Published April 1981
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Dibaryon resonances and the pion deuteron cross section
Description
The contributions of isospin one dibaryon resonances to the elastic πd forward amplitude are evaluated. These terms are added to the amplitudes obtained from the multiple scattering series, and the results compared, through the optical theorem, to the accurate experimental data on total πd cross section. It is shown that the dibaryon contributions improve the theoretical description of the data; information is obtained on the partial widths of the 1D2(2140 MeV) and 3F3(2260 MeV) dibaryons. It is shown also that the contribution of a 3P1(2060 MeV) state, which has been predicted but not yet observed, improves significantly the theoretical results in the low energy range. (Author)
Availability note (English)
MF available from INIS under the Report Number.Abstract (Portuguese)
Calculam-se as contribuicoes de ressonancias dibarionicas de isospin um para a amplitude elastica πd na direcao frontal. Estes termos sao adicionados as amplitudes obtidas pela serie de espalhamento multiplo, e os resultados sao comparados, atraves do teorema otico, com os dados experimentais de alta precisao para a secao de choque total da colisao πd. Mostra-se que as contribuicoes dos dibarions melhoram a descricao teorica dos dados, e obtem-se informacoes sobre as larguras parciais dos dibarions 1D2(2140 MeV) e 3F3(2260 MeV). Mostra-se tambem que a contribuicao de um estado 3P1(2060 MeV), o qual foi predito mas ainda nao observado, melhora acentuadamente os resultados teoricos na regiao das baixas energias. (Autor)Files
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Additional details
Publishing Information
- Imprint Pagination
- 18 p.
- Report number
- PUC-TN--05/81
INIS
- Country of Publication
- Brazil
- Country of Input or Organization
- Brazil
- INIS RN
- 13701566
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- BARYON RESONANCES; COMPARATIVE EVALUATIONS; DEUTERIUM TARGET; ELASTIC SCATTERING; ISOSPIN; PION REACTIONS; SCATTERING AMPLITUDES; THEORETICAL DATA; TOTAL CROSS SECTIONS
- Descriptors DEC
- AMPLITUDES; BARYONS; CROSS SECTIONS; DATA; ELEMENTARY PARTICLES; FERMIONS; HADRON REACTIONS; HADRONS; INFORMATION; MESON REACTIONS; NUCLEAR REACTIONS; NUMERICAL DATA; PARTICLE PROPERTIES; RESONANCE PARTICLES; SCATTERING; TARGETS