Gauss-Bonnet Term on Vacuum Decay

Details Gauss-Bonnet Term on Vacuum Decay Gauss-Bonnet Term on Vacuum Decay

2008-06-16

arxiv.org/abs/0806.2508v2

Phys.Lett.B671:181-186,2009

Physics

High Energy Physics

High Energy Physics - Theory

18 pages, 7 figures, references added, 2 figures replacement, discussion about thin-wall approximation revised, to appear in P

Scientific paper

10.1016/j.physletb.2008.11.053

We study the effect of the Gauss-Bonnet term on vacuum decay process in the Coleman-De Luccia formalism. The Gauss-Bonnet term has an exponential coupling with the real scalar field, which appears in the low energy effective action of string theories. We calculate numerically the instanton solution, which describes the process of vacuum decay, and obtain the critical size of bubble. We find that the Gauss-Bonnet term has a nontrivial effect on the false vacuum decay, depending on the Gauss-Bonnet coefficient.

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