Maximally Helicity Violating Disk Amplitudes, Twistors and Transcendental Integrals

Details Maximally Helicity Violating Disk Amplitudes, Twistors and Transcendental Integrals Maximally Helicity Violating Disk Amplitudes, Twistors and Transcendental Integrals

2012-04-17

arxiv.org/abs/1204.3848v1

Physics

High Energy Physics

High Energy Physics - Theory

7 pages

Scientific paper

We obtain simple expressions for tree-level maximally helicity violating amplitudes of N gauge bosons from disk world-sheets of open superstrings. The amplitudes are written in terms of (N-3)! hypergeometric integrals depending on kinematic parameters, weighted by certain kinematic factors. The integrals are transcendental in a strict sense defined in this work. The respective kinematic factors can be succinctly written in terms of "dual" momentum twistors. The amplitudes are computed by using the prescription proposed by Berkovits and Maldacena.

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