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

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

2005-01-14

arxiv.org/abs/hep-ph/0501116v1

Nucl.Phys.A755:395-398,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 2 figures, 1 table, Talk given at the 10th International Conference on Baryons (Baryons04), Palaiseau (France), Octob

Scientific paper

10.1016/j.nuclphysa.2005.03.044

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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