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RESEARCH PRODUCT
Coleman-Weinberg inflation in light of Planck
Eung Jin ChunHyun Min LeeGabriela Barenboimsubject
High Energy Physics - TheoryPhysicsNuclear and High Energy PhysicsCosmology and Nongalactic Astrophysics (astro-ph.CO)Electroweak interactionFOS: Physical sciencesFísicaAstrophysics::Cosmology and Extragalactic AstrophysicsInflatonCosmologyHigh Energy Physics - Phenomenologysymbols.namesakeTheoretical physicsGeneral Relativity and Quantum CosmologyHigh Energy Physics - Phenomenology (hep-ph)High Energy Physics - Theory (hep-th)Randall–Sundrum modelQuantum electrodynamicsQuartic functionsymbolsSymmetry breakingPlanckAstrophysics - Cosmology and Nongalactic AstrophysicsHubble's lawdescription
We revisit a single field inflationary model based on Coleman-Weinberg potentials. We show that in small field Coleman-Weinberg inflation, the observed amplitude of perturbations needs an extremely small quartic coupling of the inflaton, which might be a signature of radiative origin. However, the spectral index obtained in a standard cosmological scenario turns out to be outside the 2 sigma region of the Planck data. When a non-standard cosmological framework is invoked, such as brane-world cosmology in the Randall-Sundrum model, the spectral index can be made consistent with Planck data within 1 sigma, courtesy of the modification in the evolution of the Hubble parameter in such a scheme. We also show that the required inflaton quartic coupling as well as a phenomenologically viable B-L symmetry breaking together with a natural electroweak symmetry breaking can arise dynamically in a generalized B-L extension of the Standard Model where the full potential is assumed to vanish at a high scale.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-01-01 |