R-Invariant Topological Inflation

K.-I. Izawa, M. Kawasaki, T. Yanagida
1999 Progress of theoretical physics  
We propose a topological inflation model in the framework of supergravity with $R$ invariance. This topological inflation model is not only free from the initial value problem of the inflaton field but also gives low reheating temperature which is favored in supergravity since the overproduction of gravitinos is avoided. Furthermore, the predicted spectrum of the density fluctuations is generally tilted, which will be tested by future observations on CMB anisotropies and large scale structure
more » ... e scale structure of the universe.
doi:10.1143/ptp.101.1129 fatcat:qegfky7ndngqflgvel7cqlfi5u