Dynamical Decay of Brane-Antibrane and Dielectric Brane

2002/04/30 by Koji Hashimoto
Physics and Astronomy · #Annihilation #Black Holes and Theoretical Physics #Brane #Brane cosmology #Classical mechanics #Cosmology and Gravitation Theories #D-brane #Mathematical physics #Noncommutative and Quantum Gravity Theories #Particle physics #Physics #String field theory #String theory #Tachyon #Tachyon condensation #hep-th

paper · pdf · doi:10.1088/1126-6708/2002/07/035

published as JHEP 0207:035,2002 · 46 pages, 17 eps figures, references added, typos corrected

arxiv created 2002/06/12 · openalex publication_date 2002/07/12 · arxiv updated 2014/11/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Using D-brane effective field theories, we study dynamical decay of unstable brane systems : (i) a parallel brane-antibrane pair with separation l and (ii) a dielectric brane. In particular we give explicitly the decay width of these unstable systems, and describe how the decay proceeds after the tunnel effect. The decay (i) is analysed by the use of a tachyon effective action on the Dp-Dpbar. A pair annihilation starts by nucleation of a bubble of a tachyon domain wall which represents a throat connecting these branes, and the tunneling decay width is found to be proportional to exp(-l^p+1 T_Dp). We study also the decay leaving topological defects corresponding to lower-dimensional branes, which may be relevant for recent inflationary braneworld scenario. As for the decay (ii), first we observe that Dp-branes generically ``curl up'' in a nontrivial RR field strength. Using this viewpoint, we compute the decay width of the dielectric D2-branes by constructing relevant Euclidean bounce solutions in the shape of a funnel. We also give new solutions in doughnut shape which are involved with nucleation of dielectric branes from nothing.

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