Nucleon axial-vector form factor and radius from radiatively-corrected antineutrino scattering data
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866917390964490240 |
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| author | Tomalak, Oleksandr Meyer, Aaron S. Wret, Clarence Cai, Tejin Hill, Richard J. McFarland, Kevin S. |
| author_facet | Tomalak, Oleksandr Meyer, Aaron S. Wret, Clarence Cai, Tejin Hill, Richard J. McFarland, Kevin S. |
| contents | The nucleon axial-vector form factor, $G_A$, is critical to determine the electroweak interactions of leptons with nucleons. Important examples of processes influenced by $G_A$ are elastic (anti)neutrino-nucleon scattering and muon capture by the proton. Sparse experimental data results in a large uncertainty on the momentum dependence of $G_A$ and has motivated the consideration of new experimental probes and first-principles lattice quantum chromodynamics (QCD) evaluations. The comparison of new and precise theoretical predictions for $G_A$ with future experimental data necessitates the application of radiative corrections to experimentally-observable processes. We apply these corrections in the extraction of $G_A$ and the associated axial-vector radius from the recent MINERvA antineutrino-hydrogen data, compare the effects from radiative corrections to other uncertainties in neutrino scattering experiments, and discuss the comparison of lattice QCD evaluations to experimental measurements. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2601_21155 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Nucleon axial-vector form factor and radius from radiatively-corrected antineutrino scattering data Tomalak, Oleksandr Meyer, Aaron S. Wret, Clarence Cai, Tejin Hill, Richard J. McFarland, Kevin S. High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Lattice Nuclear Experiment Nuclear Theory The nucleon axial-vector form factor, $G_A$, is critical to determine the electroweak interactions of leptons with nucleons. Important examples of processes influenced by $G_A$ are elastic (anti)neutrino-nucleon scattering and muon capture by the proton. Sparse experimental data results in a large uncertainty on the momentum dependence of $G_A$ and has motivated the consideration of new experimental probes and first-principles lattice quantum chromodynamics (QCD) evaluations. The comparison of new and precise theoretical predictions for $G_A$ with future experimental data necessitates the application of radiative corrections to experimentally-observable processes. We apply these corrections in the extraction of $G_A$ and the associated axial-vector radius from the recent MINERvA antineutrino-hydrogen data, compare the effects from radiative corrections to other uncertainties in neutrino scattering experiments, and discuss the comparison of lattice QCD evaluations to experimental measurements. |
| title | Nucleon axial-vector form factor and radius from radiatively-corrected antineutrino scattering data |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Lattice Nuclear Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2601.21155 |