Baryon Resonance Extraction from piN Data using a Unitary Multichannel Model

Abstract

A unitary multi-channel approach, first developed by the Carnegie-Mellon- Berkeley group, is applied to extract the pole positions, masses, and partial decay widths of nucleon resonances. Input used are the partial wave amplitudes for the transitions from piN to eight possible final baryon-meson final states. Because the model preserves analyticity, resonances are found as poles in the T matrix. This approach is designed to handle inelastic threshold openings with minimal model dependence. Although many of the known states have the same properties as in previous analyses, others change significantly. We pay particular attention to S11(1535) which is very close to the eta threshold.

73 pages, 15 figures, accepted for publ. in Phys. Repts

Cited by in corpus (124)

• Baryon spectroscopy
• Properties of baryon resonances from a multichannel partial wave analysis
• Chiral unitary approach to S-wave meson baryon scattering in the strangeness S=0 sector
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• Dynamical coupled-channel model of meson production reactions in the nucleon resonance region
• Nucleon resonances within a dynamical coupled-channels model of pi N and gamma N reactions
• Coupled-channel dynamics in the reactions piN --> piN, etaN, KLambda, KSigma
• Electromagnetic Meson Production in the Nucleon Resonance Region
• Analytic properties of the scattering amplitude and resonances parameters in a meson exchange model
• Study of Non-Strange Baryon Resonances with Meson Photoproduction
• The $S_{11}-N$(1535) and $-N$(1650) Resonances in Meson-Baryon Unitarized Coupled Channel Chiral Perturbation Theory
• Vector meson production and nucleon resonance analysis in a coupled-channel approach for energies m_N < sqrt(s) < 2 GeV I: pion-induced results and hadronic parameters
• Dispersion Relation Constrained Partial Wave Analysis of piN Elastic and piN\to\etaN Scattering Data: The Baryon Spectrum
• Disentangling the dynamical origin of P11 Nucleon Resonances
• Coupled-channel analysis of the $\omega$-meson production in $\pi N$ and $\gamma N$ reactions for c.m. energies up to 2 GeV
• The e p -> e' p eta reaction at and above the S11(1535) baryon resonance
• Measurement of $ep\to e^{{}^{\prime }}p{\pi }^{+}{\pi }^{-}$ and baryon resonance analysis
• Kaon photoproduction: background contributions, form factors and missing resonances
• ${\pi }^{+}$ photoproduction on the proton for photon energies from 0.725 to 2.875 GeV
• Hadronic Spectral Functions in Nuclear Matter
• Differential cross section measurement of eta photoproduction on the proton from threshold to 1100 MeV
• The Chiral Restoration Transition of QCD and Low Mass Dileptons
• Q^2 Dependence of the S_{11}(1535) Photocoupling and Evidence for a P-wave resonance in eta electroproduction
• Properties of $\rho$ and $\omega$ Mesons at Finite Temperature and Density as Inferred from Experiment
• Odd Parity Light Baryon Resonances
• Eta-meson production in the resonance energy region
• Multichannel parametrization of πN scattering amplitudes and extraction of resonance parameters
• Quasifree Kaon Photoproduction on Nuclei
• Covariant L-S Scheme for the effective N*NM couplings
• The role of $N^{\ast }(1535)$ in $pp\to pp\varphi$ and ${\pi }^{-}p\to n\varphi$ reactions
• The reaction pi+ p --> K+ Sigma+ in a unitary coupled-channels model
• Dynamical coupled-channels model of $K^{-}p$ reactions (I): Determination of partial-wave amplitudes
• Electroexcitation of nucleon resonances at Q^2=0.65 GeV/c^2 from a combined analysis of single- and double-pion electroproduction data
• Observation of Two New N* Peaks in J/psi -> $pp{i}^{-}\bar{n}$ and $\bar{p}{\pi }^{+}n$ Decays
• Isospin decomposition of $\gamma N\to N^{\ast }$ transitions within a dynamical coupled-channels model
• The role of Delta(1700) excitation and rho production in double pion photoproduction
• Model Analysis of the $ep\to e{p}^{\prime }{\pi }^{+}{\pi }^{-}$ Electroproduction Reaction on the Proton
• Dynamical coupled-channels study of pi N --> pi pi N reactions
• The role of the background in the extraction of resonance contributions from meson-baryon scattering
• Effective Lagrangian Approach to pion photoproduction from the nucleon
• Resonance Contributions to $\eta$ Photoproduction on Protons Found Using Dispersion Relations and an Isobar Model
• Extraction of P11 resonances from pi N data
• A covariant model for the gamma N -> N(1535) transition at high momentum transfer
• Coupled-channels study of the ${\pi }^{-}p\to \eta n$ process
• A Genetic Algorithm Analysis of N* Resonances in $p(\gamma ,K^{+})\Lambda$ Reactions
• On the nature of the lowest $1/2^{-}$ baryon nonet and decuplet
• Study of the gamma p --> pi0 pi0 p reaction with the Crystal Ball/TAPS at the Mainz
• Hadron structure at low Q^2
• Low-energy etaN interactions: scattering lengths and resonance parameters
• The role of ${\Delta }^{++\ast }(1620)$ resonances in $pp\to n{K}^{+}{\Sigma }^{+}$ reaction and its important implications
• P-wave excited baryons from pion- and photo-induced hyperon production
