Flavor structure of the baryon-baryon interaction from lattice QCD

2010/11/08 by Inoue, Takashi, Collaboration, for HAL QCD
#FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th)

paper · doi:10.48550/arxiv.1011.1695

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.

Related

• Lattice Nuclear Force
• Spin-Flavor SU(6) Symmetry for Baryon-Baryon Interactions
• Study of H-dibaryon mass in Lattice QCD
• Reexamination of the short-range baryon-baryon potentials in the constituent quark model
• Lattice QCD study of baryon-baryon interactions in the (S,I)=(-2,0) system using the coupled-channel formalism