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Confronting hybrid inflation in supergravity with CMB data

Rachel Jeannerot·Marieke Postma
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Abstract

$F$-term GUT inflation coupled to N=1 Supergravity is confronted with CMB data. Corrections to the string mass-per-unit-length away from the Bogomolny limit are taken into account. We find that a superpotential coupling $10^{-7}/\mcN \lesssim κ\lesssim 10^{-2}/\mcN$, with $\mcN$ the dimension of the Higgs-representation, is still compatible with the data. The parameter space is enlarged in warm inflation, as well as in the curvaton and inhomogeneous reheat scenario. $F$-strings formed at the end of $P$-term inflation are also considered. Because these strings satisfy the Bogomolny bound the bounds are stronger: the gauge coupling is constrained to the range $10^{-7} < g <10^{-4}$.

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Rachel Jeannerot, Marieke Postma. 2005-03-15. Confronting hybrid inflation in supergravity with CMB data. https://doi.org/10.1088/1126-6708%2F2005%2F05%2F071

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