Meson-baryon components in the states of the baryon decuplet
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Meson-baryon components in the states of the baryon decuplet

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Meson-baryon components in the states of the baryon decuplet

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dc.contributor.author Aceti, Francesca
dc.contributor.author Dai, L.R.
dc.contributor.author Geng, Li Sheng
dc.contributor.author Oset Báguena, Eulogio
dc.contributor.author Zhang, Yu
dc.date.accessioned 2016-04-22T09:02:58Z
dc.date.available 2016-04-22T09:02:58Z
dc.date.issued 2014
dc.identifier.uri http://hdl.handle.net/10550/52988
dc.description.abstract 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.
dc.language.iso eng
dc.relation.ispartof European Physical Journal A, 2014, vol. 50, num. 3, p. 57 - 1-57 - 11
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Aceti, Francesca Dai, L.R. Geng, Li Sheng Oset Báguena, Eulogio Zhang, Yu 2014 Meson-baryon components in the states of the baryon decuplet European Physical Journal A 50 3 57 - 1 57 - 11
dc.subject Física
dc.title Meson-baryon components in the states of the baryon decuplet
dc.type info:eu-repo/semantics/article
dc.date.updated 2016-04-22T09:02:58Z
dc.identifier.doi http://dx.doi.org/10.1140/epja/i2014-14057-2
dc.identifier.idgrec 098268

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