New experimental limits on the probabilities of pauli-forbidden transitions in the C nucleus from data obtained with the borexino detector.

The Pauli exclusion principle was tested for nucleons in the C nucleus by using data from the Borexino detector. The approach used consisted in seeking photons, neutrons, and protons, as well as electrons and positrons, emitted in the Pauli-forbidden transitions of nucleons from the 1 P shell to the filled 1 S shell. Owing to a uniquely low background level in the Borexino detector and its large mass, the currently most stringent experimental limits were obtained for the probabilities and relative intensities of Pauli-forbidden transitions for the electromagnetic, strong, and weak channels. [ABSTRACT FROM AUTHOR]