String predictions for near future colliders from one-loop scattering amplitudes around D-brane worlds

TL;DR

This paper derives compact one-loop scattering amplitude expressions for open-string vector bosons in D-brane configurations, aiding the understanding of string interactions and potential phenomenological implications.

Contribution

It provides new compact formulas for one-loop open-string scattering amplitudes in supersymmetric D-brane setups, validated through singularity and modular transformation analyses.

Findings

Validated amplitude formulas against singularity structures.

Computed total cross section for open string decay into closed strings.

Enhanced understanding of string interactions relevant to collider phenomenology.

Abstract

We derive compact expressions for one-loop scattering amplitudes of four open-string vector bosons around supersymmetric configurations with intersecting or magnetized D-branes on toroidal orbifolds. We check the validity of our formulae against the structure of their singularities and their behaviour under modular transformations to the transverse channel, exposing closed string exchange. We then specialize to the case of forward scattering and compute the total cross section for two massless open string vector bosons on the brane to decay into closed strings in the bulk, relying on the optical theorem. Although not directly related to collider signatures our predictions represent a step forward towards unveiling phenomenological implications of open and unoriented superstrings