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8 papers · 1 filter
Subleading-color contributions to gluon-gluon scattering in N=4 SYM theory and relations to N=8 supergravity
Stephen G. Naculich, Horatiu Nastase, Howard J. Schnitzer
We study the subleading-color (nonplanar) contributions to the four-gluon scattering amplitudes in N=4 supersymmetric SU(N) Yang-Mills theory. Using the formalisms of Catani and of…
Two-loop graviton scattering relation and IR behavior in N=8 supergravity
Stephen G. Naculich, Horatiu Nastase, Howard J. Schnitzer
We derive an ABDK-like relation between the one- and two-loop four-graviton amplitudes in N=8 supergravity. Specifically we show that the infrared divergent part of the two-loop am…
Quark scattering amplitudes at strong coupling
John McGreevy, Amit Sever
Following Alday and Maldacena, we describe a string theory method to compute the strong coupling behavior of the scattering amplitudes of quarks and gluons in planar N=2 super Yang…
Regge behavior of gluon scattering amplitudes in N=4 SYM theory
Stephen G. Naculich, Howard J. Schnitzer
It is shown that the four-gluon scattering amplitude for N=4 supersymmetric Yang-Mills theory in the planar limit can be written, in both the weak- and strong-coupling limits, as a…
Scattering of twist fields from D-branes and orientifolds
Albion Lawrence, Amit Sever
We compute the two-point function for Z_N orbifold twist fields on the disk and RP2. We apply this to a computation of the O(g_s) correction to the Kahler potential for (the symmet…
Dimensional Duality
Daniel Green, Albion Lawrence, John McGreevy +2
We show that string theory on a compact negatively curved manifold, preserving a U(1)^{b_1} winding symmetry, grows at least b_1 new effective dimensions as the space shrinks. The…