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Present Constraints on the H-dibaryon at the Physical Point from Lattice QCD

By S. R. Beane, E. Chang, W. Detmold, B. Joo, H. W. Lin, T. C. Luu, K. Orginos, A. Parreno, M. J. Savage, A. Torok and A. Walker-Loud

Abstract

The current constraints from lattice QCD on the existence of the H-dibaryon are discussed. With only two significant lattice QCD calculations of the H-dibaryon binding energy at approximately the same lattice spacing, the forms of the chiral and continuum extrapolations to the physical point are not determined. In this brief report, we consider the constraints on the H-dibaryon imposed by two simple chiral extrapolations. In both instances, the extrapolation to the physical pion mass allows for a bound H-dibaryon or a near-threshold scattering state. Further lattice QCD calculations are required to clarify this situation.Comment: 8 pages, 2 figures, 1 table; revised for the journa

Topics: High Energy Physics - Lattice, High Energy Physics - Phenomenology, Nuclear Experiment, Nuclear Theory
Year: 2011
DOI identifier: 10.1142/S0217732311036978
OAI identifier: oai:arXiv.org:1103.2821
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