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arXiv · 1110.3831

Four-Derivative Brane Couplings from String Amplitudes

Katrin Becker·Guangyu Guo·Daniel Robbins
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Abstract

We evaluate the string theory disc amplitude of one Ramond-Ramond field C^(p-3) and two Neveu-Schwarz B-fields in the presence of a single Dp-brane in type II string theory. From this amplitude we extract the four-derivative (or equivalently order (alpha')^2) part of the Dp-brane action involving these fields. We show that the new couplings are invariant under R-R and NS-NS gauge transformations and compatible with linear T-duality.

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Katrin Becker, Guangyu Guo, Daniel Robbins. 2011-10-17. Four-Derivative Brane Couplings from String Amplitudes. https://doi.org/10.1007/jhep12(2011)050

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