Consistent supersymmetric decoupling in cosmology

Leiden Repository

Consistent supersymmetric decoupling in cosmology

Title: Consistent supersymmetric decoupling in cosmology
Author: Sousa Sánchez, Kepa
Publisher: Lorentz Institute of Theoretical Physics, Faculty of Science, Leiden University
Issue Date: 2012-06-20
Keywords: BPS
Cosmic strings
Cosmology
Decoupling
Moduli
Stability
Supergravity
Supersymmetry
Truncation
Abstract: The present work discusses several problems related to the stability of ground states with broken supersymmetry in supergravity, and to the existence and stability of cosmic strings in various supersymmetric models. In particular we study the necessary conditions to truncate consistently a sector of an N=1 supergravity theory while preserving supersymmetry, and on those models where these conditions are met we discuss how the breaking of supersymmetry in the light sector affects the stability of the truncated fields. In this thesis we also present a new type of supersymmetric cosmic string solutions in N = 2 supergravity. The corresponding model admits a family of cosmic string solutions with the same energy but different core radius. We study the stability of these strings against perturbations in a cosmological context, where the zero mode connecting different solutions within a family could be excited, leading to the spread of the magnetic flux and the disappearence of the string.
Description: Promotor: A. Achúcarro
With summary in Dutch
Faculty: Faculteit der Wiskunde en Natuurwetenschappen
Citation: Sousa Sánchez, K., 2012, Doctoral thesis, Leiden University
Series/Report no.: Casimir PhD Series Delft-Leiden;2012-16
ISBN: 9789085931270
Sponsor: - Basque Government through the grant BFI04.203. - Dutch Organization for Scientific Research (N.W.O.) via the VICI grant 680-47-320. -The department of Theoretical Physics and History of Science at the University of the Basque Country.
Handle: http://hdl.handle.net/1887/19115
 

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application/pdf Chapter 1 Introduction 626.7Kb View/Open
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application/pdf Bibliography 187.4Kb View/Open
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