M. Ameri

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hep-th2026

Heterotic string couplings at order $α^{'3}$ in NS-NS sector

Alireza Pahlavan, Mehdi Ameri, Mohammad R. Garousi

We utilize the standard T-duality procedure to derive the classical effective action of heterotic string theory at the eight-derivative order within the NS-NS sector, which compris…

hep-th2025

Effective action of bosonic string theory at order $I^\pm^{'3}$

Mehdi Ameri, Alireza Pahlavan, Mohammad R. Garousi

In this work, we derive the classical effective action of bosonic string theory at order $I^\pm^{' 3}$ for the metric, Kalb-Ramond field, and dilaton by imposing a higher-derivative ex…

Heterotic string couplings at order α′3 in NS-NS sector

Effective action of bosonic string theory at order I^±′3

Heterotic string couplings at order $α^{'3}$ in NS-NS sector

Effective action of bosonic string theory at order $I^\pm^{'3}$