Tadpole contribution to magnetic photon-graviton conversion

被引：0
|
作者：
Ahmadiniaz, N. [1 ]
Bastianelli, F. [2 ,3 ]
Karbstein, F. [4 ,5 ]
Schubert, C. [6 ]
机构：
[1] Helmholtz Zentrum Dresden Rossendorf, Bautzner Landstr 400, D-01328 Dresden, Germany
[2] Univ Bologna, Dipartimento Fis & Astron, Via Irnerio 46, I-40126 Bologna, Italy
[3] INFN, Sez Bologna, Via Irnerio 46, I-40126 Bologna, Italy
[4] Helmholtz Inst Jena, Frobelstieg 3, D-07743 Jena, Germany
[5] Friedrich Schiller Univ Jena, Theoret Phys Inst, Max Wien Pl 1, D-07743 Jena, Germany
[6] Univ Michoacana, Inst Fis & Matemat, Edificio C-3,Apdo Postal 2-82, Morelia 58040, Michoacan, Mexico
来源：
SIXTEENTH MARCEL GROSSMANN MEETING | 2023年
关键词：
Photon-graviton; tadpole; Einstein-Maxwell; PARTICLE REDUCIBLE CONTRIBUTION; QUANTUM ELECTRODYNAMICS; ELECTROMAGNETIC-FIELD; VACUUM POLARIZATION; PROPAGATION; LIMITS;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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 a 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.
引用
收藏
页码：4393 / 4400
页数：8
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