Coincidence (e,e'p) Scattering on 40Ar and 48 Ti to Aid Precision Neutrino Oscillation Experiments*

Neutrino oscillations are an active area of research, with experiments such as DUNE (Deep Underground Neutrino Experiment). DUNE will make use of large liquid argon detectors to perform a precision measurement of the CP violating phase. Hence, an understanding of the argon nuclear ground state and its response to (anti-)neutrino interactions is of paramount importance. Information about the nuclear ground state is encapsulated in the spectral function, $S(k,E)$, the joint probability of removing a nucleon of momentum $k = |\textbf{k}|$ from the ground state leaving the residual (A-1) system with excitation energy E. E12-14-012 at Jefferson Lab ran in early 2017 and has measured the argon spectral function through coincidence $(e,e^{\prime}p)$ scattering on $^{40}$Ar and $^{48}$Ti. The results of E12-14-012 are important to both the neutrino and nuclear physics communities. A direct measurement of the coincidence $(e,e^{\prime}p)$ cross section from $^{40}$Ar and $^{48}$Ti will provide valuable information about the argon nucleus, as well as the experimental input necessary to constrain theoretical models used to calculate $S(k,E)$, paving the way for reliable estimates of the neutrino cross sections. Data from E12-14-012 is currently being analyzed at UVA and Va. Tech.