2004/10/31 by Tetsuo Nishikawa, Yoshiko Kanada-En’yo, Yoshiko Kanada-En'yo +2 · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.71.016001
published as Phys.Rev. D71 (2005) 016001 · 5 pages, 4 figures
arxiv created 2004/11/09 · openalex publication_date 2005/01/05 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We study the pentaquark uudds with J=3/2 and I=1 (\ensuremathΘ++) in the QCD sum rule approach. We derive the QCD sum rules for positive and negative parity states of the pentaquark. The QCD sum rule predicts that there exists \ensuremathΘ++ with negative parity and its mass is 1.5\ensuremath∼1.6 GeV. The negative parity \ensuremathΘ++ can be extremely narrow, since it lies much below the \ensuremathΔK threshold and the decay into NK state is strongly suppressed due to the D-wave centrifugal barrier. Also, the possibility of the existence of the \ensuremathΘ++ with positive parity is not excluded. Although it nearly degenerates with the negative parity state, it may be broader than the negative parity state.