Evidence for a Bound H-dibaryon from Lattice QCD

2010/12/31 by S. R. Beane, E. Chang, W. Detmold +8 · 1 citation
Physics and Astronomy · #hep-lat #hep-ph #nucl-th

paper · pdf · doi:10.1103/physrevlett.106.162001

published as Phys.Rev.Lett.106:162001,2011 · 4 pages and 3 figures. v2 accepted by PRL

arxiv created 2011/04/22 · arxiv updated 2011/05/09

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.

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