| Texto completo | |
| Autor(es): |
Gomez, Humberto
;
Mafra, Carlos R.
Número total de Autores: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of High Energy Physics; v. N/A, n. 10, p. 26-pg., 2013-10-30. |
| Resumo | |
The low energy limit of the closed-string 3-loop amplitude (including its overall coefficient) is computed for four external massless states using the pure spinor formalism and the result is compared with a prediction of Green and Vanhove based on SL(2, Z) duality. Agreement is found provided the three-loop amplitude prescription includes a symmetry factor 1/3. We argue for its inclusion in order to compensate a Z(3) symmetry present in genus-three Riemann surfaces. (AU) | |
| Processo FAPESP: | 07/54623-8 - Aspectos matematicos de spinores puros. |
| Beneficiário: | Humberto Gomez Zuñiga |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 13/11409-7 - Twistors, Yang-Mills e teoria de supercordas |
| Beneficiário: | Humberto Gomez Zuñiga |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado |