martes, 28 de mayo de 2013

Inflationary paradigm in trouble after Planck2013

The recent Planck satellite combined with earlier results eliminate a wide spectrum of more complex inflationary models and favor models with a single scalar field, as reported in the analysis of the collaboration. More important, though, is that all the simplest inflaton models are disfavored by the data while the surviving models -- namely, those with plateau-like potentials -- are problematic. We discuss how the restriction to plateau-like models leads to three independent problems: it exacerbates both the initial conditions problem and the multiverse-unpredictability problem and it creates a new difficulty which we call the inflationary "unlikeliness problem." Finally, we comment on problems reconciling inflation with a standard model Higgs, as suggested by recent LHC results. In sum, we find that recent experimental data disfavors all the best-motivated inflationary scenarios and introduces new, serious difficulties that cut to the core of the inflationary paradigm. Forthcoming searches for B-modes, non-Gaussianity and new particles should be decisive.
Subjects:Cosmology and Extragalactic Astrophysics (astro-ph.CO); High Energy Physics - Phenomenology (hep-ph); High Energy Physics - Theory (hep-th)
Cite as:arXiv:1304.2785 [astro-ph.CO]
 (or arXiv:1304.2785v1 [astro-ph.CO] for this version)

Submission history

From: Anna Ijjas [view email]
[v1] Tue, 9 Apr 2013 20:15:58 GMT (253kb)



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Jorge Poveda
Fri May 24 23:28:12 2013
arXiv e-prints database