Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2007-11-05
Phys.Rev.D77:066005,2008
Physics
High Energy Physics
High Energy Physics - Theory
15 pages, 19 figures
Scientific paper
10.1103/PhysRevD.77.066005
The dynamic process of unstable D-branes decaying into stable ones with one dimension lower can be described by a tachyon field with a Dirac-Born-Infeld effective action. In this paper we investigate the fluctuation modes of the tachyon field around a two-parameter family of static solutions representing an array of brane-antibrane pairs. Besides a pair of zero modes associated with the parameters of the solution, and instabilities associated with annihilation of the brane-antibrane pairs, we find states corresponding to excitations of the tachyon field around the brane and in the bulk. In the limit that the brane thickness tends to zero, the support of the eigenmodes is limited to the brane, consistent with the idea that propagating tachyon modes drop out of the spectrum as the tachyon field approaches its ground state. Low-lying excited states, including the zero modes, appear to show a 4-fold degeneracy in this limit. Finally, we also discuss the slow motion of the solution corresponding to the decay process in the moduli space, finding a trajectory which oscillates periodically between the unstable D-brane and the brane-antibrane pairs of one dimension lower.
Hindmarsh Mark
Li Huiquan
No associations
LandOfFree
Perturbations and moduli space dynamics of tachyon kinks does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Perturbations and moduli space dynamics of tachyon kinks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Perturbations and moduli space dynamics of tachyon kinks will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-660220