Hybrid calculation of hadronic vacuum polarization in muon g-2 to 0.48\%
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arXiv
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| Autori principali: | , , , , , , , , , , , , , , , , , , , , , |
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| Natura: | Preprint |
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2024
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| author | Boccaletti, A. Borsanyi, Sz. Cotellucci, A. Davier, M. Fodor, Z. Frech, F. Gerardin, A. Giusti, D. Kotov, A. Yu. Lellouch, L. Lippert, Th. Lupo, A. Malaescu, B. Mutzel, S. Portelli, A. Risch, A. Sjo, M. Stokes, F. Szabo, K. K. Toth, B. C. Wang, G. Zhang, Z. |
| author_facet | Boccaletti, A. Borsanyi, Sz. Cotellucci, A. Davier, M. Fodor, Z. Frech, F. Gerardin, A. Giusti, D. Kotov, A. Yu. Lellouch, L. Lippert, Th. Lupo, A. Malaescu, B. Mutzel, S. Portelli, A. Risch, A. Sjo, M. Stokes, F. Szabo, K. K. Toth, B. C. Wang, G. Zhang, Z. |
| contents | We present a new lattice QCD calculation of the leading order hadronic vacuum polarization (LO-HVP) contribution to the muon anomalous magnetic moment $a_μ$. We reduce uncertainties compared to our earlier computation arXiv:2002.12347 by a factor of 1.6. We perform simulations on finer lattices allowing for an even more accurate continuum extrapolation. We also include a small, long-distance contribution obtained using input from experiments in a low-energy regime where they all agree. Combined with other standard model contributions our result, $a_μ^{LO-HVP}=715.1(2.5)(2.3)[3.4] \times 10^{-10}$, leads to a prediction that differs from the recent measurement of $a_μ$ by only 0.5 standard deviations. This provides a remarkable validation of the standard model to 11 digits. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_10913 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Hybrid calculation of hadronic vacuum polarization in muon g-2 to 0.48\% Boccaletti, A. Borsanyi, Sz. Cotellucci, A. Davier, M. Fodor, Z. Frech, F. Gerardin, A. Giusti, D. Kotov, A. Yu. Lellouch, L. Lippert, Th. Lupo, A. Malaescu, B. Mutzel, S. Portelli, A. Risch, A. Sjo, M. Stokes, F. Szabo, K. K. Toth, B. C. Wang, G. Zhang, Z. High Energy Physics - Lattice High Energy Physics - Phenomenology High Energy Physics - Theory We present a new lattice QCD calculation of the leading order hadronic vacuum polarization (LO-HVP) contribution to the muon anomalous magnetic moment $a_μ$. We reduce uncertainties compared to our earlier computation arXiv:2002.12347 by a factor of 1.6. We perform simulations on finer lattices allowing for an even more accurate continuum extrapolation. We also include a small, long-distance contribution obtained using input from experiments in a low-energy regime where they all agree. Combined with other standard model contributions our result, $a_μ^{LO-HVP}=715.1(2.5)(2.3)[3.4] \times 10^{-10}$, leads to a prediction that differs from the recent measurement of $a_μ$ by only 0.5 standard deviations. This provides a remarkable validation of the standard model to 11 digits. |
| title | Hybrid calculation of hadronic vacuum polarization in muon g-2 to 0.48\% |
| topic | High Energy Physics - Lattice High Energy Physics - Phenomenology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2407.10913 |