Evidence for a spin-quartet of nucleon resonances at 2\,GeV

A. V. Anisovich; E. Klempt; V. A. Nikonov; A. V. Sarantsev; U. Thoma

doi:10.1016/j.physletb.2012.03.066

Evidence for a spin-quartet of nucleon resonances at 2\,GeV

High Energy Physics - Experiment 2015-06-03 v2

Authors: A. V. Anisovich , E. Klempt , V. A. Nikonov , A. V. Sarantsev , U. Thoma

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Abstract

Results from a multi-channel partial wave analysis of elastic and inelastic $\pi N$ and $\gamma N$ induced reactions are presented. The analysis evidences the existence of a spin-quartet of nucleon resonances with total angular momenta $J^P=1/2^+,..., 7/2^+$ . All states fall into a $\pm130$ \,MeV mass gap centered at 1.97\,GeV. The spin quartet is at variance with S-wave diquark configurations required in classical di-quark models.

Keywords

nucleon resonances spin quartet partial wave analysis elastic scattering inelastic scattering diquark models angular momentum

Cite

@article{arxiv.1111.6150,
  title  = {Evidence for a spin-quartet of nucleon resonances at 2\,GeV},
  author = {A. V. Anisovich and E. Klempt and V. A. Nikonov and A. V. Sarantsev and U. Thoma},
  journal= {arXiv preprint arXiv:1111.6150},
  year   = {2015}
}

Comments

12 pages, 3 figures, 3 tables, reanalysis with improved errors

Evidence for a spin-quartet of nucleon resonances at 2\,GeV

Abstract

Keywords

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