A subtraction scheme for massive QED

T. Engel (Paul Scherrer Institut, Villigen PSI, CH-5232, Switzerland; Physik-Institut, Universität Zürich, Winterthurerstrasse 190, Zürich, CH-8057, Switzerland) ; A. Signer (Paul Scherrer Institut, Villigen PSI, CH-5232, Switzerland; Physik-Institut, Universität Zürich, Winterthurerstrasse 190, Zürich, CH-8057, Switzerland) ; Y. Ulrich (Paul Scherrer Institut, Villigen PSI, CH-5232, Switzerland; Physik-Institut, Universität Zürich, Winterthurerstrasse 190, Zürich, CH-8057, Switzerland)

We present an extension of the FKS subtraction scheme beyond next-to-leading order to deal with soft singularities in fully differential calculations within QED with mas- sive fermions. After a detailed discussion of the next-to-next-to-leading order case, we show how to extend the scheme to even higher orders in perturbation theory. As an application we discuss the computation of the next-to-next-to-leading order QED corrections to the muon decay and present differential results with full electron mass dependence.

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      "value": "We present an extension of the FKS subtraction scheme beyond next-to-leading order to deal with soft singularities in fully differential calculations within QED with mas- sive fermions. After a detailed discussion of the next-to-next-to-leading order case, we show how to extend the scheme to even higher orders in perturbation theory. As an application we discuss the computation of the next-to-next-to-leading order QED corrections to the muon decay and present differential results with full electron mass dependence."
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Published on:
15 January 2020
Publisher:
Springer
Published in:
Journal of High Energy Physics , Volume 2020 (2020)
Issue 1
Pages 1-28
DOI:
https://doi.org/10.1007/JHEP01(2020)085
arXiv:
1909.10244
Copyrights:
The Author(s)
Licence:
CC-BY-3.0

Fulltext files: