Study of decuplet baryon resonances from lattice QCD
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...
| Main Authors: | , , , , |
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| Outros autores: | |
| Formato: | Artigo |
| Idioma: | English |
| Publicado: |
American Physical Society
2017
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| Acceso en liña: | http://hdl.handle.net/1721.1/110610 https://orcid.org/0000-0002-5713-0039 |
| Summary: | 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 Δ→πN, Σ[superscript *]→Λπ, Σ^[superscript *]→Σπ and Ξ[superscript *]→Ξπ. We obtain results for two ensembles of N[subscript 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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