The Maximal Amount of Gravitational Waves in the Curvaton Scenario

Article Article scientifique Article The Maximal Amount of Gravitational Waves in the Curvaton Scenario eng 2007 author Bartolo N. author Matarrese S. author Riotto Antonio Walter 650982 author Vaihkonen Antti 648670 4 p. 10.1103/PhysRevD.76.061302 1550-2368 0705.4240 The curvaton scenario for the generation of the cosmological curvature perturbation on large scales represents an alternative to the standard slow-roll scenario of inflation in which the observed density perturbations are due to fluctuations of the inflaton field itself. Its basic assumption is that the initial curvature perturbation due to the inflaton field is negligible. This is attained by lowering the energy scale of inflation, thereby highly suppressing the amount of gravitational waves produced during inflation. We compute the power-spectrum of the gravitational waves generated at second order in perturbation theory by the curvaton (isocurvature) perturbations between the end of inflation and the curvaton decay. An interesting property of this contribution to the tensor perturbations is that it is directly proportional to the amount of non-Gaussianity predicted within the curvaton scenario. We show that the spectrum of gravitational waves may be in the range of future gravitational wave detectors. Dewey 500.2 arxiv astro-ph 37 Département de physique théorique 133 false Physical review. D. Particles, fields, gravitation, and cosmology 76 061302 5f00fe10-24ed-4dc2-804a-380f43c4ab4e Article (Accepted version) Public 0705.4240v2.pdf 129834 application/pdf openAccess Faculté des sciences / Section de physique / Département de physique théorique

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The Maximal Amount of Gravitational Waves in the Curvaton Scenario	Physical review. D. Particles, fields, gravitation, and cosmology			2007	633	508

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Vaihkonen, Antti