Mixing of pseudoscalar-baryon and vector-baryon in theJP=1/2−sector and theN*(1535) andN*(1650) resonances

2014/11/13 by E. J. Garzón, E. J. Garzon, E. Oset · 1 citation
Physics and Astronomy · #Baryon #Meson #Partial wave analysis #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics of Superconductivity and Magnetism #Pseudoscalar #Pseudoscalar meson #Quantum Chromodynamics and Particle Interactions #Resonance (particle physics) #hep-ph #nucl-th

paper · pdf · doi:10.1103/physrevc.91.025201

published as Phys. Rev. C 91, 025201 (2015)

arxiv created 2014/11/13 · openalex publication_date 2015/02/04 · arxiv updated 2015/03/04 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We study the meson-baryon interaction with J^P=1/2^\ensuremath- using the hidden-gauge Lagrangians and mixing pseudoscalar meson-baryon with the vector meson-baryon states in a coupled channels scheme with \ensuremathπN,\phantom\rule0.16em0ex\ensuremathηN,\phantom\rule0.16em0exK\ensuremathΛ,\phantom\rule0.16em0exK\ensuremathΣ,\phantom\rule0.16em0ex\ensuremathρN, and \ensuremathπ\ensuremathΔ (d wave). We fit the subtraction constants of each channel to the S₁₁ partial wave amplitude of the \ensuremathπN scattering data extracted from the partial wave analysis of the George Washington group. We find two poles that we associate to the N^*(1535) and the N^*(1650) resonances, with negative subtraction constants of natural size, and compare the results with empirical determinations of these pole positions. We calculate the branching ratios for the different channels of each resonance and we find a good agreement with the experimental data. The cross section for the \ensuremathπ^\ensuremath-p\ensuremath→\ensuremathηn scattering is also evaluated and compared with experiment.

Citations

• Unitary coupled channel analysis of theΛ(1520)resonance
• Chiral unitary mesonâbaryon dynamics in the presence of resonances: elastic pionânucleon scattering
• Chiral symmetry amplitudes in the S-wave isoscalar and isovector channels and the σ, f0(980), a0(980) scalar mesons
• Nucleon resonances within a dynamical coupled-channels model ofπNandγNreactions
• Case in favor of theN*(1700)(3/2−)
• s-wave pion nucleon scattering lengths fromπN, pionic hydrogen, and deuteron data
• Dispersion relation constrained partial wave analysis ofπNelastic andπN→ηNscattering data: The baryon spectrum
• N∗ and Δ∗ decays into Nπ0π0
• Big-Bang Nucleosynthesis

Cited by

• Strong decays of baryons and missing resonances