242 research outputs found
Superconformally covariant operators and super W algebras
We study superdifferential operators of order which are covariant with
respect to superconformal changes of coordinates on a compact super Riemann
surface. We show that all such operators arise from super M\"obius covariant
ones. A canonical matrix representation is presented and applications to
classical super W algebras are discussed.Comment: 23 pages, LATEX, MPI-Ph/92-66 and KA-THEP-7/9
Implications of N = 2 Superconformal Symmetry
We review recent results on the general structure of two- and three- point
functions of the supercurrent and the flavor current of N = 2 superconformal
field theories.Comment: 7 pages, latex, JHEP style, no figures; based on talks delivered at
the Workshop on Supersymmetries and Quantum Symmetries, Dubna, Russia, 26-31
Jul 1999, and at the Meeting on Quantum Aspects of Gauge Theories,
Supersymmetry and Unification, Paris, France, 1-7 Sep 199
Stringy Corrections to the Wilson Loop in N=4 Super Yang-Mills Theory
We study stringy fluctuations as a source for corrections to the Wilson loop
as obtained from the superstrings on (adS_5 x S^5)/ N=4 SYM correspondence. We
give a formal expression in terms of determinants of two dimensional operators
for the leading order correction.Comment: 14 pages, harvmac (b
Moduli Anomalies and Local Terms in the Operator Product Expansion
Local terms in the Operator Product Expansion in Superconformal Theories with
extended supersymmetry are identified. Assuming a factorized structure for
these terms their contributions are discussed.Comment: 24 pages, 2 figures, v2: footnote and reference adde
AdS_5 x S^5 Black Hole Metric at O(alpha'^3)
We compute corrections to the black hole
metric. We find that the radius of the depends on the radial
coordinate. This completes the computation of Gubser, Klebanov and Tseytlin
(hep-th/9805156). The fact that the metric no longer factorizes should modify
the value of the Wilson line at finite temperature and the glueball mass
spectrum.Comment: 7 pages, TeX (harvmac
Comments on the Algebraic Properties of Dilaton Actions
We study the relation between the dilaton action and sigma models for the
Goldstone bosons of the spontaneous breaking of the conformal group. We argue
that the relation requires that the sigma model is diffeomorphism invariant.
The origin of the WZW terms for the dilaton is clarified and it is shown that
in this approach the dilaton WZW term is necessarily accompanied by a Weyl
invariant term proposed before from holographic considerations.Comment: 19 page
Some aspects of holographic W-gravity
We use the Chern-Simons formulation of higher spin theories in three
dimensions to study aspects of holographic W-gravity. Concepts which were
useful in studies of pure bulk gravity theories, such as the Fefferman-Graham
gauge and the residual gauge transformations, which induce Weyl transformations
in the boundary theory and their higher spin generalizations, are reformulated
in the Chern-Simons language. Flat connections that correspond to conformal and
lightcone gauges in the boundary theory are considered.Comment: 42 page
Classical and super W-algebras from a zero-curvature condition
Starting from superdifferential operators in an superfield formulation,
we present a systematic prescription for the derivation of classical and
super W-algebras by imposing a zero-curvature condition on the connection
of the corresponding first order system. We illustrate the procedure on the
first non-trivial example (beyond the superconformal algebra) and also
comment on the relation with the Gelfand-Dickey construction of -algebras.Comment: 18 pages, tex, LMU-TPW 93-0
Towards metric-like higher-spin gauge theories in three dimensions
We consider the coupling of a symmetric spin-3 gauge field to
three-dimensional gravity in a second order metric-like formulation. The action
that corresponds to an SL(3,R) x SL(3,R) Chern-Simons theory in the frame-like
formulation is identified to quadratic order in the spin-3 field. We apply our
result to compute corrections to the area law for higher-spin black holes using
Wald's entropy formula.Comment: 29 pages; v2: typos correcte
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