Magnetic moment of the pentaquark Θ+(1540) as diquark-diquark-antiquark state with QCD sum rules

2005/03/31 by Zhi-Gang Wang, Z. G. Wang, Shaolong Wan +2 · 2 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1140/epjc/s2005-02400-1

published as Eur.Phys.J.C45:201-209,2006 · 17 pages, 4 figures, unifing hep-ph/0503007 with hep-ph/0503073 into one article, input parameters changed slightly, add more discussions

arxiv created 2005/06/27 · openalex publication_date 2005/10/20 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

In this article, we study the magnetic moment of the pentaquark state Θ⁺(1540) as diquark-diquark-antiquark ([ud][ud]s) state with the QCD sum rules in the external weak electromagnetic field (EFSR) and the light-cone QCD sum rules (LCSR) respectively. The numerical results indicate the magnetic moment is about μ_Θ⁺=-(0.11± 0.02)μ_N for the EFSR and μ_Θ⁺≈-(0.1-0.5)μ_N for the LCSR. As the values obtained from the EFSR are more stable than the corresponding ones from the LCSR, μ_Θ⁺=-(0.11± 0.02)μ_N is more reliable.

Citations

• A Method to Unambiguously Determine the Parity of the + Pentaquark
• Calculation of some properties of the vacuum

Cited by

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