Department of Physics Papers
Document Type
Journal Article
Date of this Version
12-7-2012
Abstract
It was recently demonstrated that, when coupled to N = 1 supergravity, the Dirac-Born-Infeld (DBI) action constructed from a single chiral superfield has the property that when the higher-derivative terms become important, the potential becomes negative. Thus, DBI inflation cannot occur in its most interesting, relativistic regime. In this paper, it is shown how to overcome this problem by coupling the model to one or more additional chiral supermultiplets. In this way, one obtains effective single real scalar field DBI models with arbitrary positive potentials, as well as multiple real scalar field DBI inflation models with hybrid potentials.
Recommended Citation
Koehn, M., Lehners, J., & Ovrut, B. A. (2012). DBI Inflation in N = 1 Supergravity. Retrieved from https://repository.upenn.edu/physics_papers/268
Date Posted: 31 January 2013
This document has been peer reviewed.
Comments
Koehn, M., Lehners, J., & Ovrut, B. A. (2012). DBI Inflation in N = 1 Supergravity. Physical Review D, 86(12), 123510. doi: 10.1103/PhysRevD.86.123510
© 2012 American Physical Society