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Mass of the H dibaryon

By P. Shanahan, A. Thomas and R. Young

Abstract

Recent lattice QCD calculations have reported evidence for the existence of a bound state with strangeness -2 and baryon number 2 at quark masses somewhat higher than the physical values. By developing a description of the dependence of this binding energy on the up, down and strange quark masses that allows a controlled chiral extrapolation, we explore the hypothesis that this state is to be identified with the H dibaryon. Taking as input the recent results of the HAL and NPLQCD Collaborations, we show that the H dibaryon is likely to be unbound by 13 _ 14 MeV at the physical point.P.E. Shanahan, A.W. Thomas and R.D. Youn

Publisher: American Physical Soc
Year: 2011
DOI identifier: 10.1103/PhysRevLett.107.092004
OAI identifier: oai:digital.library.adelaide.edu.au:2440/71064
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