Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf
1 PublicationTadpole contribution to magnetic photon-graviton conversion
Ahmadiniaz, N.; Bastianelli, F.; Karbstein, F.; Schubert, C.
Abstract
Photon-graviton conversion in a magnetic field is a process that is usually studied at tree-level, but the one-loop corrections due to scalars and spinors have also been calculated. Differently from the tree-level process, at one-loop one finds the amplitude to depend on the photon polarization, leading to dichroism. However, previous calculations overlooked tadpole contribution of the type that was considered to be vanishing in QED for decades but erroneously so, as shown by H. Gies and one of the authors in 2016. Here we compute this missing diagram in closed form and show that it does not contribute to dichroism.
Keywords: Photon-Graviton amplitude; Worldline formalism; Tadpole contribution
-
Contribution to proceedings
Sixteenth Marcel Grossmann Meeting, 05.-10.07.2021, Virtual Meeting, Virtual Meeting
Proceedings of the Sixteenth Marcel Grossmann Meeting: WORLD SCIENTIFIC, 978-981-126-976-9, 4393-4400
DOI: 10.1142/13149
arXiv: https://arxiv.org/pdf/2111.01980.pdf
Downloads
Permalink: https://www.hzdr.de/publications/Publ-34065