Abstract
We construct a no-scale model of inflation with a single modulus whose real and imaginary parts are fixed by simple power-law corrections to the no-scale K{\" a}hler potential. Assuming an uplift of the minimum of the effective potential, the model yields a suitable number of e-folds of expansion and values of the tilt in the scalar cosmological density perturbations and of the ratio of tensor and scalar perturbations that are compatible with measurements of the cosmic microwave background radiation.
Highlights
Cosmological inflation [1,2,3,4] provides one of the most promising arenas for probing physics close to the Planck scale, potentially even providing a window onto string theory
Assuming an uplift of the minimum of the effective potential, the model yields a suitable number of e-folds of expansion and values of the tilt in the scalar cosmological density perturbations and of the ratio of tensor and scalar perturbations that are compatible with measurements of the cosmic microwave background radiation
We have presented in this paper a simple scenario for fixing both components of the modulus T in the minimal no-scale supergravity model with Kähler potential K 1⁄4 −3 lnðT þ T†Þ, which is partly based upon theoretical calculations of corrections to this structure [23,24]
Summary
Cosmological inflation [1,2,3,4] provides one of the most promising arenas for probing physics close to the Planck scale, potentially even providing a window onto string theory. The simplest no-scale supergravity model has a single complex field T that parametrizes a noncompact SU(1,1)/ U(1) coset manifold with a Kähler potential K 1⁄4 −3 lnðT þ TÃÞ [9,10], and would correspond to the volume modulus in a string compactification [19] It is a muchdebated, very general and open, question how the values of the real and imaginary components of this and other compactification moduli could be fixed dynamically in the low-energy physical vacuum [20,21].1. This model provides a successful scenario for inflation in the context of a minimal string-inspired noscale supergravity model
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
