arXiv:hep-ph/0501116·v1·High Energy Physics — Phenomenology
Two-meson cloud contribution to the baryon antidecuplet self-energy
T. Hyodo (1) · A. Hosaka (1) · F.J. Llanes-Estrada (2) · E. Oset (3) · J.R. Pelaez (2) · M. J. Vicente Vacas (3) ((1) RCNP, Osaka Univ., (2) Complutense Madrid, (3) IFIC, Valencia Univ.)
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.
Comments: 4 pages, 2 figures, 1 table, Talk given at the 10th International Conference on Baryons (Baryons04), Palaiseau (France), October 25-29, 2004