Z(4430)and a new paradigm for spin interactions in tetraquarks

2014/05/17 by Luciano Maiani, L. Maiani, F. Piccinini +2
Chemistry · Physics and Astronomy · #Advanced NMR Techniques and Applications #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1103/physrevd.89.114010

17 pages, 1 figure, comments added, typos corrected, to appear in Phys Rev D

arxiv created 2014/05/17 · openalex publication_date 2014/06/06 · arxiv updated 2015/06/19 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

Following the recent confirmation of the Z⁺(4430) resonance with J^PG=1⁺⁺, we have re-examined the model of S- and P-wave tetraquarks. We propose a ``type-II'' diquark-antidiquark model which shows to be very effective at producing a simple and comprehensive picture of the J^PG=1⁺⁺ and 1^\ensuremath-\ensuremath- sectors of the recently discovered charged tetraquarks and of the observed Y resonances. The model is still faced with the unresolved difficulty of explaining why some states seem to have incomplete isospin multiplets.

Citations

• New Spectroscopy with Charm and Beauty Multiquark States
• Observation of a Resonancelike Structure in theπ+−ψ′Mass Distribution in ExclusiveB→Kπ+−ψ′Decays
• Note on a sigma model connection with instanton dynamics
• More loosely bound hadron molecules at CDF?
• Search for a charged partner of theX(3872)in theBmeson decayB→X−K,X−→J/ψπ−π0
• Search for theZ(4430)−atBABAR
• Observation of the Resonant Character of theZ(4430)−State
• Production of theX(3872)at the Tevatron and the LHC