Search for H dibaryon on the lattice

Details Search for H dibaryon on the lattice Search for H dibaryon on the lattice

2011-06-10

arxiv.org/abs/1106.1945v6

Phys.Rev.D84:034502,2011

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, 5 figures, Accepted for publication in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.84.034502

We investigate the H-dibaryon, an $I(J^{P})=0(0^{+})$ with $s=-2$, in the chiral and continuum regimes on anisotropic lattices in quenched QCD. Simulations are performed on very coarse lattices with refined techniques to obtain results with high accuracy over a spatial lattice spacing in the range of $a_{s} \sim 0.19 - 0.41$ fm. We present results for the energy difference between the ground state energy of the hexa-quark stranglet and the free two-baryon state from our ensembles. A negative binding energy observed in the chirally extrapolated results leads to the conclusion that the measured hexa-quark state is bound. This is further confirmed by the attractive interaction in the continuum limit with the observed H-dibaryon bound by $\sim 47$ MeV.

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