A Nearly Scale Invariant Spectrum of Gravitational Radiation from Global Phase Transitions

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dc.creatorJones-Smith, Katherine
dc.creatorKrauss, Lawrence M.
dc.creatorMathur, Harsh
dc.date2007-12-05
dc.date2008-06-24
dc.date.accessioned2026-07-07T11:13:36Z
dc.date.available2026-07-07T11:13:36Z
dc.descriptionUsing a large N sigma model approximation we explicitly calculate the power spectrum of gravitational waves arising from a global phase transition in the early universe and we confirm that it is scale invariant, implying an observation of such a spectrum may not be a unique feature of inflation. Moreover, the predicted amplitude can be over 3 orders of magnitude larger than the naive dimensional estimate, implying that even a transition that occurs after inflation may dominate in Cosmic Microwave Background polarization or other gravity wave signals.
dc.description4 pages, PRL published version
dc.identifierhttps://arxiv.org/abs/0712.0778
dc.identifierhttp://arxiv.org/abs/0712.0778
dc.identifierPhys.Rev.Lett.100:131302,2008
dc.identifierdoi:10.1103/PhysRevLett.100.131302
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/191776
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titleA Nearly Scale Invariant Spectrum of Gravitational Radiation from Global Phase Transitions
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