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The Sun Also Rises: the High-Temperature Expansion of the Thermal Sunset

by Andreas Ekstedt, Johan Löfgren

Submission summary

As Contributors: Andreas Ekstedt · Johan Löfgren
Arxiv Link: (pdf)
Date submitted: 2020-06-25
Submitted by: Löfgren, Johan
Submitted to: SciPost Physics
Discipline: Physics
Subject area: High-Energy Physics - Theory
Approaches: Theoretical, Computational


We give a prescription for calculating the high-temperature expansion of the thermal sunset integral to arbitrary order. Results up to $\mathcal{O}(T^0)$ are given for both bosonic and fermionic thermal sunsets in dimensional regularisation, and for all odd powers of $T$ up to order $\epsilon^0$. The methods used generalize to non-zero external momentum. We verify the results with sundry analytical and numerical cross-checks. Intermediate steps involve integrals over three Bessel functions.

Current status:
Editor-in-charge assigned

Submission & Refereeing History

Submission 2006.02179v2 on 25 June 2020

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