Variational Monte Carlo study of pentaquark states

Details Variational Monte Carlo study of pentaquark states Variational Monte Carlo study of pentaquark states

2005-07-26

arxiv.org/abs/nucl-th/0507061v2

Phys.Rev.Lett. 95 (2005) 202002

Physics

Nuclear Physics

Nuclear Theory

4 pages, 2 figures; revised for PRL, in press

Scientific paper

10.1103/PhysRevLett.95.202002

Accurate numerical solution of the five-body Schrodinger equation is effected via variational Monte Carlo. 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 J=1/2 and negative (positive) parity is 2.22 GeV (2.50 GeV). A lower energy negative parity state is consistent with recent lattice results. The short-range structure of the state is analyzed via its diquark content.

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