Two-meson cloud contribution to the baryon antidecuplet binding | Zendy

Atsushi Hosaka | Zendy; Tetsuo Hyodo | Zendy; Felipe J. Llanes–Estrada | Zendy; E. Oset | Zendy; J. R. Peláez | Zendy; M. J. Vicente Vacas | Zendy

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Two-meson cloud contribution to the baryon antidecuplet binding

Author(s) -

Atsushi Hosaka,

Tetsuo Hyodo,

Felipe J. Llanes–Estrada,

E. Oset,

J. R. Peláez,

M. J. Vicente Vacas

Publication year - 2005

Publication title -

physical review c

Language(s) - English

Resource type - Journals

eISSN - 1089-490X

pISSN - 0556-2813

DOI - 10.1103/physrevc.71.045205

Subject(s) - pentaquark , physics , strangeness , pion , particle physics , meson , baryon , nuclear physics , binding energy , isospin , nucleon , branching fraction

We study the two-meson virtual cloud contribution to the self-energy of theSU(3) antidecuplet, to which the Theta+ pentaquark is assumed to belong. Thisis motivated by the large branching ratio of the N(1710) decay into two pionsand one nucleon. We derive effective Lagrangians that describe the N(1710)decay into N-pi-pi with two pions in s or p wave. We obtain increased bindingfor all members of the antidecuplet and a contribution to the mass splittingbetween states with different strangeness which is at least 20 % of theempirical one. We also provide predictions for three-body decays of thepentaquark antidecuplet.Comment: 13 pages, To appear in Phys. Rev.

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