Bijnens, Johan; Hermansson-Truedsson, Nils; Laub, Laetitia; Rodríguez-Sánchez, Antonio (2021). The two-loop perturbative correction to the (g−2)μ HLbL at short distances. Journal of High Energy Physics, 2021(4) Springer 10.1007/JHEP04(2021)240
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The short-distance behaviour of the hadronic light-by-light (HLbL) contribu- tion to (g−2)μ has recently been studied by means of an operator product expansion in a background electromagnetic field. The leading term in this expansion has been shown to be given by the massless quark loop, and the non-perturbative corrections are numerically very suppressed. Here, we calculate the perturbative QCD correction to the massless quark loop. The correction is found to be fairly small compared to the quark loop as far as we study energy scales where the perturbative running for the QCD coupling is well-defined, i.e. for scales μ > 1GeV. This should allow to reduce the large systematic uncertainty associated to high-multiplicity hadronic states.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) 08 Faculty of Science > Institute of Theoretical Physics |
UniBE Contributor: |
Hermansson Truedsson, Nils, Laub, Laetitia Sarah Gabrielle |
Subjects: |
500 Science > 530 Physics |
ISSN: |
1029-8479 |
Publisher: |
Springer |
Language: |
English |
Submitter: |
Esther Fiechter |
Date Deposited: |
07 Jun 2021 13:44 |
Last Modified: |
05 Dec 2022 15:51 |
Publisher DOI: |
10.1007/JHEP04(2021)240 |
ArXiv ID: |
2101.09169 |
BORIS DOI: |
10.48350/156233 |
URI: |
https://boris.unibe.ch/id/eprint/156233 |
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