The Nucleon Axial Form Factor from Elementary Target Data

Journal Article · Tue Dec 16 04:00:00 EST 2025 · No journal information

OSTI ID:3010178

Meyer, A. S. ^[1]; Cai, T. ^[2]; Moore, M. ^[3]; Akhter, S. ^[4]; Dar, Z. Ahmad ^[5]; Sajjad Athar, M. ^[4]; Betancourt, M. ^[6]; Budd, H. ^[7]; Caceres, G. ^[8]; Correia, D. S. ^[9]; Díaz, G. A. ^[10]; Felix, J. ^[11]; Gago, A. M. ^[12]; Gallagher, H. ^[13]; Gaur, P. K. ^[4]; Gilligan, S. M. ^[14]; Gran, R. ^[15]; Granados, E. ^[11]; Harris, D. A. ^[16]; Hart, A. L. ^[17] ; Hill, R. J. ^[18]; Kleykamp, J. ^[19]; Klustová, A. ^[20]; Kordosky, M. ^[21]; Last, D. ^[22]; Lozano, A. ^[23]; Manly, S. ^[7]; Mann, W. A. ^[13]; McFarland, K. S. ^[7]; Moreno, O. ^[24]; Nelson, J. K. ^[21]; Olivier, A. ^[25]; Paolone, V. ^[26]; Perdue, G. N. ^[10]; Pernas, C. ^[21]; Ramírez, M. A. ^[27]; Ransome, R. D. ^[28]; Schellman, H. ^[14]; Solano Salinas, C. J. ^[29]; Vaughan, N. H. ^[14]; Wascko, M. O. ^[30]; Zazueta, L. ^[31]

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1. LLNL, Livermore
2. York U., Canada; Rochester U.
3. Rochester U.; SLAC; Stanford U.
4. Aligarh Muslim U.
5. William-Mary Coll.; Aligarh Muslim U.
6. Fermilab
7. Rochester U.
8. Rio de Janeiro, CBPF; UC, Davis (main)
9. Rio de Janeiro, CBPF
10. Fermilab; Rochester U.
11. Guanajuato U.
12. Lima, Pont. U. Catolica
13. Tufts U.
14. Oregon State U.
15. Minnesota U., Duluth
16. York U., Canada; Fermilab
17. Queen Mary, U. of London (main)
18. Kentucky U.; Fermilab
19. Rochester U.; U. Miss, Oxford
20. Imperial Coll., London
21. William-Mary Coll.
22. Rochester U.; UPenn, Philadelphia
23. Rio de Janeiro, CBPF; Drexel U.
24. William-Mary Coll.; Guanajuato U.
25. Notre Dame U.; Rochester U.; Argonne (main)
26. Pittsburgh U.
27. UPenn, Philadelphia; Guanajuato U.
28. Rutgers U., Piscataway (main)
29. San Marcos Natl. U.
30. Oxford U.; Imperial Coll., London
31. William-Mary Coll.; Syracuse U. (main)

Precise neutrino-nucleon amplitudes are essential ingredients for predicting neutrino event rates in current and upcoming long-baseline neutrino oscillation experiments. A common neutrino interaction with a low reaction threshold and with most of the energy carried by two final state particles is quasielastic scattering, for which the nucleon axial form factor, $$F_{A}(Q^{2})$$, is a dominant source of uncertainty. Improvements to the nucleon axial form factor rely on neutrino scattering data with elementary targets to reduce or eliminate the need for nuclear modeling systematics. This work examines constraints on the nucleon axial form factor that can be achieved from datasets of neutrino scattering on deuterium targets, Lattice QCD predictions, and from the recent hydrogen target data from the MINERvA Collaboration. Significant tension is found between hydrogen and deuterium target data, suggesting that extractions from deuterium underestimate both the central value and uncertainty of the form factor. Parameterizations for and uncertainties of the nucleon axial form factor using the $$z$$ expansion are provided.

• Research Organization: U. Miss, Oxford; Kentucky U.; Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Lima, Pont. U. Catolica; Oregon State U.; Aligarh Muslim U.; Rochester U.; Tufts U.; Guanajuato U.; UC, Davis (main); Pittsburgh U.; UPenn, Philadelphia; Notre Dame U.; Drexel U.; Syracuse U. (main); Imperial Coll., London; William-Mary Coll.; San Marcos Natl. U.; Rio de Janeiro, CBPF; Queen Mary, U. of London (main); Stanford U.; Rutgers U., Piscataway (main); York U., Canada; Argonne National Laboratory (ANL), Argonne, IL (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Minnesota U., Duluth; Oxford U.
• Sponsoring Organization: US Department of Energy
• DOE Contract Number: 89243024CSC000002
• OSTI ID: 3010178
• Report Number(s): LLNL-JRNL-2014317; FERMILAB-PUB-25-0912-LBNF-T; oai:inspirehep.net:3093240; arXiv:2512.14097
• Journal Information: No journal information, Journal Name: No journal information
• Country of Publication: United States
• Language: English