| Full text | |
| Author(s): |
Gomez, Humberto
;
Mafra, Carlos R.
Total Authors: 2
|
| Document type: | Journal article |
| Source: | Journal of High Energy Physics; v. N/A, n. 10, p. 26-pg., 2013-10-30. |
| Abstract | |
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) | |
| FAPESP's process: | 13/11409-7 - Twistors, Yang-Mills and Super-String theory |
| Grantee: | Humberto Gomez Zuñiga |
| Support Opportunities: | Scholarships abroad - Research Internship - Post-doctor |