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29 papers · 2 filters
A note on obstinate tachyons in classical dS solutions
Ulf H. Danielsson, Gary Shiu, Thomas Van Riet +1
The stabilisation of the dilaton and volume in tree-level flux compactifications leads to model independent and thus very powerful existence and stability criteria for dS solutions…
On the distribution of stable de Sitter vacua
Ulf Danielsson, Giuseppe Dibitetto
The possible existence of (meta-) stable de Sitter vacua in string theory is of fundamental importance. So far, there are no fully stable solutions where all effects are under pert…
The SU(3)-invariant sector of new maximal supergravity
A. Borghese, G. Dibitetto, A. Guarino +2
We investigate the SU(3)-invariant sector of the one-parameter family of SO(8) gauged maximal supergravity that has been recently proposed. To this end, we construct the N=2 trunca…
On Energy Functions for String-Like Continuous Curves, Discrete Chains, and Space-Filling One Dimensional Structures
Shuangwei Hu, Ying Jiang, Antti J. Niemi
The theory of string-like continuous curves and discrete chains have numerous important physical applications. Here we develop a general geometrical approach, to systematically der…
B-field in AdS(3)/CFT(2) Correspondence and Integrability
Alessandra Cagnazzo, Konstantin Zarembo
We construct topological Wess-Zumino term for supercoset sigma-models on various AdS(3) backgrounds. For appropriately chosen set of parameters, the sigma-model remains integrable…
N=(4,4) supersymmetry and T-duality
Malin Goteman
A sigma model with four-dimensional target space parametrized by chiral and twisted chiral N=(2,2) superfields can be extended to N=(4,4) supersymmetry off-shell, but this is not t…
Worldsheet Form Factors in AdS/CFT
Thomas Klose, Tristan McLoughlin
We formulate a set of consistency conditions appropriate to worldsheet form factors in the massive, integrable but non-relativistic, light-cone gauge fixed AdS(5) x S**5 string the…
Two-Loop Maximal Unitarity with External Masses
Henrik Johansson, David A. Kosower, Kasper J. Larsen
We extend the maximal unitarity method at two loops to double-box basis integrals with up to three external massive legs. We use consistency equations based on the requirement that…
Holographic three-point functions for short operators
Joseph A. Minahan
We consider holographic three-point functions for operators dual to short string states at strong coupling in N=4 super Yang-Mills. We treat the states as point-like as they come i…
Semichiral Sigma Models with 4D Hyperkaehler Geometry
Malin Göteman, Ulf Lindström, Martin Rocek
Semichiral sigma models with a four-dimensional target space do not support extended N=(4,4) supersymmetries off-shell arXiv:0903.2376, arXiv:0912.4724. We contribute towards the u…
Supersymmetric Sigma Model geometry
Ulf Lindström
This is a review of how sigma models formulated in Superspace have become important tools for understanding geometry. Topics included are: The (hyper)kähler reduction; projective s…
Large N Limit of N=2 SU(N) Gauge Theories from Localization
J. G. Russo, K. Zarembo
We study N=2 Yang-Mills theory on S^4 in the large-N limit. We find that on a large sphere Wilson loops obey a perimeter law and that the free energy grows quadratically with the r…
-behavior from 5D Yang-Mills theory
J. Kallen, J. A. Minahan, A. Nedelin +1
In this note we derive -behavior at large t' Hooft coupling for the free energy of 5D maximally supersymmetric Yang-Mills theory on . We also consider a quiver of t…
Fractional branes, warped compactifications and backreacted orientifold planes
J. Blåbäck, B. Janssen, T. Van Riet +1
The standard extremal p-brane solutions in supergravity are known to allow for a generalisation which consists of adding a linear dependence on the world-volume coordinates to the…
Ladders for Wilson Loops Beyond Leading Order
D. Bykov, K. Zarembo
We set up a general scheme to resum ladder diagrams for the quark-anti-quark potential in N=4 super-Yang-Mills theory, and do explicit calculations at the next-to-leading order. Th…
The perturbative partition function of supersymmetric 5D Yang-Mills theory with matter on the five-sphere
Johan Kallen, Jian Qiu, Maxim Zabzine
Based on the construction by Hosomichi, Seong and Terashima we consider N=1 supersymmetric 5D Yang-Mills theory with matter on a five-sphere with radius r. This theory can be thoug…
Three-dimensional (p,q) AdS superspaces and matter couplings
Sergei M. Kuzenko, Ulf Lindstrom, Gabriele Tartaglino-Mazzucchelli
We introduce N-extended (p,q) AdS superspaces in three space-time dimensions, with p+q=N and p>=q, and analyse their geometry. We show that all (p,q) AdS superspaces with X^{IJKL}=…
Global Poles of the Two-Loop Six-Point N=4 SYM integrand
Kasper J. Larsen
Recently, a recursion relation has been developed, generating the four-dimensional integrand of the amplitudes of N=4 supersymmetric Yang-Mills theory for any number of loops and l…
AKSZ construction from reduction data
Francesco Bonechi, Alejandro Cabrera, Maxim Zabzine
We discuss a general procedure to encode the reduction of the target space geometry into AKSZ sigma models. This is done by considering the AKSZ construction with target the BFV mo…
Complex Geometry and Supersymmetry
Ulf Lindstrom
I stress how the form of sigma models with (2, 2) supersymmetry differs depending on the number of manifest supersymmetries. The differences correspond to different aspects/formula…
Conformal Anomaly for Amplitudes in N=6 Superconformal Chern-Simons Theory
Till Bargheer, Niklas Beisert, Florian Loebbert +1
Scattering amplitudes in three-dimensional N=6 Chern-Simons theory are shown to be non-invariant with respect to the free representation of the osp(6|4) symmetry generators. At tre…
Six-dimensional Supergravity and Projective Superfields
William D. Linch, Gabriele Tartaglino-Mazzucchelli
We propose a superspace formulation of N=(1,0) conformal supergravity in six dimensions. The corresponding superspace constraints are invariant under super-Weyl transformations gen…
Constraining dark energy
Ulf H. Danielsson
In this paper we propose a mechanism that protects theories violating a holographic bound suggested in arXiv:1203.5476 from developing accelerated expansion. The mechanism builts o…
New Relations for Three-Dimensional Supersymmetric Scattering Amplitudes
Till Bargheer, Song He, Tristan McLoughlin
We provide evidence for a duality between color and kinematics in three-dimensional supersymmetric Chern-Simons matter theories. We show that the six-point amplitude in the maximal…