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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2411.07115 |
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| _version_ | 1866913860311580672 |
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| author | Estrada, Emilio J. Márquez, Juan Manuel Portillo-Sánchez, Diego Roig, Pablo |
| author_facet | Estrada, Emilio J. Márquez, Juan Manuel Portillo-Sánchez, Diego Roig, Pablo |
| contents | We analyze the proton$\text{-}$box contribution to the hadronic light$\text{-}$by$\text{-}$light part of the muon's anomalous magnetic moment, which is the first reported baryonic contribution to this piece. We follow the quark$\text{-}$loop analysis, incorporating the relevant data$\text{-}$driven and lattice proton form factors. Although the heavy mass expansion would yield a contribution of $\mathcal{O}(10^{-10})$, the damping of the form factors in the regions where the kernel peaks, explains our finding $a_μ^{\rm{p-box}}=1.82 (7)\times 10^{-12}$, two orders of magnitude smaller than the forthcoming uncertainty on the $a_μ$ measurement and on its Standard Model prediction. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_07115 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Proton-box contribution to $a_μ^{\rm{HLbL}}$ Estrada, Emilio J. Márquez, Juan Manuel Portillo-Sánchez, Diego Roig, Pablo High Energy Physics - Phenomenology We analyze the proton$\text{-}$box contribution to the hadronic light$\text{-}$by$\text{-}$light part of the muon's anomalous magnetic moment, which is the first reported baryonic contribution to this piece. We follow the quark$\text{-}$loop analysis, incorporating the relevant data$\text{-}$driven and lattice proton form factors. Although the heavy mass expansion would yield a contribution of $\mathcal{O}(10^{-10})$, the damping of the form factors in the regions where the kernel peaks, explains our finding $a_μ^{\rm{p-box}}=1.82 (7)\times 10^{-12}$, two orders of magnitude smaller than the forthcoming uncertainty on the $a_μ$ measurement and on its Standard Model prediction. |
| title | Proton-box contribution to $a_μ^{\rm{HLbL}}$ |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2411.07115 |