PRESENT CONSTRAINTS ON THE H-DIBARYON AT THE PHYSICAL POINT FROM LATTICE QCD

Author:

,BEANE S. R.12,CHANG E.3,DETMOLD W.45,JOÓ B.5,LIN H.-W.6,LUU T. C.7,ORGINOS K.45,PARREÑO A.3,SAVAGE M. J.6,TOROK A.8,WALKER-LOUD A.9

Affiliation:

1. Albert Einstein Zentrum für Fundamentale Physik, Institut für theoretische Physik, Sidlerstrasse 5, CH-3012 Bern, Switzerland

2. Department of Physics, University of New Hampshire, Durham, NH 03824-3568, USA

3. Departament d'Estructura i Constituents de la Matèria and Institut de Ciències del Cosmos, Universitat de Barcelona, Martí i Franquès 1, E08028, Spain

4. Department of Physics, College of William and Mary, Williamsburg, VA 23187-8795, USA

5. Jefferson Laboratory, 12000 Jefferson Avenue, Newport News, VA 23606, USA

6. Department of Physics, University of Washington, Box 351560, Seattle, WA 98195, USA

7. N Division, Lawrence Livermore National Laboratory, Livermore, CA 94551, USA

8. Department of Physics, Indiana University, Bloomington, IN 47405, USA

9. Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA

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.

Publisher

World Scientific Pub Co Pte Lt

Subject

General Physics and Astronomy,Astronomy and Astrophysics,Nuclear and High Energy Physics

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