Data-driven results for light-quark connected and strange-plus-disconnected hadronic $g-2$ short- and long-distance windows
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866913579679088640 |
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| author | Benton, Genessa Boito, Diogo Golterman, Maarten Keshavarzi, Alexander Maltman, Kim Peris, Santiago |
| author_facet | Benton, Genessa Boito, Diogo Golterman, Maarten Keshavarzi, Alexander Maltman, Kim Peris, Santiago |
| contents | A key issue affecting the attempt to reduce the uncertainty on the Standard Model prediction for the muon anomalous magnetic moment is the current discrepancy between lattice-QCD and data-driven results for the hadronic vacuum polarization. Progress on this issue benefits from precise data-driven determinations of the isospin-limit light-quark-connected (lqc) and strange-plus-light-quark-disconnected (s+lqd) components of the related RBC/UKQCD windows. In this paper, using a strategy employed previously for the intermediate window, we provide data-driven results for the lqc and s+lqd components of the short- and long-distance RBC/UKQCD windows. Comparing these results with those from the lattice, we find significant discrepancies in the lqc parts but good agreement for the s+lqd components. We also explore the impact of recent CMD-3 $e^+e^-\to π^+π^-$ cross-section results, demonstrating that an upward shift in the $ρ$-peak region of the type seen in the CMD-3 data serves to eliminate the discrepancies for the lqc components without compromising the good agreement between lattice and data-driven s+lqd results. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_06637 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Data-driven results for light-quark connected and strange-plus-disconnected hadronic $g-2$ short- and long-distance windows Benton, Genessa Boito, Diogo Golterman, Maarten Keshavarzi, Alexander Maltman, Kim Peris, Santiago High Energy Physics - Phenomenology High Energy Physics - Lattice A key issue affecting the attempt to reduce the uncertainty on the Standard Model prediction for the muon anomalous magnetic moment is the current discrepancy between lattice-QCD and data-driven results for the hadronic vacuum polarization. Progress on this issue benefits from precise data-driven determinations of the isospin-limit light-quark-connected (lqc) and strange-plus-light-quark-disconnected (s+lqd) components of the related RBC/UKQCD windows. In this paper, using a strategy employed previously for the intermediate window, we provide data-driven results for the lqc and s+lqd components of the short- and long-distance RBC/UKQCD windows. Comparing these results with those from the lattice, we find significant discrepancies in the lqc parts but good agreement for the s+lqd components. We also explore the impact of recent CMD-3 $e^+e^-\to π^+π^-$ cross-section results, demonstrating that an upward shift in the $ρ$-peak region of the type seen in the CMD-3 data serves to eliminate the discrepancies for the lqc components without compromising the good agreement between lattice and data-driven s+lqd results. |
| title | Data-driven results for light-quark connected and strange-plus-disconnected hadronic $g-2$ short- and long-distance windows |
| topic | High Energy Physics - Phenomenology High Energy Physics - Lattice |
| url | https://arxiv.org/abs/2411.06637 |