Charge-exchange isobaric resonances

Rho-Nucleon Tensor Coupling and Charge-Exchange Resonances

The Gamow-Teller resonances are discussed in the context of a selfconsistent RPA, based on the relativistic mean field theory. We inquire on the possibility of substituting the phenomenological Landau-Migdal force by a microscopic nucleon-nucleon interaction, generated from the rho-nucleon tensor coupling. The effect of this coupling turns out to be very small when the short range correlations ...

Excitation of Giant Resonances in Pion Charge-exchange Reactions

Widths of Isobaric Analog Resonances: a microscopic approach

A self-consistent particle-phonon coupling model is used to investigate the properties of the isobaric analog resonance in 208Bi. It is shown that quantitative agreement with experimental data for the energy and the width can be obtained if the effects of isospin-breaking nuclear forces are included, in addition to the Coulomb force effects. A connection between microscopic model predictions an...

Space Charge Effects - Tune Shifts and Resonances

Resonances in the Presence of the Space Charge Force . . . . . . 3.1 Equations of Motion . . . ; . . . . . . . . . . . . . . . . . 3.2 Amplitude Dependence of the Tune . . . . . . . . . . . . . 3.3 Particle Behavior under Resonance and Space Charge Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . 3.4 Resonance Phase Space Structure with No Space Charge . . 3.5 Resonance Phase Spac...

Exchange Currents in Photoproduction of Baryon Resonances

We calculate photoexcitation amplitudes for all nucleon and ∆ resonances up to √ s=1.6 GeV. We use a chiral quark model including two-body exchange currents. The two-body currents give important contributions. For the ∆(1232) and the D13(1520) we observe that the individual exchange current contributions considerably cancel each other while for the P11(1440), the P33(1600), and the S11(1535) we...