Extended Data Fig. 5: Background constraint method tested on a neutrino sample.
From: Measurement of the axial vector form factor from antineutrino–proton scattering
(Top left) Signal and (top right) QE region distributions of the neutrino sample that looks for proton final states after fit. The vertical error bars around the data points and the error band around the model prediction account for 1 standard deviation due to statistical and systematic uncertainties. (Bottom) Application of ± 100% shift in 2p2h (gray band) on δθR for events in a − 10° < δθP < 10° and 0.2 (GeV/c)2 < Q2 < 0.4 (GeV/c)2 slice. The analog to the CCE selection selects between − 10° and 10° in δθR.