Showing 2007 · hep-thShow all

14 papers · 2 filters

hep-th2007★ 96 cited

A Generalized Scaling Function for AdS/CFT

Lisa Freyhult, Adam Rej, Matthias Staudacher

We study a refined large spin limit for twist operators in the sl(2) sector of AdS/CFT. We derive a novel non-perturbative equation for the generalized two-parameter scaling functi…

hep-th2007★ 27 cited

Polar supermultiplets, Hermitian symmetric spaces and hyperkahler metrics

Masato Arai, Sergei M. Kuzenko, Ulf Lindstrom

We address the construction of four-dimensional N=2 supersymmetric nonlinear sigma models on tangent bundles of arbitrary Hermitian symmetric spaces starting from projective supers…

hep-th2007★ 26 cited

Kappa-symmetry for coincident D-branes

P. S. Howe, U. Lindstrom, L. Wulff

A kappa-symmetric action for coincident D-branes is presented. It is valid in the approximation that the additional fermionic variables, used to incorporate the non-abelian degrees…

hep-th2007★ 27 cited

Factorized world-sheet scattering in near-flat AdS_5 x S^5

Valentina Giangreco Marotta Puletti, Thomas Klose, Olof Ohlsson Sax

We show the factorization of the three-particle world-sheet S-matrix of AdS_5 x S^5 superstring theory in the near-flat-space limit at one loop order. This is done by computing var…

hep-th2007★ 31 cited

T-duality and Generalized Kahler Geometry

Ulf Lindstrom, Martin Rocek, Itai Ryb +2

We use newly discovered N = (2, 2) vector multiplets to clarify T-dualities for generalized Kahler geometries. Following the usual procedure, we gauge isometries of nonlinear sigma…

hep-th2007★ 6 cited

Determinant of the SU(N) caloron with nontrivial holonomy

Sergey Slizovskiy

The 1-loop quantum weight of the SU(N) KvBLL caloron with nontrivial holonomy is calculated. The latter is the most general self-dual solution with unit topological charge in the 4…

hep-th2007★ 31 cited

Poisson sigma model on the sphere

Francesco Bonechi, Maxim Zabzine

We evaluate the path integral of the Poisson sigma model on sphere and study the correlators of quantum observables. We argue that for the path integral to be well-defined the corr…

hep-th2007★ 23 cited

New N = (2, 2) vector multiplets

Ulf Lindstrom, Martin Rocek, Itai Ryb +2

We introduce two new N = (2, 2) vector multiplets that couple naturally to generalized Kahler geometries. We describe their kinetic actions as well as their matter couplings both i…

hep-th2007★ 66 cited

World-sheet scattering in AdS_5 x S^5 at two loops

T. Klose, T. McLoughlin, J. A. Minahan +1

We study the AdS_5 x S^5 sigma-model truncated to the near-flat-space limit to two-loops in perturbation theory. In addition to extending previously known one-loop results to the f…

hep-th2007★ 18 cited

A potential for Generalized Kahler Geometry

Ulf Lindstrom, Martin Rocek, Rikard von Unge +1

We show that, locally, all geometric objects of Generalized Kahler Geometry can be derived from a function K, the "generalized Kahler potential''. The metric g and two-form B are d…

hep-th2007★ 22 cited

Linearizing Generalized Kahler Geometry

Ulf Lindstrom, Martin Rocek, Rikard von Unge +1

The geometry of the target space of an N=(2,2) supersymmetry sigma-model carries a generalized Kahler structure. There always exists a real function, the generalized Kahler potenti…

hep-th2007★ 9 cited

The Grassmannian Sigma Model in SU(2) Yang-Mills Theory

David Marsh

Spin-charge separation in pure SU(2) Yang-Mills theory was recently found to involve the dynamics of an O(3) non-linear sigma model and, seemingly, a Grassmannian non-linear sigma…

hep-th2007★ 32 cited

Zero modes for the giant magnon

J. A. Minahan

We explicitly construct the eight fermion zero mode solutions for the Hofman-Maldacena giant magnon. The solutions are naturally gauge fixed under the κ-symmetry. Substituting the…

hep-th2007★ 37 cited

Reduced sigma-model on AdS_5 x S^5: one-loop scattering amplitudes

Thomas Klose, Konstantin Zarembo

We compute one-loop S-matrix in the reduced sigma-model which describes AdS_5 x S^5 string theory in the near-flat-space limit. The result agrees with the corresponding limit of th…