Variational Monte Carlo Study of Pentaquark States in a Correlated Quark Model.

Paris, M. W.

Technical Information Center Oak Ridge Tennessee

关键词: Pentaquarks;    Quark model;    Monte Carlo method;    Numerical simulation;    Resonance;   

RP-ID  :  DE2006861941

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

Accurate numerical solution of the five-body Schrodinger equation is effected via variational Monte Carlo in a correlated quark model. The spectrum is assumed to exhibit a narrow resonance with strangeness S = +1. A fully antisymmetrized and pair-correlated five-quark wave function is obtained for the assumed non-relativistic Hamiltonian which has spin, isospin, and color dependent pair interactions and many-body confining terms which are fixed by the non-exotic spectra. Gauge field dynamics are modeled via flux tube exchange factors. The energy determined for the ground states with spin-parity = 1/2 -(1/2+) is 2.22 GeV (2.50 GeV). A lower energy negative parity state is consistent with recent lattice results.