Study of decuplet baryon resonances from lattice QCD

被引：18

作者：

Alexandrou, C. ^{[1
,2
]}

Negele, J. W. ^{[3
,4
]}

Petschlies, M. ^{[2
,5
]}

Pochinsky, A. V. ^{[3
,4
]}

Syritsyn, S. N. ^{[6
]}

机构：

[1] Univ Cyprus, Dept Phys, POB 20537, CY-1678 Nicosia, Cyprus

[2] Cyprus Inst, Computat Based Sci & Technol Res Ctr, 20 Kavafi St, CY-2121 Nicosia, Cyprus

[3] MIT, Ctr Theoret Phys, Nucl Sci Lab, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[4] MIT, Dept Phys, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[5] Univ Bonn, Helmholtz Inst Strahlen & Kernphys, Nussallee 14-16, D-53115 Bonn, Germany

[6] Brookhaven Natl Lab, RIKEN, BNL Res Ctr, Upton, NY 11973 USA

来源：

PHYSICAL REVIEW D | 2016年 / 93卷 / 11期

关键词：

QUANTUM-FIELD THEORIES; VOLUME DEPENDENCE; ENERGY-SPECTRUM;

D O I：

10.1103/PhysRevD.93.114515

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页数：16

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