D-brane scattering and annihilation

Guido D'Amico*, Roberto Gobbetti, Matthew Kleban, Marjorie Schillo

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review


We study the dynamics of parallel brane-brane and brane-antibrane scattering in string theory in flat spacetime, focusing on the pair production of open strings that stretch between the branes. We are particularly interested in the case of scattering at small impact parameter b <l(s), where there is a tachyon in the spectrum when a brane and an antibrane approach within a string length. Our conclusion is that despite the tachyon, branes and antibranes can pass through each other with only a very small probability of annihilating, so long as g(s) is small and the relative velocity v is neither too small nor too close to 1. Our analysis is relevant also to the case of charged open string production in world-volume electric fields, and we make use of this T-dual scenario in our analysis. We briefly discuss the application of our results to a stringy model of inflation involving moving branes.

Original languageEnglish
Article number050
Number of pages29
JournalJournal of High Energy Physics
Issue number1
Publication statusPublished - 12 Jan 2015


  • Cosmology of Theories beyond the SM
  • D-branes
  • String Field Theory


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