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Fayet-Iliopoulos Terms in Supergravity and Cosmology

Abstract : We clarify the structure of N=1 supergravity in 1+3 dimensions with constant FI terms. The FI terms induce non-vanishing R-charges for the fermions and the superpotential. Therefore the D-term inflation model in supergravity with constant FI terms has to be revisited. We also investigate the case of the so-called anomalous U(1) when a chiral superfield is shifted under U(1). In such a case, in the context of string theory, the FI terms originate from the derivative of the Kaehler potential and they are inevitably field-dependent. This raises an issue of stabilization of the relevant field in applications to cosmology. The recently suggested equivalence between the D-term strings and D-branes of type II theory shows that brane-anti-brane systems produce FI terms in the effective 4d theory, with the Ramond-Ramond axion shifting under the U(1) symmetry. This connection gives the possibility to interpret many unknown properties of D-\bar{D} systems in the more familiar language of 4d supergravity D-terms, and vice versa. For instance, the shift of the axion field in both cases restricts the possible forms of the moduli-stabilizing superpotential. We provide some additional consistency checks of the correspondence of D-term-strings to D-branes and show that instabilities of the two are closely related. Surviving cosmic D-strings of type II theory may be potentially observed in the form of D-term strings of 4d supergravity.
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http://hal.in2p3.fr/in2p3-00023479
Contributor : Simone Lantz Connect in order to contact the contributor
Submitted on : Friday, December 17, 2004 - 4:33:19 PM
Last modification on : Wednesday, October 21, 2020 - 4:32:13 PM

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P. Binetruy, G. Dvali, R. Kallosh, A. van Proeyen. Fayet-Iliopoulos Terms in Supergravity and Cosmology. Classical and Quantum Gravity, IOP Publishing, 2004, 21, pp.3137-3170. ⟨10.1088/0264-9381/21/13/005⟩. ⟨in2p3-00023479⟩

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