%0 Journal Article
%T Meson-baryon components in the states of the baryon decuplet
%A Aceti, F.
%A Dai, L. R.
%A Geng, L. S.
%A Oset, E.
%A Zhang, Y.
%J European Physical Journal A
%D 2014
%V 50
%N 3
%I Springer
%@ 1434-6001
%G English
%F Aceti_etal2014
%O WOS:000333108700001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=1728), last updated on Thu, 17 Apr 2014 11:05:14 +0000
%X We apply an extension of the Weinberg compositeness condition on partial waves of L = 1 and resonant states to determine the weight of the meson-baryon component in the Delta(1232) resonance and the other members of the baryon decuplet. We obtain an appreciable weight of pi N in the Delta(1232) wave function, of the order of 60%, which looks more natural when one recalls that experiments on deep inelastic and Drell Yan give a fraction of pi N component of 34% for the nucleon. We also show that, as we go to higher energies in the members of the decuplet, the weights of the meson-baryon component decrease and they already show a dominant part for a genuine, non-meson-baryon, component in the wave function. We write a section to interpret the meaning of the Weinberg sum rule when it is extended to complex energies and another one for the case of an energy-dependent potential.
%R 10.1140/epja/i2014-14057-2
%U http://arxiv.org/abs/arXiv:1301.2554
%U https://doi.org/10.1140/epja/i2014-14057-2
%P 57 - 11pp