Gauss-Bonnet Term on Vacuum Decay

2008/06/30 by Rong-Gen Cai, Bin Hu, Seoktae Koh · 1 citation
Physics and Astronomy · #hep-th

paper · pdf · doi:10.1016/j.physletb.2008.11.053

published as Phys.Lett.B671:181-186,2009 · 18 pages, 7 figures, references added, 2 figures replacement, discussion about thin-wall approximation revised, to appear in PHYS. LETT. B

arxiv created 2008/11/20 · arxiv updated 2009/12/01

Abstract

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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