Three Body Systems with Strangeness and Exotic Systems

• Published in: Few-body systems 2011-05, Vol.50 (1-4), p.129-135
• Main Authors: Oset, E., Martinez Torres, A., Khemchandani, K. P., Roca, L.
• Format: Article
• Language: English
• Subjects: Atomic; Atoms & subatomic particles; Hadrons; Heavy Ions; Molecular; Nuclear Physics; Optical and Plasma Physics; Particle and Nuclear Physics; Physics; Physics and Astronomy; Quantum physics
• ISSN: 0177-7963; 1432-5411
• DOI: 10.1007/s00601-010-0119-3

We report on four Σ ’s and three Λ ’s, in the 1500–1800 MeV region, as two meson—one baryon S-wave (1/2) + resonances found by solving the Faddeev equations in the coupled channel approach, which can be associated to the existing S  = −1, J P  = 1/2 + low lying baryon resonances. On the other hand we also report on a new, hidden strangeness N * state, mostly made of , with mass around 1920 MeV, which we think could be responsible for the peak seen in the γp → K + Λ around this energy. Finally we address a very novel topic in which we show how few body systems of several ρ mesons can be produced, with their spins aligned up to J  = 6, and how these states found theoretically can be associated to several known mesons with spins J  = 2, 3, 4, 5, 6.