https://doi.org/10.1051/epjconf/20147304018
A covariant model for the γ∗N → N∗(1520) reaction
1 International Institute of Physics, Federal University of Rio Grande do Norte, Av. Odilon Gomes de Lima 1722, Capim Macio, Natal-RN 59078-400, Brazil
2 CFTP, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
a e-mail: gilberto.ramalho2013@gmail.com
Published online: 9 June 2014
We apply the covariant spectator quark model to the study of the electromagnetic structure of the N∗(1520) state (Jp = 3-/2), an important resonance from the second resonance region in both spacelike and timelike regimes. The contributions from the valence quark effects are calculated for the γ∗N → N∗(1520) helicity amplitudes. The results are used to parametrize the meson cloud dominant at low Q2.
© Owned by the authors, published by EDP Sciences, 2014
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