Two-meson cloud contribution to the baryon antidecuplet binding



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Llanes Estrada, Felipe José and Peláez Sagredo, José Ramón and Vicente Vacas, M.J. and Oset, E and Hosaka, A and Hyodo, T (2005) Two-meson cloud contribution to the baryon antidecuplet binding. Physical Review C, 71 (4). ISSN 0556-2813

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We study the two-meson virtual cloud contribution to the self-energy of the SU(3) antidecuplet, to which the Thet (+) 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.

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© 2005 The American Physical Society.
This work is supported by the Japan-Europe (Spain) Research Cooperation Program of Japan Society for the Promotion of Science (JSPS) and Spanish Council for Scientific Research (CSIC), which enabled E.O. and M.J.V.V. to visit RCNP, Osaka. This work is partly supported by DGICYT Contract Numbers BFM2003-00856, FPA 2000-0956, and BFM 2002-01003 and the E.U. EURIDICE Network Contract No. HPRN-CT-2002 00311.

Uncontrolled Keywords:Chiral Perturbation-Theory, Pentaquark, Theta(+), Dynamics
Subjects:Sciences > Physics
ID Code:23259
Deposited On:22 Oct 2013 18:47
Last Modified:12 Feb 2015 08:41

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