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The importance of the nucleon-nucleon correlations for the eta-alpha S-wave scattering length, and the pi0-eta mixing angle in the low-energy eta-alpha scattering length model


Ceci, Saša; Hrupec, Dario; Švarc, Alfred
The importance of the nucleon-nucleon correlations for the eta-alpha S-wave scattering length, and the pi0-eta mixing angle in the low-energy eta-alpha scattering length model // Journal of Physics G: Nuclear and Particle Physics, 25 (1999), L35-L41 doi:10.1088/0954-3899/25/6/101 (podatak o recenziji nije dostupan, pismo uredniku, znanstveni)


Naslov
The importance of the nucleon-nucleon correlations for the eta-alpha S-wave scattering length, and the pi0-eta mixing angle in the low-energy eta-alpha scattering length model

Autori
Ceci, Saša ; Hrupec, Dario ; Švarc, Alfred

Izvornik
Journal of Physics G: Nuclear and Particle Physics (0954-3899) 25 (1999); L35-L41

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, pismo uredniku, znanstveni

Ključne riječi
Eta-alpha scattering length; pi0-eta mixing angle

Sažetak
Using the new set of dd-->eta alpha near- threshold experimental data, the estimate of the importance of the nucleon-nucleon correlations for the eta-alpha S-wave scattering length in the multiple scattering theory is obtained using the low-energy scattering length model. The contribution turns out to be much bigger then previously believed. Th epi0-eta mixing angle is extracted using the experimental data on the dd-->eta alpha and dd- ->pi0 alpha processes. The model is dominated by the subthreshold extrapolation recipe for the eta-alpha scattering amplitudes. When the recipe is chosen, the model is completely insensitive to the eta-alpha parameters for the subthreshold value of the eta cm momentum p(eta)2= -(0.46)fm-2. Provided that the subthreshold extrapolation is correct, a good estimate of the pi0-eta mixing angle is obtained if the experimental cross sections for the dd-->pi0 alpha reaction at the corresponding deuteron input energy is taken from the literature.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
00980202

Ustanove
Institut "Ruđer Bošković", Zagreb

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


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