Octet to decuplet electromagnetic transition in a relativistic quark model

Abstract

We study the octet to decuplet baryon electromagnetic transitions using the covariant spectator quark model, and predict the transition magnetic dipole form factors for those involving the strange baryons. Utilizing SU(3) symmetry, the valence quark contributions are supplemented by the pion cloud dressing based on the one estimated in the ${\gamma }^{\ast }N\to \Delta$ reaction. Although the valence quark contributions are dominant in general, the pion cloud effects turn out to be very important to describe the experimental data. We also show that, other mesons besides the pion in particular the kaon, may be relevant for some reactions such as ${\gamma }^{\ast }{\Sigma }^{+}\to {\Sigma }^{\ast +}$, based on our analysis for the radiative decay widths of the strange decuplet baryons.

Published in PRD. Version accepted for publication. 18 pages, 7 figures and 11 tables

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• ${\gamma }^{\ast }N\to N^{\ast }(1520)$ form factors in the timelike regime
• Using the Single Quark Transition Model to predict nucleon resonance amplitudes
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• Semirelativistic approximation to the ${\gamma }^{\ast }N\to N(1520)$ and ${\gamma }^{\ast }N\to N(1535)$ transition form factors
• $N^{\ast }$ Form Factors based on a Covariant Quark Model
• Electromagnetic form factors of the ${\Omega }^{-}$ baryon in the spacelike and timelike regions
• Covariant model for the Dalitz decay of the $N(1535)$ resonance
• Transition magnetic moments of $J^P={\frac{3}{2}}^{+}$ decuplet to $J^P={\frac{1}{2}}^{+}$ octet baryons in the chiral constituent quark model
• A covariant model for the decuplet to octet Dalitz decays
• Octet baryon electromagnetic form factor double ratios $(G_E^{\ast }/G_M^{\ast })/(G_E/G_M)$ in a nuclear medium
• Electromagnetic $|G_E/G_M|$ ratios of hyperons at large timelike $q^2$
• Measurement of {\boldmath $J/\psi \to \Xi (1530{)}^{-}{\bar{\Xi }}^{+}$} and evidence for the radiative decay {\boldmath $\Xi (1530{)}^{-}\to \gamma {\Xi }^{-}$}
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• Combined parametrization of the neutron electric form factor and the ${\gamma }^{\ast }N\to \Delta (1232)$ quadrupole form factors
• Weak interaction axial form factors of the octet baryons in nuclear medium
• Electromagnetic transitions among octet and decuplet baryons in QCD
• Meson cloud contributions to the Dalitz decays of decuplet to octet baryons
• Electroweak form factors of baryons in dense nuclear matter
• Study of Electromagnetic Properties of Light Baryons in the Hypercentral Approach
• Sea contribution to the charge radii and quadrupole moment of $J^P={\frac{1}{2}}^{+},{\frac{3}{2}}^{+}$ baryons
• Quark model calculations of transition form factors at high photon virtualities
• A covariant model for the negative parity resonances of the nucleon
• A Relativistic Model for the Electromagnetic Structure of Baryons from the 3rd Resonance Region
• Octet baryon electroweak form factors in dense nuclear matter
• Electric and magnetic timelike form factors of hyperons at large transfer momentum