Hybrid inflation in supergravity with \((\text{SU}(1,1)/\text{U}(1))^m\) Kähler manifolds

DOI10.1016/S0370-2693(99)00688-7zbMATH Open0992.83089arXivhep-ph/9904284OpenAlexW2082729624MaRDI QIDQ5934572

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Publication date: 7 May 2001

Published in: (Search for Journal in Brave)

Abstract: In the presence of fields without superpotential but with large vevs through D-terms the mass-squared of the inflaton in the context of supergravity hybrid inflation receives positive contributions which could cancel the possibly negative K$ddota$hler potential ones. The mechanism is demonstrated using K$ddota$hler potentials associated with products of $SU(1,1)/U(1)$ K$ddota$hler manifolds. In a particularly simple model of this type all supergravity corrections to the F-term potential turn out to be proportional to the inflaton mass allowing even for an essentially completely flat inflationary potential. The model also allows for a detectable gravitational wave contribution to the microwave background anisotropy. Its initial conditions are quite natural largely due to a built in mechanism for a first stage of ``chaotic D-term inflation.

Full work available at URL: https://arxiv.org/abs/hep-ph/9904284

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