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Your search keyword '"Bergshoeff, E"' showing total 5 results
Start Over Author "Bergshoeff, E" Topic supersymmetry
5 results on '"Bergshoeff, E"'

1. Exact duality in the string effective action

Author

Bergshoeff, E, Entrop, I, Kallosh, R, Entrop, Ingeborg, and Van Swinderen Institute for Particle Physics and G

Subjects
High Energy Physics - Theory, CURRENTS, FOS: Physical sciences, 01 natural sciences, High Energy Physics::Theory, 10 DIMENSIONS, Quantum mechanics, 0103 physical sciences, Strong duality, SUPERGRAVITY, Spin connection, 010306 general physics, Effective action, SUPERSYMMETRY, Mathematical physics, Physics, SIGMA-MODELS, Duality gap, 010308 nuclear & particles physics, String field theory, 16. Peace & justice, FIELDS, Weak duality, Non-critical string theory, High Energy Physics - Theory (hep-th), SYMMETRIES, SOLITONS, SCALE FACTOR DUALITY, String duality
Abstract

We formulate sigma-model duality transformations in terms of spin connection. This allows to investigate the symmetry of the string action including higher order $\alpha'$ corrections. An important feature of the new duality transformations is a simple homogeneous transformation rule of the spin connection (with torsion) and specifically adjusted transformation of the Yang-Mills field. We have found that under certain conditions this duality is a symmetry of the full effective string action in the target space, free of $\alpha'$ corrections. We demonstrate how the exact duality generates new fundamental string solutions from supersymmetric string waves., Comment: 23 p, Stanford University preprint SU-ITP-93-37 (some references added)

Published
1994

2. Brane plus bulk supersymmetry in ten dimensions.

Author

Bergshoeff, E., Kallosh, R., Ortı´n, T., Roest, D., and Van Proeyen, A.

Subjects
*SUPERSYMMETRY, *SUPERGRAVITY, *FIELD theory (Physics), *BRANES
Abstract

We discuss a generalized form of IIA/IIB supergravity depending on all R-R potentials C[SUP(p)] (p = 0, 1,... 9) as the effective field theory of Type IIA/IIB superstring theory. For the IIA case we explicitly break this R-R democracy to either p ≤ 3 or p ≥ 5 which allows us to write a new bulk action that can be coupled to N = 1 supersymmetric brane actions. The case of 8-branes is studied in detail using the new bulk & brane action. The supersymmetric negative tension branes without matter excitations can be viewed as orientifolds in the effective action. These D8-branes and O8-planes are fundamental in Type I′ string theory. A BPS 8-brane solution is given which satisfies the jump conditions on the wall. As an application of our results we derive a quantization of the mass parameter and the cosmological constant in string units. [ABSTRACT FROM AUTHOR]

Published
2001

4. Superconformal sigma models in three dimensions

Author

Bergshoeff, E., Cecotti, S., Samtleben, H., and Sezgin, E.

Subjects
*SIGMA particles, *SUPERSYMMETRY, *SASAKIAN manifolds, *SPINOR analysis, *SUPERGRAVITY, *FIELD theory (Physics), *CONFORMATIONAL analysis
Abstract

Abstract: We construct superconformal gauged sigma models with extended rigid supersymmetry in three dimensions. Those with have necessarily flat targets, but the models with admit non-flat targets, which are cones with appropriate Sasakian base manifolds. Superconformal symmetry also requires that the three-dimensional spacetimes admit conformal Killing spinors which we examine in detail. We present explicit results for the gauged superconformal theories for . In particular, we gauge a suitable subgroup of the isometry group of the cone in a superconformal way. We finally show how these sigma models can be obtained from Poincaré supergravity. This connection is shown to necessarily involve a subset of the auxiliary fields of supergravity for . [Copyright &y& Elsevier]

Published
2010
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