2005/02/28 by Tetsuo Hyodo, Atsushi Hosaka · 3 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevd.71.054017
published as Phys.Rev. D71 (2005) 054017 · RevTeX4, 8 pages, 1 figure, 8 tables, Version to appear in Phys. Rev. D
arxiv created 2005/03/10 · openalex publication_date 2005/03/15 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
We examine several assignments of spin and parity for the pentaquark \ensuremathΘ+ state (JP=1/2^\ifmmode±\else\textpm\fi,3/2^\ifmmode±\else\textpm\fi) in connection with known baryon resonances. Assuming that the \ensuremathΘ+ belongs to an antidecuplet representation which mixes with an octet, we calculate the mass spectra of the flavor partners of the \ensuremathΘ+ based on the SU(3) symmetry. The decay widths of the \ensuremathΘ+ and nucleon partners are analyzed for the consistency check of the mixing angle obtained from the masses. It is found that a suitable choice of the mixing angle successfully reproduces the observed masses of \ensuremathΘ(1540) and \ensuremathΞ3/2(1860), when their spin and parity are assigned to be JP=3/2^\ensuremath-, together with other JP=3/2^\ensuremath- resonances. The decay widths of \ensuremathΘ\ensuremath→KN, N(1520)\ensuremath→\ensuremathπN, and N(1700)\ensuremath→\ensuremathπN are also reproduced simultaneously.