Three Point Tree Level Amplitude in Superstring Theory
Ehsan Hatefi
TL;DR
This paper computes the three-point amplitude involving gauge fields and R-R fields in superstring theory to verify zero amplitude results and explore gauge couplings to R-R fields on BPS branes.
Contribution
It provides a detailed calculation of the disk level S-matrix for one R-R field and two gauge fields, clarifying amplitude properties and gauge couplings.
Findings
Confirmed the zero amplitude for three massless points in certain cases
Derived explicit gauge field couplings to R-R fields
Validated amplitude calculations with string and field theory consistency
Abstract
In order to check the definite amplitude and the exact zero result of the amplitude of three massless points in both string theory and field theory side for case and to find all gauge field couplings to R-R closed string, we investigate the disk level S-matrix element of one Ramond-Ramond field and two gauge field vertex operators in the world volume of BPS branes.
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