Valence quark contributions for the gamma N -> P11(1440) form factors

Abstract

Using a covariant spectator quark model we estimate valence quark contributions to the F1*(Q2) and F2*(Q2) transition form factors for the gamma N -> P11(1440) reaction. The Roper resonance, P11(1440), is assumed to be the first radial excitation of the nucleon. The present model requires no extra parameters except for those already fixed by the previous studies for the nucleon. Our results are consistent with the experimental data in the high Q2 region, and those from lattice QCD. We also estimate the meson cloud contributions, focusing on the low Q2 region, where they are expected to be dominant.

11 pages, 5 figures. Published in Phys.Rev. D

References in corpus (18)

• Unitary Isobar Model - MAID2007
• Dynamical Coupled-Channel Model of $\pi N$ Scattering in the W $\le$ 2 GeV Nucleon Resonance Region
• Dynamical Coupled-Channels Effects on Pion Photoproduction
• A pure S-wave covariant model for the nucleon
• Extraction and Interpretation of gamma N --> Delta Form Factors within a Dynamical Model
• D-state effects in the electromagnetic N-Delta transition
• A Covariant model for the nucleon and the $\Delta$
• A relativistic quark model for the Omega- electromagnetic form factors
• Electroexcitation of the Roper resonance in the relativistic quark models
• Chiral extrapolation of nucleon magnetic form factors
• Dynamical coupled-channels analysis of 1H(e,e'pi)N reactions
• Empirical transverse charge densities in the nucleon-to-P11(1440) transition
• The role of $qqqq\bar{q}$ components in the nucleon and the N(1440) resonance
• The role of $q\bar{q}$ components in the N(1440) resonance
• First Lattice Study of the $N$-$P_{11}(1440)$ Transition Form Factors
• Fixed-axis polarization states: covariance and comparisons
• Electromagnetic form factors of the Delta in a S-wave approach
• The reaction pi N to pi pi N in a meson-exchange approach

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