Cè, M.; Gérardin, A.; von Hippel, G.; Hudspith, R. J.; Kuberski, S.; Meyer, H.; Miura, K.; Mohler, D.; Ottnad, K.; Paul, S.; Risch, A.; San José, M. T.; Wittig, H. (6 April 2023). Intermediate window observable for the hadronic vacuum polarization contribution to the muon $g-2$ from O$(a)$ improved Wilson quarks. In: The 39th International Symposium on Lattice Field Theory (p. 321). Trieste, Italy: Sissa Medialab 10.22323/1.430.0321
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Following the publication of the new measurement of the anomalous magnetic moment of the muon, the discrepancy between experiment and the theory prediction from the g−2 theory initiative has increased to 4.2σ. Recent lattice QCD calculations predict values for the hadronic vacuum polarization contribution that are larger than the data-driven estimates, bringing the Standard Model prediction closer to the experimental measurement. Euclidean time windows in the time-momentum representation of the hadronic vacuum polarization contribution to the muon g−2 can help clarify the discrepancy between the phenomenological and lattice predictions.
We present our calculation of the intermediate distance window contribution using Nf=2+1 flavors of O(a) improved Wilson quarks. We employ ensembles at six lattice spacings below 0.1fm and pion masses down to the physical value. We present a detailed study of the continuum limit, using two discretizations of the vector current and two independent sets of improvement coefficients. Our result at the physical point displays a tension of 3.9σ with a recent evaluation of the intermediate window based on the data-driven method.
Item Type: |
Conference or Workshop Item (Paper) |
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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: |
Cè, Marco |
Subjects: |
500 Science > 530 Physics 500 Science |
Publisher: |
Sissa Medialab |
Language: |
English |
Submitter: |
Franziska Stämpfli |
Date Deposited: |
04 Dec 2023 09:50 |
Last Modified: |
04 Dec 2023 09:50 |
Publisher DOI: |
10.22323/1.430.0321 |
BORIS DOI: |
10.48350/189738 |
URI: |
https://boris.unibe.ch/id/eprint/189738 |
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