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. Parreño, M. J. Savage, A. Torok, A. Walker-Loud

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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 π∼389MeV. 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 3.9fm at a spatial lattice spacing of bs∼0.123fm, we find an H dibaryon bound by BzH=16.6±2.1±4.6MeV at a pion mass of mπ∼389MeV.

Original languageEnglish
Article number162001
JournalPhysical Review Letters
Volume106
Issue number16
DOIs
StatePublished - Apr 20 2011
Externally publishedYes

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