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Pregled bibliografske jedinice broj: 18290

Časopis

Autori: Ceci, Saša; Hrupec, Dario; Švarc, Alfred
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
Izvornik: Journal of Physics G: Nuclear and Particle Physics (0954-3899) 25 (1999); L35-L41
Vrsta rada: pismo uredniku
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.
Projekt / tema: 00980202
Izvorni jezik: ENG
Rad je indeksiran u
bazama podataka:
Current Contents Connect (CCC)
Scopus
SCI-EXP, SSCI i/ili A&HCI
Science Citation Index Expanded (SCI-EXP) (sastavni dio Web of Science Core Collectiona)
Kategorija: Znanstveni
Znanstvena područja:
Fizika
Puni text rada: 18290.eta_alpha.pdf (tekst priložen 10. Svi. 2010. u 12:40 sati)
URL Internet adrese: http://fulir.irb.hr/1319/
http://arxiv.org/abs/nucl-th/0104038v2
http://arxiv.org/PS_cache/nucl-th/pdf/0104/0104038v2.pdf
Broj citata:
Altmetric:
DOI: 10.1088/0954-3899/25/6/101
URL cjelovitog teksta: http://fulir.irb.hr/1319/
Google Scholar: 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



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