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Nonlinear realizations and the partial breaking of extended supersymmetry

Description: In this paper we use nonlinear realizations to examine the breaking of N = 2 extended supersymmetry to N = 1. We derive Lagrangians and transformations laws for the generalized N = 2 Akulov-Volkov Goldstone field. We analyze the ghost states and show that they may be collected into N = 1 supermultiplets. We extend the transformation laws for the N = 1 chiral and vector multiplets to N = 2. Finally, we give the N = 2 generalization of an arbitrary N = 1 supersymmetric Lagrangian. 23 references.
Date: January 1, 1984
Creator: Bagger, J. A.
Partner: UNT Libraries Government Documents Department

Twisted strings and orbifolds

Description: Orbifold compactifications provide a practical approach to string symmetry breaking. They have the potential to bridge the gap between string theory and the physics of the standard model. 7 refs., 5 figs.
Date: August 1, 1986
Creator: Bagger, J. A.
Partner: UNT Libraries Government Documents Department

Supersymmetric sigma models

Description: We begin to construct the most general supersymmetric Lagrangians in one, two and four dimensions. We find that the matter couplings have a natural interpretation in the language of the nonlinear sigma model.
Date: September 1, 1984
Creator: Bagger, J.A.
Partner: UNT Libraries Government Documents Department

Supersymmetry Parameter Analysis: SPA Convention andProject

Description: High-precision analyses of supersymmetry parameters aim at reconstructing the fundamental supersymmetric theory and its breaking mechanism. A well defined theoretical framework is needed when higher-order corrections are included. We propose such a scheme, Supersymmetry Parameter Analysis SPA, based on a consistent set of conventions and input parameters. A repository for computer programs is provided which connect parameters in different schemes and relate the Lagrangian parameters to physical observables at LHC and high energy e{sup +}e{sup -} linear collider experiments, i.e., masses, mixings, decay widths and production cross sections for supersymmetric particles. In addition, programs for calculating high-precision low energy observables, the density of cold dark matter (CDM) in the universe as well as the cross sections for CDM search experiments are included. The SPA scheme still requires extended efforts on both the theoretical and experimental side before data can be evaluated in the future at the level of the desired precision. We take here an initial step of testing the SPA scheme by applying the techniques involved to a specific supersymmetry reference point.
Date: December 2, 2005
Creator: Aguilar-Saavedra, J.A.; Ali, A.; Allanach, B.C.; Arnowitt, R.; Baer, H.A.; Bagger, J.A. et al.
Partner: UNT Libraries Government Documents Department