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We study the high-energy limit of tree-level string production amplitudesfrom decaying D-branes in bosonic string theory, interpreting the vertexoperators as external charges interacting with a Coulomb gas corresponding tothe rolling tachyon background, and performing an electrostatic analysis. Inparticular, we consider two open string - one closed string amplitudes and fouropen string amplitudes, and calculate explicit formulas for the leadingexponential behavior.

High-energy asymptotics of D-brane decay amplitudes from Coulomb gas electrostatics