D-branes and q-deformed 2D SUSY in Pohlmeyer-Reduced Superstring Sigma Models.
Connections between string theory and gauge theory via scattering amplitudes
| Full text | |
| Author(s): |
Berkovits, Nathan
;
Green, Michael B.
;
Russo, Jorge G.
;
Vanhove, Pierre
Total Authors: 4
|
| Document type: | Journal article |
| Source: | Journal of High Energy Physics; v. N/A, n. 11, p. 21-pg., 2009-11-01. |
| Abstract | |
The constraints imposed by maximal supersymmetry on multi-loop contributions to the scattering of four open superstrings in the U(N) theory are examined by use of the pure spinor formalism. The double-trace term k(2)t(8)(trF(2))(2) (where k represents an external momentum and F the Yang-Mills field strength) only receives contributions from L <= 2 (where L is the loop number) while the single-trace term k(2)t(8)(trF(4)) receives contributions from all L. These statements are verified up to L = 5, but arguments based on supersymmetry suggest they extend to all L. This explains why the single-trace contributions to low energy maximally supersymmetric Yang-Mills field theory are more divergent in the ultraviolet than the double-trace contributions. We also comment further on the constraints on closed string amplitudes and their implications for ultraviolet divergences in N = 8 supergravity. (AU) | |
| FAPESP's process: | 04/11426-0 - Research and Instruction in String Theory |
| Grantee: | Nathan Jacob Berkovits |
| Support Opportunities: | Research Projects - Thematic Grants |