https://doi.org/10.1140/epjc/s10052-022-11138-7
Regular Article - Theoretical Physics
E- and T-model hybrid inflation
Laboratory of Physics, Faculty of Engineering, Aristotle University of Thessaloniki, 541 24, Thessaloniki, Greece
Received:
2
November
2022
Accepted:
11
December
2022
Published online:
2
January
2023
We consider the impact of a kinetic pole of order one or two on the non-supersymmetric model of hybrid inflation. These poles arise due to logarithmic Kähler potentials which control the kinetic mixing of the inflaton field and parameterize hyperbolic manifolds with scalar curvature related to the coefficient 
of the logarithm. Inflation is associated with the breaking of a local 
symmetry, which does not produce any cosmological defects after it, and remains largely immune from the minimal possible radiative corrections to the inflationary potential. For 
and equal values of the relevant coupling constants, 
and 
, the achievement of the observationally central value for the scalar spectral index, 
, requires the mass parameter, m, and the symmetry breaking scale, M, to be of the order of 
and 
respectively. Increasing N above unity the tensor-to-scalar ratio r increases above 0.002 and reaches its maximal allowed value for 
.
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