Comments on D-brane dynamics near NS5-branes
Aug, 200418 pages
Published in:
- JHEP 10 (2004) 008
e-Print:
- hep-th/0408070 [hep-th]
Report number:
- EFI-04-29
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Abstract:
We study the properties of a D-brane in the presence of NS5 branes. The Dirac-Born-Infeld action describing the dynamics of this D-brane is very similar to that of a non-BPS D-brane in ten dimensions. As the D-brane approaches the fivebranes, its equation of state approaches that of a pressureless fluid. In non-BPS D-brane case this is considered as an evidence for the decay of the D-brane into ``tachyon matter''. We show that in our case similar behavior is the consequence of the motion of the D-brane. In particular in the rest frame of the moving D-brane the equation of state is that of a usual D-brane, for which the pressure is equal to the energy density. We also compute the total cross-section for the decay of the D-brane into closed string modes and show that the emitted energy has a power like divergence for , and branes, while converges for higher dimensional D-branes. We also speculate on the possibility that the infalling D-brane describes a decaying defect in six dimensional Little String Theory.- D-branes
- Tachyon Condensation
- membrane model: D-brane
- membrane model: p-brane
- p-brane: 5
- transformation: Lorentz
- tensor: energy-momentum
- holography
- membrane: decay
- Born-Infeld model
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