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The measurement by the BES collaboration of J/psi -> gamma p pbar decays indicates an enhancement at the p-pbar threshold. In another experiment BES finds a peak in the invariant mass of pi-mesons produced in the possibly related decay J/psi -> gamma pi+ pi- eta'. Using a semi-phenomenological potential model which describes all the N-Nbar scattering data, we show that the explanation of both effects may be given by a broad quasi-bound state in the spin and isospin singlet S wave. The structure of the observed peak is due to an interference of this quasi-bound state with a background amplitude and depends on the annihilation mechanism.

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Autor(es)

Dedonder , J. -  P. -  Loiseau , B. -  El -  Bennich , B. -  Wycech , S. - 

Id.: 70608105

Idioma: inglés  - 

Versión: 1.0

Estado: Final

Palabras clave14.40.Gx, 12.39.PN, 13.75.Cs - 

Tipo de recurso: info:eu-repo/semantics/article  -  Journal articles  - 

Tipo de Interactividad: Expositivo

Nivel de Interactividad: muy bajo

Audiencia: Estudiante  -  Profesor  -  Autor  - 

Estructura: Atomic

Coste: no

Copyright: sí

Requerimientos técnicos:  Browser: Any - 

Relación: [IsBasedOn] ISSN: 0556-2813
[IsBasedOn] EISSN: 1089-490X
[IsBasedOn] Physical Review C
[IsBasedOn] http://hal.in2p3.fr/in2p3-00458948
[IsBasedOn] Physical Review C, American Physical Society, 2009, 80, pp.045207. 〈10.1103/PhysRevC.80.045207〉
[References] info:eu-repo/semantics/altIdentifier/arxiv/ 0904.2163
[References] info:eu-repo/semantics/altIdentifier/doi/ 10.1103/PhysRevC.80.045207

Fecha de contribución: 22-mar-2018

Contacto:

Localización:
* in2p3-00458948
* DOI : 10.1103/PhysRevC.80.045207

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