Searching for the quarkdiquark systematics of baryons composed by light quarks q = u, d

A. V. Anisovich, V. V. Anisovich, M. A. Matveev, V. A. Nikonov, A. V. Sarantsev, T. O. Vulfs

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


Supposing quarkdiquark structure of baryons, we look for systematics of baryons composed of light quarks (q = u, d). We systematize baryons using the notion of two diquarks: (i) axialvector state, D1 1, with the spin SD = 1 and isospin ID = 1 and (ii) scalar one, D 0 0, with the spin SD = 0 and isospin ID = 0. We consider several schemes for the composed baryons: (1) with different diquark masses, M D 0 0 ≠ M D 11, (2) with M D00 = M D 11 and overlapping q D00 and qD11 states (resonances), (3) with/without SU(6) constraints for low-lying states (with quarkdiquark orbital momenta L = 0). In the high-mass region, the model predicts several baryon resonances at M ∼ 2.02.9 GeV. Moreover, the model gives us the double pole structure (i.e. two poles with the same Re M but different Im M) in many amplitudes at masses M ≳ 2.0 GeV. We see also that for description of low-lying baryons (with L = 0), the SU(6) constraint is needed.

Original languageEnglish
Pages (from-to)2965-2995
Number of pages31
JournalInternational Journal of Modern Physics A
Issue number15
StatePublished - 20 Jun 2010
Externally publishedYes


  • Quark model
  • baryon
  • diquark
  • systematics

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Astronomy and Astrophysics


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