Non-Perturbative Tachyon Potential from the Wilsonian Renormalization Group

Details Non-Perturbative Tachyon Potential from the Wilsonian Renormalization Group Non-Perturbative Tachyon Potential from the Wilsonian Renormalization Group

2005-02-04

arxiv.org/abs/hep-th/0502056v3

Mod.Phys.Lett. A20 (2005) 807-811

Physics

High Energy Physics

High Energy Physics - Theory

6 pages, further references added

Scientific paper

10.1142/S0217732305017135

The derivative expansion of the Wilsonian renormalization group generates additional terms in the effective beta-functions not present in the perturbative approach. Applied to the nonlinear sigma model, to lowest order the vanishing of the beta-function for the tachyon field generates an equation analogous to that found in open string field theory. Although the nonlinear term depends on the cut-off function, this arbitrariness can be removed by a rescaling of the tachyon field.

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