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Title: Present constraints on the H-dibaryon at the physical point from Lattice QCD

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 form of the chiral and continuum extrapolations to the physical point are not determined. In this brief report, an extrapolation that is quadratic in the pion mass, motivated by low-energy effective field theory, is considered. An extrapolation that is linear in the pion mass is also considered, a form that has no basis in the effective field theory, but is found to describe the light-quark mass dependence observed in Lattice QCD calculations of the octet baryon masses. In both cases, the extrapolation to the physical pion mass allows for a bound H-dibaryon or a near-threshold scattering state.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [3] ;  [2] ;  [5] ;  [7] ;  [8]
  1. Institut fur theoretische Physik, Bern (Switzerland); Univ. of New Hampshire, Durham, NH (United States)
  2. Univ. de Barcelona (Spain)
  3. College of William and Mary, Williamsburg, VA (United States); Jefferson Lab., Newport News, VA (United States)
  4. Jefferson Lab., Newport News, VA (United States)
  5. Univ. of Washington, Seattle, WA (United States)
  6. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  7. Indiana Univ., Bloomington, IN (United States)
  8. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
OSTI Identifier:
1028775
Report Number(s):
JLAB-THY--11-1326; DOE/OR/23177--1492; arXiv:1103.2821
Journal ID: ISSN 0217-7323; TRN: US1105493
Grant/Contract Number:
FG03-97ER4014; AC05-06OR23177; FG02-04ER41302; FG02-07ER41527; FC02-06ER41443; AC52-07NA27344; FC02-07ER41457; AC02-05CH11231
Type:
Accepted Manuscript
Journal Name:
Modern Physics Letters A
Additional Journal Information:
Journal Volume: 26; Journal Issue: 34; Journal ID: ISSN 0217-7323
Publisher:
World Scientific Publishing
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Contributing Orgs:
NPLQCD Collaboration
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BARYONS; BINDING ENERGY; EXTRAPOLATION; PIONS; QUANTUM CHROMODYNAMICS; SCATTERING H-dibaryon; Lattice QCD