https://doi.org/10.1140/epjcd/s2003-03-815-7
PS08 Physics Beyond the Standard Model
GUT scale inflation and leptogenesis
Bartol Research Institute, University of Delaware, Newark, DE 19716, USA
Received:
22
October
2003
Accepted:
4
November
2003
Published online:
7
November
2003
We reconsider supersymmetric hybrid inflation in which inflation is associated with the breaking of a gauge symmetry G to H, with the symmetry breaking scale M~1016 GeV. The models discussed feature a spectral index 
while 
and the tensor to scalar ratio 
. If G corresponds to SO(10) or one of its rank five subgroups, the observed baryon asymmetry is naturally explained via leptogenesis.
© Società Italiana di Fisica, Springer-Verlag, 2004
