October 31, 2023 to November 4, 2023
Europe/Athens timezone

Nucleon axial-vector form factor, neutrino cross sections, and QED nuclear medium effects

Nov 1, 2023, 5:50 PM
Talk in workshop 2: "QCD analysis of nucleon structure" Parallel Workshop 2


Oleksandr Tomalak (Los Alamos National Laboratory)


Charged-current quasielastic neutrino scattering is the signal process in neutrino oscillation experiments and requires precise theoretical prediction for the analysis of modern and future experimental data, starting with the nucleon axial-vector form factor. In this talk, I compare a new MINERvA measurement of this form factor with lattice-QCD calculations and deuterium bubble-chamber data, provide uncertainty projections for future extractions, and present recent calculations of radiative corrections to charged-current processes. The exchange of photons with nuclear medium modifies (anti)neutrino and electron scattering cross sections. We study the distortion of (anti)neutrino-nucleus and charged lepton-nucleus cross sections and estimate the QED-medium effects on the final-state kinematics and scattering cross sections. We find new permille-to-percent level effects, which were never accounted for in either (anti)neutrino-nucleus or electron-nucleus scattering.

Primary authors

Clarence Wret (University of Oxford) Ivan Vitev (Los Alamos National Laboratory) Kevin McFarland (University of Rochester) Oleksandr Tomalak (Los Alamos National Laboratory) Qing Chen (University of Science and Technology of China, Hefei, Anhui) Rajan Gupta (Los Alamos National Laboratory) Richard Hill (University of Kentucky and Fermilab) Roberto Petti (University of South Carolina) Tanmoy Bhattacharya (Los Alamos National Laboratory)

Presentation materials