Baryon Resonance Analysis from MAID

Abstract

The unitary isobar model MAID2007 has been used to analyze the recent data of pion electroproduction. The model contains all four-star resonances in the region below W=2 GeV and both single-Q^2 and Q^2 dependent transition form factors could be obtained for the Delta, Roper, D13(1520), S11(1535), S31(1620), S11(1650), D15(1675), F15(1680) and P13(1720). From the complete world data base, including also pi- data on the neutron, also Q^2 dependent neutron form factors are obtained. For all transition form factors we also give convenient numerical parameterizations that can be used in other reactions. Furthermore, we show how the transition form factors can be used to obtain empirical transverse charge densities and our first results are given for the Roper, the S11 and D13 resonances.

8 pages, 11 figures, 4 tables, Proc. of NSTAR2009, Beijing

References in corpus (3)

• Unitary Isobar Model - MAID2007
• Empirical transverse charge densities in the nucleon and the nucleon-to-$\Delta$ transition
• Empirical transverse charge densities in the nucleon-to-P11(1440) transition

Cited by in corpus (28)

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• Neutrino-Induced Reactions on Nuclei
• Electroweak axial structure functions and improved extraction of the $V_{ud}$ CKM matrix element
• Electromagnetic Transition Form Factors of Baryon Resonances
• Valence quark and meson cloud contributions to the ${\gamma }^{\ast }N\to N^{\ast }(1520)$ form factors
• Muon-neutrino-induced charged current pion production on nuclei
• Nucleon resonances in Compton scattering
• Using the Single Quark Transition Model to predict nucleon resonance amplitudes
• Effects of a spin-flavour dependent interaction on light-flavoured baryon helicity amplitudes
• Semirelativistic approximation to the ${\gamma }^{\ast }N\to N(1520)$ and ${\gamma }^{\ast }N\to N(1535)$ transition form factors
• ${\gamma }^{\ast }N\to N(1710)$ transition at high momentum transfer
• A chiral quark model for meson electro-production in the region of D-wave resonances
• Improved empirical parametrizations of the ${\gamma }^{\ast }N\to \Delta (1232)$ and ${\gamma }^{\ast }N\to N(1520)$ helicity amplitudes and the Siegert's theorem
• $N^{\ast }$ Form Factors based on a Covariant Quark Model
• Improved empirical parametrizations of the ${\gamma }^{\ast }N\to N(1535)$ transition amplitudes and the Siegert's theorem
• A chiral quark model for meson electro-production in the S11 partial wave
• Covariant model for the Dalitz decay of the $N(1535)$ resonance
• Nucleon to $\Delta$ transition form factors and empirical transverse charge densities
• Global Data-Driven Determination of Baryon Transition Form Factors
• Structure of the orbital excited $N^{\ast }$ from the Schwinger-Dyson equations
• Chiral quark model approach for the study of baryon resonances
• Electromagnetic transition form factors of nucleons from the hard-wall AdS/QCD model
• A covariant model for the ${\gamma }^{\ast }N\to N^{\ast }(1520)$ reaction
• Investigation of $\Delta (1232)$ resonance substructure in $p{\gamma }^{\ast }\to \Delta (1232)$ process through helicity amplitudes
• A Relativistic Model for the Electromagnetic Structure of Baryons from the 3rd Resonance Region
• Helicity amplitudes of $N(1520)$ and $N(1535)$ including pentaquark components