'Thin wall' approximations to vacuum decay rates
19916 pages
Published in:
- Phys.Lett.B 261 (1991) 251-256
- Published: 1991
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Abstract: (Elsevier)
We examine the validity of Coleman's “thin-wall” approximation to the euclidean action of the bounce solution by comparing its predictions with exact numerically integrated actions for potentials which yield thin-and thick-wall bubbles. In both cases, the original thin-wall approximation is found to be poor, rapidly diverging from the exact action as the difference in energy of the two vacuum states is increased from zero. We introduce a new approximation scheme, calculationally similar to the original thin-wall scheme, which gives greatly improved accuracy.- phi**n model
- field theory: Euclidean
- field theory: instanton
- vacuum state: decay
- decay: vacuum state
- approximation
- potential
- numerical calculations
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