Flat Potential for Inflaton with a Discrete R-Invariance in Supergravity

1 August 1994

journal article
Published by Oxford University Press (OUP) in Progress of Theoretical Physics

Vol. 92 (2) , 437-447
https://doi.org/10.1143/ptp.92.437

Abstract

We show that a very flat potential of inflaton required for a sufficient inflation is naturally obtained in N = 1 supergravity by imposing a discrete R-invariance Z_n (n ≥3). Several cosmological constraints on parameters in the inflaton superpotential are derived. The reheating temperature turns out to be (1 - 10⁸) GeV for the cases n = 3 - 10. Baryogenesis in this model is also discussed briefly.

Keywords

FLAT POTENTIAL
INFLATION
DISCRETE R INVARIANCE
POTENTIAL FOR INFLATON
SUPERGRAVITY
COSMOLOGICAL CONSTRAINTS
INFLATON REQUIRED

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