Contribution of sea quarks to the electromagnetic decay of decuplet baryons

Abstract

In this work, we study briefly the electromagnetic dipole transitions from decuplet to octet S-wave baryons, where the current experimental data for the radiative decay width shows that these values are approximately two times larger than the predictions of the constituent quark model. The main aim is to solve this problem with the approach of effective degrees of freedom for quarks in the quark model, considering also the sea quarks, obtaining the valence and the sea quarks contributions. In order to do this, an unquenched quark model has been considered where the effects of the quark-antiquark pairs are incorporated as a perturbation with the quantum numbers of vacuum in the wave function for baryons as baryonmeson intermediate coupled states with the quantum numbers of the initial baryon through the 3P0 model. Also, an extended expression has been obtained to the Ml electromagnetic transition that gives a closer value to the actual experimental data due to the sea quark core contribution.