D-brane scattering and annihilation

Guido D’Amico, Roberto Gobbetti, Matthew Kleban, Marjorie Schillo

    Research output: Contribution to journalArticlepeer-review


    Abstract: 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 < ls, 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 gs 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 (US)
    Article number50
    JournalJournal of High Energy Physics
    Issue number1
    StatePublished - Jan 12 2015


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

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics


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