BPS Dynamics of (p,q) Triple String Junction

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  • 2 December 1997
Abstract
We study dynamics of triple junction of (p,q)-strings in Type IIB string theory. We probe tension and mass density of (p,q)-strings by studying harmonic fluctuations of the triple junction. We show that they agree perfectly with BPS formula provided suitable geometric interpretation of the junction is given. We provide a precise statement of BPS limit and force-balance property. At weak coupling and sufficiently dense limit, we argue that (p,q)-string embedded in string network is a `wiggly string', whose low-energy dynamics can be described via renormalization group evolved, smooth effective non-relativistic string. We also suggest the possibility that, upon Type IIB strings are promoted to M-theory membrane, there can exist `evanescent' bound-states localized at triple junction.

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