On the time-dependent description for the decay of unstable D-branes

Details On the time-dependent description for the decay of unstable D-branes On the time-dependent description for the decay of unstable D-branes

2006-07-31

arxiv.org/abs/hep-th/0608003v3

JHEP 0702:011,2007

Physics

High Energy Physics

High Energy Physics - Theory

37 pages, Latex, 2 figures; v2: Acknowledgement added

Scientific paper

10.1088/1126-6708/2007/02/011

We discuss how to describe time-dependent phenomena in string theory like the decay of unstable D-branes with the help of the world-sheet formulation. It is shown in a nontrivial well-controlled example that the coupling of the tachyons to propagating on-shell modes which escape to infinity can lead to time-dependent relaxation into a stationary final state. The final state corresponds to a fixed point of the RG flow generated by the relevant field from which the tachyon vertex operator is constructed. On the way we set up a fairly general formalism for the description of slow time-dependent phenomena with the help of conformal perturbation theory on the world-sheet.

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