Poster P14: Quantum Entanglement and Thermal Behavior in Charged-Current Weak Interactions


George Iskander, University of Chicago (incoming graduate student), Yale (class of 2020)


We propose that thermalization due to entanglement entropy between distinct regions of the nucleon in a nucleus can explain the origin of the exponential component of the momentum distribution in weak interactions. We demonstrate this by studying anti-neutrino-nucleus scattering on hydrocarbon at Fermilab using data from the MINERvA collaboration. We find that for charged-current muon anti-neutrino scattering on the hydrocarbon CH (which produces a neutral pion) at 3.6 GeV, the pion momentum distribution includes a thermal component that is described by an exponential function, as predicted by our proposition. For charged-current coherent anti-neutrino scattering on carbon at 3 GeV, this thermal component disappears, as also expected in our study. These results support the hypothesis that when entanglement entropy in the nucleon wave function exists in the collision, a thermal component to the momentum distribution results, described by an exponential fit to the data. This phenomena, already observed in proton-proton collisions at the Large Hadron Collider, is now shown to exist in this weak interaction as well.




Back to list of posters