2 problems

0 votes0 replies0 views
Tseytlin's non-renormalization conjecture for heterotic $R^2F^2$ terms
In the heterotic string, let $R$ denote the spacetime curvature and $F$ the gauge-field strength, so that $R^2F^2$ denotes the corresponding effective-action interaction. The conje…
Conjectureopenheterotic-string non-renormalization string-theoryarXiv posted 2 days ago
0 votes0 replies0 views
Two-loop non-renormalization conjecture for the Type II superstring $R^4$ term
For the four-graviton amplitude, let $R^4$ denote the corresponding four-curvature term in the low-energy effective action, and let two-loop order mean the genus-two contribution i…
Conjectureopennon-renormalization string-theory superstringsarXiv posted 2 days ago

Tseytlin's non-renormalization conjecture for heterotic R2F2R^2F^2R2F2 terms