• A model for the Delta(1600) resonance and gamma N -> Delta(1600) transition
• A possible interpretation of the newly observed $\Omega (2012)$ state
• Excitation of S11 resonances in pion scattering and pion photoproduction on the proton
• Study of π^{-}p \to ηn at low energies in a chiral constituent quark model
• Coupled-channel analysis of $K\Sigma$ production on the nucleon up to 2.0 GeV
• Off-shell omega production in proton-proton collisions near threshold
• Extraction of N* information from the limited p(gamma,K+)Lambda data set
• Clues to the nature of the Delta^*(1700) resonance from pion- and photon-induced reactions
• Backward-angle photoproduction of eta meson from protons at E_gamma = 1.6 - 2.4 GeV
• Mixing of pseudoscalar-baryon and vector-baryon in the $J^P=1/2^{-}$ sector and the $N^{\ast }$(1535) and $N^{\ast }$(1650) resonances
• Partial wave analysis of J/psi to p pbar pi0
• Plausible explanation of the ${\Delta }_{5/2^{+}}(2000)$ puzzle
• Dilepton production in heavy-ion collisions with in-medium spectral functions of vector mesons
• The piN --> etaN data demand the existence of N(1710) P11 resonance reducing the 1700 MeV continuum ambiguity
• Quantum interference of rho0- and omega-mesons in the pi N -> e+e- N reaction
• Strong decay of low-lying $S_{11}$ and $D_{13}$ nucleon resonances to pseudoscalar mesons and octet baryons
• Hybrid and Conventional Baryons in the Flux-Tube Model
• Properties of Nucleon Resonances by means of a Genetic Algorithm
• Dynamical Test of Constituent Quark Models with $\pi N$ Reactions
• Role of a triangle singularity in the $\pi \Delta$ decay of the $N(1700)(3/2^{-})$
• Model dependence of single-energy fits to pion photoproduction data
• New data on $\vec{\gamma }\vec{p}\to \eta p$ with polarized photons and protons and their implications for $N^{\ast }\to N\eta$ decays
• Properties of the $\omega$ Meson at Finite Temperature and Density
• The $\Sigma$(1385) photoproduciton from proton within a Regge-plus-resonance approach
• Coupling Constant for ${\mathbf{N}}^{\ast }(1535)\mathbf{N}\rho$
• Role of the $N^{\ast }(1535)$ in the ${\Lambda }_c^{+}\to {\bar{K}}^0\eta p$ decay
• ${\gamma }^{\ast }N\to N(1710)$ transition at high momentum transfer
• Pion-nucleon charge-exchange amplitudes above 2 GeV
• Study of nucleon resonances with electromagnetic interactions
• Roper resonances in chiral quark models
• The reaction pi N to pi pi N in a meson-exchange approach
• Two-Pion production in the second resonance region in ${\pi }^{-}p$ collisions with HADES
• $2\pi$ production in the Giessen coupled-channel model
• Hints on the quadrupole deformation of the $\Delta$(1232)
• Partial wave analysis of $\psi (2S)\to p\bar{p}\eta$
• Evidence for a negative-parity spin-doublet of nucleon resonances at 1.88\,GeV
• A chiral quark model for meson electro-production in the S11 partial wave
• $\eta$ production off the proton in a Regge-plus-chiral quark approach
• Multichannel Anomaly of the Resonance Pole Parameters Resolved
• Model-independent resonance parameter extraction using the trace of K and T matrices
• Searching for the quark--diquark systematics of baryons composed by light quarks $q=u,d$
• Correlations of $\mathbf{\pi N}$ Partial Waves for Multi-Reaction Analyses
• Analysis of recent eta photoproduction data
• Meson-baryon threshold effects in the light-quark baryon spectrum
• Crossing symmetry and phenomenological widths in effective Lagrangian models of the pion photoproduction process
• QCD sum rules at finite density in the large-N_c limit: The coupling of the rho-nucleon system to the D_{13}(1520)
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• Complementary studies on $N^{\ast }$ from $e^{+}{e}^{-}$, $pp$ and $p\bar{p}$ collisions
• The pp -> pp pi pi pi reaction channels in the threshold region
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• Analysis of the quadrupole deformation of $\Delta$(1232) within an effective Lagrangian model for pion photoproduction from the nucleon
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• Spectral-fluctuations test of the quark-model baryon spectrum
• Reexamination of the role of the ${\Delta }^{\ast }$ resonances in the $pp\to n{K}^{+}{\Sigma }^{+}$ reaction
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• The re-analysis of the 1700 MeV structure of the P11 partial wave using the piN->KLambda production data
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• πN and ηp deexcitation channels of the N^* and Δbaryonic resonances between 1470 and 1680 MeV
• Role of t-channel meson exchange in S-wave pi N and K N scattering
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• Stability of the Zagreb Carnegie-Mellon-Berkeley model
• Spectral-statistics properties of the experimental and theoretical light baryon and meson spectra
• Light-quark baryon spectroscopy from ANL-Osaka dynamical coupled-channels analysis
• Delta rho pi interaction leading to N* and Delta* resonances
• A simple plan for the Delta resonance
• Meson Production Experiments with Electromagnetic Beams using CLAS
• Coherent bubble-sum approximation for coupled-channel resonance scattering
• Observation of ${\chi }_{cJ}(J=0,1,2)\to p\bar{p}\eta \eta$