{"paper":{"title":"Nucleon Axial Radius and Muonic Hydrogen - A New Analysis and Review","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-lat","nucl-ex","nucl-th"],"primary_cat":"hep-ph","authors_text":"Alberto Sirlin, Peter Kammel, Richard J. Hill, William J. Marciano","submitted_at":"2017-08-28T18:00:05Z","abstract_excerpt":"Weak capture in muonic hydrogen ($\\mu$H) as a probe of the chiral properties and nucleon structure predictions of Quantum Chromodynamics (QCD) is reviewed. A recent determination of the axial-vector charge radius squared, $r_A^2(z\\; {\\rm exp.}) = 0.46(22)\\;{\\rm fm}^2$, from a model independent $z$ expansion analysis of neutrino-nucleon scattering data is employed in conjunction with the MuCap measurement of the singlet muonic hydrogen capture rate, $\\Lambda_{\\rm singlet}^{\\rm MuCap} = 715.6(7.4)\\;{\\rm s}^{-1}$, to update the induced pseudoscalar nucleon coupling: $\\bar{g}_P^{\\rm MuCap} = 8.23("},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.08462","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}