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

2011/11/30 by A. V. Anisovich, E. Klempt, V. A. Nikonov +2 · 1 citation
Physics and Astronomy · #hep-ex

paper · pdf · doi:10.1016/j.physletb.2012.03.066

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

arxiv created 2011/12/21 · arxiv updated 2015/06/03

Abstract

Results from a multi-channel partial wave analysis of elastic and inelastic πN and γN 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 ±130 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.

Cited by

• Measurement of single- and double-polarization observables in the photoproduction of π⁺π^-~meson pairs off the proton using CLAS at Jefferson Laboratory

Related

• Spin-5/2 resonance effects in a coupled channel nucleon resonance analysis
• Perturbative QCD Evidence for Spin-2 Particles in the Di-J/ψ Resonances
• Telling the spin of the di-photon resonance
• Elastic π-N scattering in the I=3/2 channel
• Pion electroproduction on the nucleon and the generalized GDH sum rule