arXiv:1012.3812·v2·High Energy Physics — Lattice
Evidence for a Bound H-dibaryon from Lattice QCD
S.R. Beane🇨🇭 · E. Chang🇪🇸 · W. Detmold🇺🇸 · B. Joo🇺🇸 · H.W. Lin🇺🇸 · T.C. Luu🇺🇸 · K. Orginos🇺🇸 · A. Parreno🇪🇸 · M.J. Savage🇺🇸 · A. Torok🇺🇸 · A. Walker-Loud (NPLQCD Collaboration)🇺🇸
Abstract
We present evidence for the existence of a bound H-dibaryon, an I=0, J=0, s=-2 state with valence quark structure uuddss, at a pion mass of m_pi ~ 389 MeV. Using the results of Lattice QCD calculations performed on four ensembles of anisotropic clover gauge-field configurations, with spatial extents of L ~ 2.0, 2.5, 3.0 and 3.9 fm at a spatial lattice spacing of b ~ 0.123 fm, we find an H-dibaryon bound by B = 16.6 +- 2.1 +- 4.6 MeV at a pion mass of m_pi ~ 389 MeV.
Comments: 4 pages and 3 figures. v2 accepted by PRL