Hadronic light-by-light scattering contribution to the anomalous magnetic moment of the muon at the physical pion mass
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arXiv
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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866913580124733440 |
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| author | Fodor, Zoltan Gerardin, Antoine Lellouch, Laurent Szabo, Kalman K. Toth, Balint C. Zimmermann, Christian |
| author_facet | Fodor, Zoltan Gerardin, Antoine Lellouch, Laurent Szabo, Kalman K. Toth, Balint C. Zimmermann, Christian |
| contents | We present a lattice QCD calculation of the hadronic light-by-light scattering contribution to the anomalous magnetic moment of the muon using $N_f=2+1+1$ flavors of staggered quarks with masses tuned to their physical values. Our final result, in the continuum limit, reads $a_μ^{\mathrm{hlbl}} = 125.5(11.6)_{\mathrm{stat}}(0.4)_{\mathrm{syst}} \times 10^{-11}$ where the first error is statistical and the second is systematic. Light, strange and charm-quark contributions are considered. In addition to the connected and leading disconnected contributions, we also include an estimate of the sub-leading disconnected diagrams. Our result is compatible with previous lattice QCD and data-driven dispersive determinations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_11719 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Hadronic light-by-light scattering contribution to the anomalous magnetic moment of the muon at the physical pion mass Fodor, Zoltan Gerardin, Antoine Lellouch, Laurent Szabo, Kalman K. Toth, Balint C. Zimmermann, Christian High Energy Physics - Lattice High Energy Physics - Phenomenology We present a lattice QCD calculation of the hadronic light-by-light scattering contribution to the anomalous magnetic moment of the muon using $N_f=2+1+1$ flavors of staggered quarks with masses tuned to their physical values. Our final result, in the continuum limit, reads $a_μ^{\mathrm{hlbl}} = 125.5(11.6)_{\mathrm{stat}}(0.4)_{\mathrm{syst}} \times 10^{-11}$ where the first error is statistical and the second is systematic. Light, strange and charm-quark contributions are considered. In addition to the connected and leading disconnected contributions, we also include an estimate of the sub-leading disconnected diagrams. Our result is compatible with previous lattice QCD and data-driven dispersive determinations. |
| title | Hadronic light-by-light scattering contribution to the anomalous magnetic moment of the muon at the physical pion mass |
| topic | High Energy Physics - Lattice High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2411.11719 |