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The Nucleon Axial Form Factor from Elementary Target Data

Fuente: arXiv

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Hauptverfasser:	Meyer, A. S., Cai, T., Moore, M., Akhter, S., Dar, Z. Ahmad, Athar, M. Sajjad, Betancourt, M., Budd, H., Caceres, G., Correia, D. S., Díaz, G. A., Felix, J., Gago, A. M., Gallagher, H., Gaur, P. K., Gilligan, S. M., Gran, R., Granados, E., Harris, D. A., Hart, A. L., Hill, R. J., Kleykamp, J., Klustová, A., Kordosky, M., Last, D., Lozano, A., Manly, S., Mann, W. A., McFarland, K. S., Moreno, O., Nelson, J. K., Olivier, A., Paolone, V., Perdue, G. N., Pernas, C., Ramírez, M. A., Ransome, R. D., Ruterbories, D., Schellman, H., Salinas, C. J. Solano, Vaughan, N. H., Wascko, M. O., Zazueta, L.
Format:	Preprint
Veröffentlicht:	2025
Schlagworte:	High Energy Physics - Experiment High Energy Physics - Phenomenology
Online-Zugang:	Acceder al recurso
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_version_	1866914206265114624
author	Meyer, A. S. Cai, T. Moore, M. Akhter, S. Dar, Z. Ahmad Athar, M. Sajjad Betancourt, M. Budd, H. Caceres, G. Correia, D. S. Díaz, G. A. Felix, J. Gago, A. M. Gallagher, H. Gaur, P. K. Gilligan, S. M. Gran, R. Granados, E. Harris, D. A. Hart, A. L. Hill, R. J. Kleykamp, J. Klustová, A. Kordosky, M. Last, D. Lozano, A. Manly, S. Mann, W. A. McFarland, K. S. Moreno, O. Nelson, J. K. Olivier, A. Paolone, V. Perdue, G. N. Pernas, C. Ramírez, M. A. Ransome, R. D. Ruterbories, D. Schellman, H. Salinas, C. J. Solano Vaughan, N. H. Wascko, M. O. Zazueta, L.
author_facet	Meyer, A. S. Cai, T. Moore, M. Akhter, S. Dar, Z. Ahmad Athar, M. Sajjad Betancourt, M. Budd, H. Caceres, G. Correia, D. S. Díaz, G. A. Felix, J. Gago, A. M. Gallagher, H. Gaur, P. K. Gilligan, S. M. Gran, R. Granados, E. Harris, D. A. Hart, A. L. Hill, R. J. Kleykamp, J. Klustová, A. Kordosky, M. Last, D. Lozano, A. Manly, S. Mann, W. A. McFarland, K. S. Moreno, O. Nelson, J. K. Olivier, A. Paolone, V. Perdue, G. N. Pernas, C. Ramírez, M. A. Ransome, R. D. Ruterbories, D. Schellman, H. Salinas, C. J. Solano Vaughan, N. H. Wascko, M. O. Zazueta, L.
contents	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.
format	Preprint
id	arxiv_https___arxiv_org_abs_2512_14097
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	The Nucleon Axial Form Factor from Elementary Target Data Meyer, A. S. Cai, T. Moore, M. Akhter, S. Dar, Z. Ahmad Athar, M. Sajjad Betancourt, M. Budd, H. Caceres, G. Correia, D. S. Díaz, G. A. Felix, J. Gago, A. M. Gallagher, H. Gaur, P. K. Gilligan, S. M. Gran, R. Granados, E. Harris, D. A. Hart, A. L. Hill, R. J. Kleykamp, J. Klustová, A. Kordosky, M. Last, D. Lozano, A. Manly, S. Mann, W. A. McFarland, K. S. Moreno, O. Nelson, J. K. Olivier, A. Paolone, V. Perdue, G. N. Pernas, C. Ramírez, M. A. Ransome, R. D. Ruterbories, D. Schellman, H. Salinas, C. J. Solano Vaughan, N. H. Wascko, M. O. Zazueta, L. High Energy Physics - Experiment High Energy Physics - Phenomenology 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.
title	The Nucleon Axial Form Factor from Elementary Target Data
topic	High Energy Physics - Experiment High Energy Physics - Phenomenology
url	https://arxiv.org/abs/2512.14097