Search for πΆβ’π-Violating Neutrino Nonstandard Interactions with the NOvA Experiment
This Letter reports a search for charge-parity (πΆβ’π) symmetry violating nonstandard interactions (NSI) of neutrinos with matter using the NOvA Experiment, and examines their effects on the determination of the standard oscillation parameters. Data from π π β‘($\bar{π}$ π ) β π π β‘($\bar{π}$ π ) and π π β‘($\bar{π}$ π ) β π π β‘( $\bar{π}$ π ) oscillation channels are used to measure the effect of the NSI parameters π πβ’π and π πβ’π . With 90% CL the magnitudes of the NSI couplings are constrained to be |π πβ’π | β²0.3 and |π πβ’π | β² 0.4. A degeneracy at |π πβ’π | β 1.8 is reported, and we observe that the presence of NSI limits sensitivity to the standard πΆβ’π phase πΏ πΆβ’π .