Gravitational electron–positron scattering W. D. R. Jesus, P. R. A. Souza, A. F. Santos and Faqir C. Khanna Eur. Phys. J. Plus, 137 2 (2022) 260 Published online: 23 February 2022 DOI: 10.1140/epjp/s13360-022-02479-z