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arXiv · 2104.03314

Scattering Massive String Resonances through Field-Theory Methods

Max Guillen·Henrik Johansson·Renann Lipinski Jusinskas·Oliver Schlotterer
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Abstract

We present a new method, exact in $\alpha'$, to explicitly compute string tree-level amplitudes involving one massive state and any number of massless ones. This construction relies on the so-called twisted heterotic string, which admits only gauge multiplets, a gravitational multiplet, and a single massive supermultiplet in its spectrum. In this simplified model, we determine the moduli-space integrand of all amplitudes with one massive state using Berends-Giele currents of the gauge multiplet. These integrands are then straightforwardly mapped to gravitational amplitudes in the twisted heterotic string and to the corresponding massive amplitudes of the conventional type-I and type-II superstrings.

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Max Guillen, Henrik Johansson, Renann Lipinski Jusinskas, Oliver Schlotterer. 2021-04-07. Scattering Massive String Resonances through Field-Theory Methods. https://doi.org/10.1103/physrevlett.127.051601

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