Solving the $η$-Problem in Hybrid Inflation with Heisenberg Symmetry and Stabilized Modulus

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dc.creatorAntusch, Stefan
dc.creatorBastero-Gil, Mar
dc.creatorDutta, Koushik
dc.creatorKing, Steve F.
dc.creatorKostka, Philipp M.
dc.date2008-08-18
dc.date2009-01-27
dc.date.accessioned2026-07-07T12:37:28Z
dc.date.available2026-07-07T12:37:28Z
dc.descriptionWe propose a class of models in which the $η$-problem of supersymmetric hybrid inflation is resolved using a Heisenberg symmetry, where the associated modulus field is stabilized and made heavy with the help of the large vacuum energy during inflation without any fine-tuning. The proposed class of models is well motivated both from string theory considerations, since it includes the commonly encountered case of no-scale supergravity Kaehler potential, and from the perspective of particle physics since a natural candidate for the inflaton in this class of models is the right-handed sneutrino which is massless during the inflationary epoch, and subsequently acquires a large mass at the end of inflation. We study a specific example motivated by sneutrino hybrid inflation with no-scale supergravity in some detail, and show that the spectral index may lie within the latest WMAP range, while the tensor-to-scalar ratio is very small.
dc.description27 pages, 4 figures; appendix and reference added; version published in JCAP
dc.identifierhttps://arxiv.org/abs/0808.2425
dc.identifierhttp://arxiv.org/abs/0808.2425
dc.identifierJCAP 0901:040,2009
dc.identifierdoi:10.1088/1475-7516/2009/01/040
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/218448
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Theory
dc.titleSolving the $η$-Problem in Hybrid Inflation with Heisenberg Symmetry and Stabilized Modulus
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