Linear Inflation from Running Kinetic Term in Supergravity

Details Linear Inflation from Running Kinetic Term in Supergravity Linear Inflation from Running Kinetic Term in Supergravity

2010-06-14

arxiv.org/abs/1006.2801v3

Physics Letters B 693 (2010) 140-143

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 1 figure. v2:minor changes. v3: a version to appear in Physics Letters B

Scientific paper

10.1016/j.physletb.2010.08.029

We propose a class of inflation models in which the coefficient of the inflaton kinetic term rapidly changes with energy scale. This may occur especially if the inflaton moves over a long distance during inflation as in the case of large-scale inflation. The peculiar behavior of the kinetic term opens up a new way to construct an inflation model. As a concrete example we construct a linear inflation model in supergravity. It is straightforward to build a chaotic inflation model with a fractional power along the same line. Interestingly, the potential takes a different form after inflation because of the running kinetic term.

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