Cosmological Consequences of Superconducting String Networks
نویسنده
چکیده
We consider the cosmological consequences of a network of superconducting cosmic strings. For strong enough current the period of friction domination never ends. Instead a plasma scaling solution is reached. We demonstrate that this gives rise to a very different cosmology than the usual horizon scaling solution. In particular the string network gives rise to a distinct imprint on the microwave sky, giving non-Gaussian features on much smaller angular scales. It also gives rise to a filament structure in string wakes. Because of the presence of the string magnetocylinder, the string magnetic field cannot create a primordial magnetic field. Similarly, it evades nucleosynthesis constraints. We also show that strings formed at the supersymmetry breaking scale can create the required baryon asymmetry of the universe.
منابع مشابه
Bulk viscous string cosmological models in Saez – Ballester theory of gravitation
Spatially homogeneous Bianchi type-II, VIII and IX anisotropic, as well as isotropic cosmological models can be obtained in a scalar tensor theory of gravitation proposed by Saez and Ballester (1986) when the source for energy momentum tensor is a bulk viscous fluid containing one-dimensional cosmic strings. All the models obtained and presented here are expanding, non-rotating and accelerating...
متن کاملCosmic vortons and particle physics constraints.
We investigate the cosmological consequences of particle physics theories that admit stable loops of superconducting cosmic string vortons. General symmetry breaking schemes are considered, in which strings are formed at one energy scale and subsequently become superconducting in a secondary phase transition at what may be a considerably lower energy scale. We estimate the abundances of the ens...
متن کاملCosmological Implications of Low Energy Supersymmetry Breaking Models
We show that stable local cosmic strings are a generic prediction of supersymmetric models where supersymmetry is broken at scales within a few orders of magnitude of the weak scale and is fed down to the observable sector by gauge interactions. The typical energy scale of these strings is about 102 TeV. Since in the most general and natural scenario there are two different sources of contribut...
متن کاملCosmic string network evolution in arbitrary Friedmann-Lemaı̂tre models
Cosmic strings might be responsible for structure formation in the universe. To understand how cosmic strings could influence the cosmic medium we need to know how the string network evolves. In recent years the theory was applied mainly to the Einstein–de Sitter model ~with l050 and V051), in which the network reaches a scaling behavior ~see @1,2# for a review!. However, there are observations...
متن کاملDFTT 19/95 Cosmological Solutions of Higher-Curvature String Effective Theories with Dilatons
We study the effect of higher-curvature terms in the string low-energy effective actions on the cosmological solutions of the theory, up to corrections quartic in the curvatures, for the bosonic and heterotic strings as well as for the type II superstring. We find that cosmological solutions exist for all string types but they always disappear when the dilaton field is included, a conclusion th...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2008