arXiv:1504.01717·v1·High Energy Physics — Lattice
Coupled channel approach to strangeness S = -2 baryon-bayron interactions in Lattice QCD
Kenji Sasaki · Sinya Aoki · Takumi Doi · Tetsuo Hatsuda · Yoichi Ikeda · Takashi Inoue · Noriyoshi Ishii · Keiko Murano · (HAL QCD Collaboration)
Abstract
The baryon-baryon interactions with strangeness S = -2 with the flavor SU(3) breaking are calculated for the first time by using the HAL QCD method extended to coupled channel system in lattice QCD. The potential matrices are extracted from the Nambu-Bethe-Salpeter wave functions obtained by the 2+1 flavor gauge configurations of CP-PACS/JLQCD Collaborations with a physical volume of 1.93 fm cubed and with m_pi/m_K = 0.96, 0.90, 0.86. The spatial structure and the quark mass dependence of the potential matrix in the baryon basis and in the SU(3) basis are investigated.
Comments: 17 pages, 15 figures