6533b829fe1ef96bd128a3b3
RESEARCH PRODUCT
Two-meson cloud contribution to the baryon antidecuplet binding
Tetsuo HyodoJosé R. PeláezFelipe J. Llanes-estradaM. J. Vicente VacasAtsushi HosakaEulogio Osetsubject
PhysicsNuclear and High Energy PhysicsParticle physicsMesonBranching fractionHigh Energy Physics::LatticeNuclear TheoryQuark modelFOS: Physical sciencesFísicaStrangenessPentaquarkNuclear physicsBaryonHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)PionHigh Energy Physics::ExperimentNuclear ExperimentNucleondescription
We study the two-meson virtual cloud contribution to the self-energy of the SU(3) antidecuplet, to which the Theta+ pentaquark is assumed to belong. This is motivated by the large branching ratio of the N(1710) decay into two pions and 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 binding for all members of the antidecuplet and a contribution to the mass splitting between states with different strangeness which is at least 20 % of the empirical one. We also provide predictions for three-body decays of the pentaquark antidecuplet.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2004-11-23 | Physical Review C |