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Measurement of the Axial Vector Form Factor from Antineutrino–proton Scattering by T. Cai; M. L. Moore; A. Olivier; S. Akhter; Z. Ahmad Dar; V. Ansari; M. V. Ascencio; A. Bashyal; A. Bercellie; M. Betancourt; A. Bodek; J. L. Bonilla; A. Bravar; H. Budd; G. Caceres; M. F. Carneiro; G. A. Díaz; H. da Motta; J. Felix; L. Fields; A. Filkins; R. Fine; A. M. Gago; H. Gallagher; S. M. Gilligan; R. Gran; E. Granados; D. A. Harris; S. Henry; D. Jena; S. Jena; J. Kleykamp; A. Klustová; M. Kordosky; D. Last; T. Le; A. Lozano; X.-G. Lu; E. Maher; S. Manly; W. A. Mann; C. Mauger; K. S. McFarland; B. Messerly; J. Miller; O. Moreno; J. G. Morfín; D. Naples; J. K. Nelson; C. Nguyen; V. Paolone; G. N. Perdue; K.-J. Plows; M. A. Ramírez; R. D. Ransome; H. Ray; D. Ruterbories; H. Schellman; C. J. Solano Salinas; H. Su; M. Sultana; V. S. Syrotenko; E. Valencia; N. H. Vaughan; A. V. Waldron; M. O. Wascko; C. Wret; B. Yaeggy; L. Zazueta is a Physics and Astronomy article available to read on EtoBox.

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## Abstract Scattering of high energy particles from nucleons probes their structure, as was done in the experiments that established the non-zero size of the proton using electron beams^1^. The use of charged leptons as scattering probes enables measuring the distribution of electric charges, which is encoded in the vector form factors of the nucleon^2^. Scattering weakly interacting neutrinos gives the opportunity to measure both vector and axial vector form factors of the nucleon, providing an additional, complementary probe of their structure. The nucleon transition axial form factor, F~A~, can be measured from neutrino scattering from free nucleons, ν~μ~n → μ^−^p and $${\bar{\nu }}\_{\mu }p\to {\mu }^{+}n$$ ν ̄ μ p → μ + n , as a function of the negative four-momentum transfer squared (Q^2^). Up to now, F~A~(Q^2^) has been extracted from the bound nucleons in neutrino–deuterium scattering^3–9^, which requires uncertain nuclear corrections^10^. Here we report the first high-statistics measurement, to our knowledge, of the $${\bar{\nu }}\_{\mu }\,p\to {\mu }^{+}n$$ ν ̄ μ p → μ + n cross-section from the hydrogen atom, using the plastic scintillator target of the MINERvA^11^ ex

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Author

T. Cai; M. L. Moore; A. Olivier; S. Akhter; Z. Ahmad Dar; V. Ansari; M. V. Ascencio; A. Bashyal; A. Bercellie; M. Betancourt; A. Bodek; J. L. Bonilla; A. Bravar; H. Budd; G. Caceres; M. F. Carneiro; G. A. Díaz; H. da Motta; J. Felix; L. Fields; A. Filkins; R. Fine; A. M. Gago; H. Gallagher; S. M. Gilligan; R. Gran; E. Granados; D. A. Harris; S. Henry; D. Jena; S. Jena; J. Kleykamp; A. Klustová; M. Kordosky; D. Last; T. Le; A. Lozano; X.-G. Lu; E. Maher; S. Manly; W. A. Mann; C. Mauger; K. S. McFarland; B. Messerly; J. Miller; O. Moreno; J. G. Morfín; D. Naples; J. K. Nelson; C. Nguyen; V. Paolone; G. N. Perdue; K.-J. Plows; M. A. Ramírez; R. D. Ransome; H. Ray; D. Ruterbories; H. Schellman; C. J. Solano Salinas; H. Su; M. Sultana; V. S. Syrotenko; E. Valencia; N. H. Vaughan; A. V. Waldron; M. O. Wascko; C. Wret; B. Yaeggy; L. Zazueta

Publisher

Nature Publishing Group UK

Published

2023

Language

EN

Field

Physics and Astronomy (Physical Sciences)