Soft photon propagation in a hot and dense medium to next-to-leading order
Gorda, Tyler; Kurkela, Eero Aleksi; Österman, Juuso; Paatelainen, Risto; Säppi, Saga; Schicho, Philipp; Seppänen, Kaapo; Vuorinen, Aleksi
Peer reviewed, Journal article
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2023Metadata
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Gorda, T., Kurkela, A., Österman, J., Paatelainen, R., Säppi, S., Schicho, P., ... & Vuorinen, A. (2023). Soft photon propagation in a hot and dense medium to next-to-leading order. Physical Review D, 107(3), 036012. 10.1103/PhysRevD.107.036012Abstract
We present the first complete calculation of the soft photon self-energy to the next-to-leading order in a hot and/or dense ultrarelativistic plasma in QED. The calculation is performed within the real-time formalism utilizing dimensional regularization in 4 − 2 ϵ dimensions, while the result is reported including explicit O ( ϵ ) terms in the zero-temperature limit. This information is required to extend the perturbative calculation of the pressure of cold and dense QED matter to partial next-to-next-to-next-to-leading order in a weak-coupling expansion, reported in a companion paper. These results pave the way for a similar future calculation in quantum chromodynamics.