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8 papers · 2 filters
Flux-induced isometry gauging in heterotic strings
Wu-yen Chuang, Peng Gao
We study the effect of flux-induced isometry gauging of the scalar manifold in N=2 heterotic string compactification with gauge fluxes. We show that a vanishing theorem by Witten p…
Reheating Metastable O'Raifeartaigh Models
Nathaniel J. Craig, Patrick J. Fox, Jay G. Wacker
In theories with multiple vacua, reheating to a temperature greater than the height of a barrier can stimulate transitions from a desirable metastable vacuum to a lower energy stat…
Is N = 8 Supergravity Ultraviolet Finite?
Zvi Bern, Lance J. Dixon, Radu Roiban
Conventional wisdom holds that no four-dimensional gravity field theory can be ultraviolet finite. This understanding is based mainly on power counting. Recent studies confirm that…
Nothing for Branes
Daniel Green
Recent work on closed string tachyon condensation suggests the existence of a `nothing state' where closed strings and space itself vanish. We consider the evolution of D-branes in…
The Four-Loop Planar Amplitude and Cusp Anomalous Dimension in Maximally Supersymmetric Yang-Mills Theory
Zvi Bern, Michael Czakon, Lance J. Dixon +2
We present an expression for the leading-color (planar) four-loop four-point amplitude of N=4 supersymmetric Yang-Mills theory in 4-2 e dimensions, in terms of eight separate integ…
Axions In String Theory
Peter Svrcek, Edward Witten
In the context of string theory, axions appear to provide the most plausible solution of the strong CP problem. However, as has been known for a long time, in many string-based mod…