Phys. Rev. Lett. 63, 2625–2628 (1989)Global texture as the origin of cosmic structureReceived 3 November 1989; published in the issue dated 11 December 1989 If a unified theory possesses non-Abelian global symmetries which are spontaneously broken it gives rise to a three-dimensional defect known as texture. In an expanding universe texture obeys a ‘‘scaling solution,’’ which produces a constant density perturbation at horizon crossing of δρ/ρ≊mGUT2/mPlanck2, where mGUT is the scale of symmetry breaking. These (isocurvature) perturbations are broadly of Harrison-Zeldovich form, but are non-Gaussian, having strong ‘‘spikes’’ in the density field. Consequences for microwave background anisotropy are briefly discussed. © 1989 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.63.2625
DOI:
10.1103/PhysRevLett.63.2625
PACS:
98.80.Cq, 12.10.Dm
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.