Are + and the Roper resonance diquark-diquark-antiquark states?
Abstract
We consider a [ud]2s current in the QCD sum rule framework to study the mass of the recently observed pentaquark state +(1540), obtaining good agreement with the experimental value. We also study the mass of the pentaquark [ud]2d. Our results are compatible with the interpretation of the [ud]2d state as being the Roper resonance N(1440), as suggested by Jaffe and Wilczek.
0
Turn this paper into a full lesson
ArcXiv compiles a staged curriculum from this paper: 8-12 lessons across beginner → advanced, synthesised section guides, visuals, flashcards, a quiz, exercises, and on-demand deep dives per section. Grounded in the abstract, never invented.