To bind or not to bind: The H-dibaryon in light of chiral effective field theory

Haidenbauer, J.; Meißner, U.-G.

doi:10.1016/j.physletb.2011.10.070

Journal Article

PreJuSER-18454

To bind or not to bind: The H-dibaryon in light of chiral effective field theory

Haidenbauer, J.FZJ* ; Meißner, U.-G.FZJ*

2011
North-Holland Publ. Amsterdam

Physics letters / B 706, 100 - 105 (2011) [10.1016/j.physletb.2011.10.070]

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Please use a persistent id in citations: http://hdl.handle.net/2128/10264 doi:10.1016/j.physletb.2011.10.070

Abstract: We analyze the quark mass dependence of the binding energy of the H-dibaryon in the framework of chiral effective field theory. We show that the SU(3) breaking effects induced by the differences of the pertinent two-baryon thresholds (Lambda Lambda, Xi N, Sigma Sigma) have a very pronounced impact that need to be incorporated properly in future lattice QCD simulations. We also point out that if the H-dibaryon is a two-baryon bound state, its dominant component is EN rather than AA, which is a consequence of the approximate SU(3) flavor symmetry of the two-baryon interactions. (C) 2011 Elsevier B.V. All rights reserved.

Keyword(s): effective field theory: chiral ; quark: mass dependence ; binding energy ; baryon baryon: bound state ; symmetry breaking: SU(3) ; quantum chromodynamics ; lattice ; baryon baryon: potential ; effective Lagrangian ; pi: mass ; hyperon: mass ; partial wave ; phase shift ; numerical calculations ; Hyperon-hyperon interaction (auto) ; Lattice QCD (auto) ; Effective field theory (auto)

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Note: We would like to thank S.R. Beane, A. Gal, and M.J.. Savage for their constructive comments. This work is supported by the Helmholtz Association by funds provided to the virtual institute "Spin and Strong QCD" (VH-VI-231), by the EU - Research Infrastructure Integrating Activity "Study of Strongly Interacting Matter" (HadronPhysics2, grant No. 227431) under the Seventh Framework Program of the EU, and by the DFG (SFB/TR 16 "Subnuclear Structure of Matter").; 8 pages, 2 figures/ Results updated to the new H binding energy reported by NPLQCD, conclusions remain unchanged, several references added; 8 pages, 2 figures/ Results updated to the new H binding energy reported by NPLQCD, conclusions remain unchanged, several references added

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