4.7 Article

Study of decuplet baryon resonances from lattice QCD

Journal

PHYSICAL REVIEW D
Volume 93, Issue 11, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.93.114515

Keywords

-

Funding

  1. Research Executive Agency of the European Union [PITN-GA-2009-238353]
  2. U.S. Department of Energy (DOE) Office of Nuclear Physics [DE-SC0011090, ER41888, DE-AC02-05CH11231]
  3. RIKEN Foreign Postdoctoral Researcher Program
  4. Office of Science of the DOE [DE-AC02-05CH11231]
  5. Julich Supercomputing Center
  6. PRACE EU FP7 [2011040546]
  7. Cyprus Research Promotion Foundation [YPiODeltaOMH/SigmaTPATH/0308/31]
  8. PRACE [RI-211528, FP7-261557]

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A lattice QCD study of the strong decay width and coupling constant of decuplet baryons to an octet baryon-pion state is presented. The transfer matrix method is used to obtain the overlap of lattice states with decuplet baryon quantum numbers on the one hand and octet baryon-pion quantum numbers on the other as an approximation of the matrix element of the corresponding transition. By making use of leading-order effective field theory, the coupling constants as well as the widths for the various decay channels are determined. The transitions studied are Delta -> pi N, Sigma* -> Lambda pi, Sigma* -> Sigma pi and Xi* -> Xi pi. We obtain results for two ensembles of N-f = 2 + 1 dynamical fermion configurations: one using domain wall Valence quarks on a staggered sea at a pion mass of 350 MeV and a box size of 3.4 fm and a second one using domain wall sea and valence quarks at pion mass 180 MeV and box size 4.5 fm.

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