Four-Point Amplitude from Open Superstring Field Theory
Nathan Berkovits, Carlos Tello Echevarria
Abstract
An open superstring field theory action has been proposed which does not suffer from contact term divergences. In this paper, we compute the on-shell four-point tree amplitude from this action using the Giddings map. After including contributions from the quartic term in the action, the resulting amplitude agrees with the first-quantized prescription.
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