| Journal: | Brazilian journal of physics |
| Database: | PERIÓDICA |
| System number: | 000344282 |
| ISSN: | 0103-9733 |
| Authors: | Scoccola, N.N1 |
| Institutions: | 1Comisión Nacional de Energía Atómica, Departamento de Física, Buenos Aires. Argentina |
| Year: | 2008 |
| Season: | Sep |
| Volumen: | 38 |
| Number: | 3B |
| Pages: | 449-454 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Conferencia o discurso |
| Approach: | Analítico, descriptivo |
| English abstract | We present results for the photoproduction helicity amplitudes of excited baryons obtained in the context of the 1=Nc expansion of QCD. The results show that, in order to get a satisfactory description of the observed photoproduction amplitudes, the sub-leading corrections in 1/Nc are important. We also find that, while onebody effective operators are dominant, there is some evidence for the need of two-body effects which, in general, are not included in quark model calculations |
| Disciplines: | Física y astronomía |
| Keyword: | Física de partículas y campos cuánticos, Fotoproducción, Bariones, Cromodinámica cuántica |
| Keyword: | Physics and astronomy, Particle physics and quantum fields, Photoproduction, Baryons, Quantum chromodynamics (QCD) |
| Full text: | Texto completo (Ver PDF) |
