011.1695},
year = {2010}
}
Comments
7 pages, 4 figures, Talk given at the XXVIII International Symposium on Lattice Field Theory (Lattice 2010), Villasimius, Italy, 14-19 Jun 2010