UV Finite Brane Decay

Details UV Finite Brane Decay UV Finite Brane Decay

2003-06-16

arxiv.org/abs/hep-th/0306132v2

JHEP 0311:042,2003

Physics

High Energy Physics

High Energy Physics - Theory

21 pages, 3 figures, minor changes, changed to JHEP style

Scientific paper

10.1088/1126-6708/2003/11/042

The decay of an unstable D-brane via closed string emission and open string pair production is considered in subcritical string theory with a spacelike linear dilaton. The decay rate is given by the imaginary part of the annulus, which has ambiguities corresponding to the choices of incoming closed and open string vacua. An exact expression for the full annulus diagram is computed with a natural choice of incoming vacua. It is found that the ultraviolet divergences present in critical string theory in both of these processes are absent for any nonzero spacelike dilaton. Implications for the vexing issue of the tachyon dust are discussed.

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