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24 papers · 2 filters
Zero Modes and Conformal Anomaly in Liouville Vortices
G. Nardelli, M. Peloso
The partition function of a two dimensional Abelian gauge model reproducing magnetic vortices is discussed in the harmonic approximation. Classical solutions exhibit conformal inva…
Evidence for Nonvanishing Cosmological Constant in NonSusy Superstring Models
Roberto Iengo, Chuan-Jie Zhu
We reanalyse the computation of the cosmological constant at two loops in recently proposed Superstring models without massless gravitini, both in the theta-function based form…
Fivebrane instantons and higher derivative couplings in type I theory
Amine B. Hammou, Jose F. Morales
We express the infinite sum of D-fivebrane instanton corrections to couplings in type I string vacua, in terms of an elliptic index counting 1/2-BPS excit…
Instantons in Superconformal Gauge Theories and the AdS/CFT Correspondence
E. Gava, K. S. Narain, M. H. Sarmadi
We study, using ADHM construction, instanton effects in an ${\CN}=2$ superconformal gauge theory, arising as effective field theory on a system of D-3-branes near an or…
Symmetric Potentials of Gauged Supergravities in Diverse Dimensions and Coulomb Branch of Gauge Theories
M. Cvetic, S. S. Gubser, H. Lu +1
A class of conformally flat and asymptotically anti-de Sitter geometries involving profiles of scalar fields is studied from the point of view of gauged supergravity. The scalars i…
3D superconformal theories from Sasakian seven-manifolds: new nontrivial evidences for AdS_4/CFT_3
Davide Fabbri, Pietro Fre', Leonardo Gualtieri +4
In this paper we discuss candidate superconformal N=2 gauge theories that realize the AdS/CFT correspondence with M--theory compactified on the homogeneous Sasakian 7-manifolds M^7…