26,999 research outputs found

    Closed strings from decaying D-branes

    Full text link
    We compute the emission of closed string radiation from homogeneous rolling tachyons. For an unstable decaying Dpp-brane the radiated energy is infinite to leading order for p≤2p\leq 2 and finite for p>2p>2. The closed string state produced by a decaying brane is closely related to the state produced by D-instantons at a critical Euclidean distance from t=0t=0. In the case of a D0 brane one can cutoff this divergence so that we get a finite energy final state which would be the state that the brane decays into.Comment: harvmac, 30 pages, 2 figures. v3: Improved discussion for non compact brane
    • …
    corecore