A consistent explanation of the Roper phenomenology

Abstract

We study the electromagnetic transitions of the Roper N(1440) resonance. Our results, when combined with the previously obtained for the mass and the pionic strong decay widths of the Roper, show that within a non-relativistic constituent quark model scheme, a comprehensible understanding of the Roper phenomenology can be achieved. They also seem to support the view of the Roper as a radial excitation of the nucleon, though more experimental data are needed to reach a definitive conclusion.

14 pages, 4 figures (7 postscript files). Some referencess added

References in corpus (3)

• Electroproduction of the Roper resonance and the constituent quark model
• Strong Pionic Decays From a Spectroscopic Quark Model
• A (p/E) Calculation of Strong Pionic Decays of Baryons

Cited by in corpus (39)

• Electroexcitation of nucleon resonances
• Electromagnetic Meson Production in the Nucleon Resonance Region
• Electron- and neutrino-nucleus scattering from the quasielastic to the resonance region
• Charged Current Neutrino Nucleus Interactions at Intermediate Energies
• The $N^{\ast }(1710)$ as a resonance in the $\pi \pi N$ system
• Electroexcitation of the P33(1232), P11(1440), D13(1520), S11(1535) at Q^2=0.4 and 0.65(GeV/c)^2
• Electroexcitation of the Roper resonance for 1.7 < Q2 < 4.5 GeV2 in ep -> enpi+
• Single pi+ Electroproduction on the Proton in the First and Second Resonance Regions at 0.25GeV^2 < Q^2 < 0.65GeV^2 Using CLAS
• Cross sections and beam asymmetries for $\vev{e}p \to enπ^+$ in the nucleon resonance region for $1.7\le Q^2\le 4.5(GeV{)}^2$
• Nucleon resonances in AdS/QCD
• Model Analysis of the $ep\to e{p}^{\prime }{\pi }^{+}{\pi }^{-}$ Electroproduction Reaction on the Proton
• Valence quark contributions for the gamma N -> P11(1440) form factors
• The S- and P-wave low-lying baryons in the chiral quark model
• Neutral current neutrino-nucleus interactions at intermediate energies
• Electroproduction of p π^{+} π^{-} off protons at 0.2<Q^{2}<0.6 GeV^{2} and 1.3<W<1.57 GeV with CLAS
• Electroproduction of the Roper resonance on the proton: the role of the three-quark core and the molecular N-sigma component
• Electromagnetic Transition Form Factors of Baryon Resonances
• The two pion decay of the Roper resonance
• Measurement of the Polarized Structure Function ${\sigma }_{L{T}^{\prime }}$ for Pion Electroproduction in the Roper Resonance Region
• Electromagnetic transition form factors of the Roper resonance in effective field theory
• Pion electro-production in the Roper region in chiral quark models
• Study of nucleon resonances with electromagnetic interactions
• Valence quark contributions for the ${\gamma }^{\ast }N\to N(1440)$ form factors from Light-Front holography
• Electromagnetic structure of the nucleon and the Roper resonance in a light-front quark approach
• Nuclear response functions for the N-N*(1440) transition
• N^* electroproduction amplitudes in a model with dynamical confinement
• The Roper resonance: a genuine quark state or a dynamically generated structure?
• Status of the N* Program at Jefferson Lab
• Spectrum and Structure of Excited Baryons with CLAS
• An introduction to the quark model
• On the nature of the Roper resonance
• Highlights of Recent Results with Clas
• Electromagnetic Form Factors of the Nucleon in a Relativistic Quark Pair Creation Model
• Meson Production and Baryon Resonances at CLAS
• The N* Physics Program at Jefferson Lab
• Irreducible tensor approach to spin observables in photo production of mesons with arbitrary spin-parity $s^{\pi }$
• Study of $N(1440)$ structure via ${\gamma }^{\ast }p\to N(1440)$ transition
• Electroexcitation of the Roper resonance from CLAS data
• Investigation of $\Delta (1232)$ resonance substructure in $p{\gamma }^{\ast }\to \Delta (1232)$ process through helicity amplitudes