Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2008-04-17
Phys.Rev.D78:061901,2008
Physics
High Energy Physics
High Energy Physics - Theory
4 pages, revtex, v2: eq.(22), (24) and (25) corrected
Scientific paper
10.1103/PhysRevD.78.061901
The motion of a Dp-brane in the background of a stack of coincident NS5-branes is analysed as the motion of a relativistic point particle in the transverse space of the five-branes. In this system, the particle experiences a proper acceleration orthogonal to its proper velocity due to the background dilaton field which changes the dynamics from that of a simple geodesic motion. In particular, we show that in the vicinity of the five-branes, it is this acceleration which is responsible for modifying the motion of the radial mode to that of an inverted simple harmonic oscillator leading to the tachyonic instability.
Das Ashok
Panda Sudhakar
Roy Shibaji
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