Short-distance constraints for the HLbL contribution to the muon anomalous magnetic moment
Hermansson Truedsson, Nils LU
; Bijnens, Johan
LU
and Rodríguez Sánchez, Antonio
LU
(2019)
In Physics Letters B
798.
- Abstract
- We derive short-distance constraints for the hadronic light-by-light contribution (HLbL) to the anomalous magnetic moment of the muon in the kinematic region where the three virtual momenta are all large. We include the external soft photon via an external field leading to a well-defined Operator Product Expansion. We establish that the perturbative quark loop gives the leading contribution in a well defined expansion. We compute the first nonzero power correction. It is related to to the magnetic susceptibility of the QCD vacuum. The results can be used as model-independent short-distance constraints for the very many different approaches to the HLbL contribution. Numerically the power correction is found to be small.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/15d991d4-ad84-4cf4-bf56-7b03e1155863
- author
- Hermansson Truedsson, Nils
LU
; Bijnens, Johan
LU
and Rodríguez Sánchez, Antonio
LU
- organization
- publishing date
- 2019-11-10
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physics Letters B
- volume
- 798
- article number
- 134994
- publisher
- Elsevier
- external identifiers
-
- scopus:85073030902
- ISSN
- 0370-2693
- DOI
- 10.1016/j.physletb.2019.134994
- project
- Higher Order Calculations for Low Energy Precision Physics
- language
- English
- LU publication?
- yes
- id
- 15d991d4-ad84-4cf4-bf56-7b03e1155863
- alternative location
- https://arxiv.org/pdf/1908.03331.pdf
- date added to LUP
- 2019-08-12 14:36:29
- date last changed
- 2024-04-10 09:14:23
@article{15d991d4-ad84-4cf4-bf56-7b03e1155863,
abstract = {{We derive short-distance constraints for the hadronic light-by-light contribution (HLbL) to the anomalous magnetic moment of the muon in the kinematic region where the three virtual momenta are all large. We include the external soft photon via an external field leading to a well-defined Operator Product Expansion. We establish that the perturbative quark loop gives the leading contribution in a well defined expansion. We compute the first nonzero power correction. It is related to to the magnetic susceptibility of the QCD vacuum. The results can be used as model-independent short-distance constraints for the very many different approaches to the HLbL contribution. Numerically the power correction is found to be small.}},
author = {{Hermansson Truedsson, Nils and Bijnens, Johan and Rodríguez Sánchez, Antonio}},
issn = {{0370-2693}},
language = {{eng}},
month = {{11}},
publisher = {{Elsevier}},
series = {{Physics Letters B}},
title = {{Short-distance constraints for the HLbL contribution to the muon anomalous magnetic moment}},
url = {{http://dx.doi.org/10.1016/j.physletb.2019.134994}},
doi = {{10.1016/j.physletb.2019.134994}},
volume = {{798}},
year = {{2019}},
}