Two-meson cloud contribution to the baryon antidecuplet self-energy
arXiv:hep-ph/0501116 · doi:10.1016/j.nuclphysa.2005.03.044
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.
arXiv comment4 pages, 2 figures, 1 table, Talk given at the 10th International Conference on Baryons (Baryons04), Palaiseau (France), October 25-29, 2004
References in corpus (5)
- Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
- Evidence for Narrow S=+1 Baryon Resonance in Photo-production from Neutron
- Observation of an Exotic S = -2, Q = -2 Baryon Resonance in Proton-Proton Collisions at the CERN SPS
- The Theta+ (1540) as a heptaquark with the overlap of a pion, a kaon and a nucleon
- Is the Theta+ a K pi N bound state?