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

Authors :: Hyodo, T.
Hosaka, A.
Llanes-Estrada, F. J.
Oset, E.
Pelaez, J. R.
Vacas, M. J. Vicente
Hyodo, T.
Hosaka, A.
Llanes-Estrada, F. J.
Oset, E.
Pelaez, J. R.
Vacas, M. J. Vicente
Publication Year :: 2005
Abstract: 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.<br />Comment: 4 pages, 2 figures, 1 table, Talk given at the 10th International Conference on Baryons (Baryons04), Palaiseau (France), October 25-29, 2004