Deriving on-shell open string field amplitudes without using Feynman rules

Toru Masuda; Hiroaki Matsunaga

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arXiv · 1908.09784

Deriving on-shell open string field amplitudes without using Feynman rules

Toru Masuda·Hiroaki Matsunaga

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Abstract

We present a series of new gauge invariant quantities in Witten's open string field theory. They are defined for a given set of open string states which satisfy the physical state condition around a classical solution. For known classical solutions, we show that these gauge invariant quantities compute on shell tree-level scattering amplitudes around the correspondent D-brane configuration.

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Toru Masuda, Hiroaki Matsunaga. 2019-08-26. Deriving on-shell open string field amplitudes without using Feynman rules. https://arxiv.org/abs/1908.09784

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