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Two-meson cloud contribution to the baryon antidecuplet self-energy

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Valencià Castellano

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Two-meson cloud contribution to the baryon antidecuplet self-energy

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Hyodo, T.; Hosaka, Atsushi; Llanes Estrada, Felipe J.; Oset Báguena, Eulogio; Peláez Sagredo, José Ramón; Vicente Vacas, Manuel José

Aquest document és un/a article, creat/da en: 2005

We study the self-energy of the SU(3) antidecuplet coming from two-meson virtual clouds. Assuming that the exotic Theta(+) belongs to an antidecuplet representation with N(1710) as nucleon partner, we derive effective Lagrangians that describe the decay of N(1710) into N pi pi with two pions in s- or p-wave. It is found that the self-energies for all members of the antidecuplet are attractive, and the larger strangeness particle is more bound. From two-meson cloud, we obtain about 20% of the empirical mass splitting between states with different strangeness.

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